SMS Blast India 2026: The Complete Guide to Sending, Scheduling & Optimising Mass Text Campaigns

An SMS blast is the single fastest way to reach thousands of customers simultaneously in India. One campaign, one message, delivered to every subscriber on your list within seconds — with a 98% open rate that no email, push notification, or social media post can match.

India's 1.17 billion active mobile connections make it the world's second-largest SMS market. Every major Indian business — from Flipkart's flash sale alerts to HDFC Bank's account notifications, from Domino's lunch offers to IRCTC ticket confirmations — runs on SMS blasts. In 2026, with TRAI's DLT system mature and Google RCS expanding reach, SMS blasts have become more powerful and more compliance-dependent than ever.

This is the complete guide to SMS blasts for Indian businesses: what an SMS blast is and what it is not, how to send one correctly under India's TRAI regulations, the best timing strategy by industry, how to measure campaign ROI, API integration code for developers, and pricing with no hidden charges.

What Is an SMS Blast?

An SMS blast is a marketing-related action that involves sending the same text message to a large group of recipients at once. It is also called a text blast, mass SMS, bulk SMS broadcast, or SMS broadcast campaign — these terms are interchangeable in a business context.

The key characteristics of a legitimate SMS blast:

• A single message (or personalised variant) sent to a subscriber list simultaneously

• Recipients have opted in to receive communications from your business

• The message is sent through a compliant platform with registered sender ID and DLT-approved template (India-specific)

• Delivery happens within seconds — most subscribers receive the message before you finish your coffee

• A delivery report shows exactly how many messages were delivered, to which operators, and at what time

When you need to get a message out quickly to a large group of people, texting is an ideal option. It isn't practical to text hundreds of employees or customers individually. Text blasts solve this problem, which is why many businesses use them in marketing, customer service, feedback collection, and employee communication.

SMS Blast vs Bomb SMS: The Distinction Every Indian Business Must Understand

The term "SMS bomb" or "bomb SMS blast" refers to something categorically different — and illegal. An SMS bomb floods a single recipient's inbox with hundreds or thousands of messages in rapid succession, with the intent to harass, overwhelm, or disrupt. It is not a marketing tool; it is an attack.

Under India's Information Technology Act, 2000 (Section 66A as reinterpreted under Section 67 post-2015), and TRAI's TCCCPR 2018 regulations, sending unsolicited flood messages is a criminal offence carrying penalties including imprisonment. TechTo Networks' platform does not permit SMS bombing — rate limits, recipient uniqueness checks, and fraud detection prevent it by design.

The confusion between "SMS blast" (legitimate mass marketing) and "bomb SMS" (illegal harassment) exists only in terminology — not in practice. A business running a Diwali sale campaign is doing an SMS blast. A person sending 500 messages per minute to a single number is SMS bombing. This guide covers only the former.

Types of SMS Blasts in India

Not all SMS blasts work the same way. India's TRAI framework defines distinct message categories, each with different delivery rules, timing restrictions, and DLT registration requirements.

Promotional SMS Blast

A promotional SMS blast sends marketing content — sale offers, discount codes, event announcements, product launches, and brand communications — to opted-in subscribers.

TRAI rule: Promotional SMS can only be sent between 10:00 AM and 8:00 PM IST. Recipients must not be registered on NCPR (National Customer Preference Register / DND). Your message template must be registered on DLT as a "Promotional" category template.

Best for: Retail sale campaigns, festival offers (Diwali, Onam, Navratri), restaurant promotions, real estate project launches, event invitations, loyalty programme offers.

Rate at TechTo Networks: ₹0.13 per SMS

Transactional SMS Blast

A transactional SMS blast sends service-related notifications — order confirmations, delivery status updates, payment receipts, appointment reminders, and account alerts — to all subscribers regardless of DND registration.

TRAI rule: Transactional SMS can be sent 24 hours a day, 7 days a week, to all subscribers including DND-registered numbers. The content must be service-related — no marketing language permitted.

Best for: E-commerce order updates, logistics dispatch notifications, banking account alerts, hospital appointment reminders, school fee notifications, insurance policy renewals.

Rate at TechTo Networks: ₹0.18 per SMS

OTP SMS Blast

An OTP blast sends one-time passwords for authentication events — login verification, payment confirmation, account creation, and form submissions — with the highest delivery priority of any SMS type.

TRAI rule: OTP messages are classified as transactional but routed on a dedicated high-priority lane separate from regular transactional traffic. Sub-3-second delivery is the standard.

Best for: Fintech payment authentication, user registration flows, account recovery, delivery confirmation, healthcare portal access.

Rate at TechTo Networks: ₹0.18 per OTP

Voice SMS Blast

A voice blast places automated outbound calls to a subscriber list, delivering a pre-recorded or text-to-speech audio message. No internet required on the recipient's device — works on 2G feature phones.

Best for: Rural outreach campaigns, audiences with low SMS literacy, election campaigns, government scheme announcements, industrial workforce alerts.

Rate at TechTo Networks: ₹0.45 per call | Supports Hindi, English, Tamil, Telugu, Malayalam, Kannada, Bengali, Marathi, Gujarati

WhatsApp Blast

A WhatsApp blast sends marketing or service messages through WhatsApp Business API to opted-in subscribers. Supports rich media — images, PDFs, videos, and interactive buttons.

Important distinction from SMS blast: WhatsApp blasts require Meta Business Account verification, approved message templates, and explicit opt-in via WhatsApp. Delivery is limited to subscribers with active WhatsApp accounts. SMS blast, by contrast, works on every mobile number in India regardless of smartphone or internet availability.

Rate at TechTo Networks: ₹0.35 per message

How to Send an SMS Blast in India: Step-by-Step

A text blast is when you send one SMS message to many people at once. You use mass texting software to upload your contact list, write your message, and send or schedule it. Each person gets the message on their phone.

For India specifically, there are three additional mandatory steps before any SMS blast can legally transmit.

Step 1: Complete DLT Registration (One-Time Setup, 7–10 Days)

Every Indian business must register on TRAI's Distributed Ledger Technology (DLT) platform before sending a commercial SMS blast. This is non-negotiable — without DLT registration, your messages are silently blocked by all four Indian operators.

Three registrations are required:

Entity Registration: Register your business as a Principal Entity on any TRAI-approved DLT portal — Jio TrueConnect (trueconnect.jio.com), Airtel Smart Connect (smartconnect.airtel.in), or VILpower (vilpower.in). You need: PAN card, GST certificate, incorporation certificate, and authorised signatory identity proof. Timeline: 3–7 business days.

Sender ID Registration: Register the 6-character alphanumeric name that appears as your SMS sender — e.g., DIWALI, TECHTO, SALEIN. Timeline: 24–48 hours post entity approval.

Template Registration: Every SMS blast message format must be pre-approved. Variables (customer name, offer amount, expiry date) are marked {#var#}. Example approved promotional template:

Dear {#var#}, Celebrate Diwali with {#var#}% off sitewide.
Use code {#var#} at checkout. Valid till {#var#}. T&C apply. - TECHTO

TechTo Networks completes DLT registration on your behalf. You provide documents; TechTo handles all three portal steps.

Step 2: Build Your Opted-In Subscriber List

You must get an opt-in from your contacts before you send text blasts. Not only is this required by TRAI guidelines, but obtaining consent increases the likelihood that your texts will be read.

Methods to build a compliant India subscriber list:

• Checkout opt-in checkbox on your e-commerce or booking platform

• "Text DIWALI to TECHTO to receive exclusive offers" keyword opt-in campaigns

• Paper sign-up at physical retail locations

• WhatsApp opt-in flows (subscriber opts in on WhatsApp, is added to SMS list)

• CRM import of customers who consented at purchase

What you cannot do: Purchase third-party number databases, scrape numbers from directories, or assume consent because someone gave you their number for a different purpose.

NCPR scrubbing — removing DND-registered numbers from promotional blast lists — is performed automatically by TechTo Networks before every promotional campaign. You do not need to manage this manually.

Step 3: Write Your SMS Blast Message

SMS blasts form a crucial part of SMS marketing, which is one of the simplest and most successful marketing channels available to businesses of all sizes, in all industries. But the message itself determines whether that channel converts.

Message writing rules for Indian SMS blasts:

• 160 characters maximum for a single-segment SMS (use this limit — multi-segment SMS charges extra credits)

• Lead with the offer, not your brand name: "50% off all shoes today" beats "TechTo Networks announces a sale"

• Include a clear CTA: "Visit techto.in" or "Call 1800-XXX-XXXX" or "Reply YES for details"

• Add urgency: "Valid till 8 PM today" outperforms "ongoing sale"

• End with sender ID: TRAI requires your registered sender ID at the end of the message

• No URL shorteners from unknown domains: Use your own branded short URL or a trusted shortener — unknown short URLs trigger spam filters

Message format that converts for India:

[Offer/Hook] [CTA] [Urgency/Expiry] [Brand Name] - [SENDERID]

Example:
Diwali Special: 40% off all electronics today only. Shop now: techto.in/diwali
Valid till 11 PM. - TECHTO

Step 4: Segment Your List for Relevance

A promotional SMS blast sent to your entire database generates lower ROI than the same budget spent on segmented sends. Segment by:

• Geography: Reach only subscribers in Delhi for a store-specific offer

• Purchase history: Blast electronics buyers with electronics offers, not clothing deals

• Inactivity: Re-engagement blasts for subscribers who have not purchased in 90 days

• Language preference: Malayalam blast for Kerala subscribers, Hindi for North India

• Time zone / city: Schedule differently for Kolkata (IST) vs Bangalore (same IST but different peak hours)

TechTo Networks' campaign builder supports all segmentation variables via CSV tags or API parameters.

Step 5: Schedule for Peak Engagement Windows

Timing is the single most controllable variable in SMS blast ROI. You can send your campaign immediately, or schedule it for a future date and time.

For India specifically, the optimal windows differ by industry (see India-specific timing guide below). TechTo's scheduler allows you to set exact IST timestamps down to the minute.

Step 6: Send, Monitor, and Optimise

Use analytics tools to monitor delivery, opens, clicks, and responses. This helps you understand what works and how to improve future campaigns.

TechTo Networks' real-time dashboard shows:

• Delivery rate by operator (Jio, Airtel, Vi, BSNL separately)

• Delivery speed distribution (how many messages delivered in <3s, 3–10s, >10s)

• Click-through rate for campaigns with tracked short URLs

• Bounce list (invalid numbers, permanently unreachable) for list cleanup

• Opt-out rate per campaign

India SMS Blast Timing Guide: When to Send by Industry

This is the data that no competitor publishes — optimal India-specific timing windows by business type.

Industry	Best Day	Best Time (IST)	Why
Retail (general)	Saturday	5:00 PM – 7:00 PM	Pre-evening shopping decision window
E-commerce	Wednesday, Thursday	12:00 PM – 2:00 PM	Lunch browse-and-buy peak
Restaurants / QSR	Mon–Fri	11:30 AM – 12:30 PM	Lunch decision window
Real estate	Saturday, Sunday	10:00 AM – 12:00 PM	Weekend property browsing
Healthcare / clinics	Tuesday, Wednesday	9:00 AM – 11:00 AM	Appointment booking decision
Education / coaching	Sunday	11:00 AM – 1:00 PM	Family decision time
BFSI / fintech	Mon–Fri	10:00 AM – 11:00 AM	Start-of-business day finance decisions
Travel / hospitality	Friday	4:00 PM – 6:00 PM	Weekend trip planning
Jewellery	Pre-festival (3 days before)	6:00 PM – 8:00 PM	Festival gift purchasing
Logistics alerts	Any	Send on trigger	Delivery alerts are time-critical, not scheduled

India-specific high-ROI blast windows:

Period	Dates (Approx.)	Highest ROI Industries
Onam	Aug–Sep	Kerala retail, jewellery, restaurants, hotels
Navratri–Dussehra–Diwali	Oct	All retail, jewellery, FMCG, e-commerce
Dhanteras	Nov (day before Diwali)	Gold, electronics, appliances
Christmas–New Year	Dec 23 – Jan 1	Hospitality, restaurants, travel, retail
Vishu	April 14–15	Kerala jewellery, clothing, real estate
Akshaya Tritiya	April–May	Gold, jewellery, property
IPL Season	March–May	Food delivery, beverages, sports merchandise
Budget Day (Union Budget)	Feb 1	BFSI, real estate, automotive
Back to School	June	Ed-tech, stationery, uniform retail

SMS Blast ROI: What Indian Businesses Actually Achieve

The average open rate for SMS marketing campaigns is 98%, which completely blows email marketing campaigns out of the park. SMS campaigns also cost considerably less, which means they provide a great return on investment.

Here is what SMS blast ROI looks like in India across real business scenarios:

Retail Diwali Campaign

Setup: Fashion retailer, Bangalore. List of 25,000 opted-in subscribers. Promotional blast: "Diwali Sale: 35% off all ethnic wear today only. Shop now: [URL]. Valid till 8 PM. - TECHTO"

Cost: 25,000 × ₹0.13 = ₹3,250 + GST = ₹3,835 total

Result: 24,350 delivered (97.4%). 3,200 URL clicks (13.1% CTR). 420 purchases averaging ₹1,800. Revenue generated: ₹7,56,000. ROI: 197×.

E-Commerce Flash Sale OTP + Notification

Setup: D2C skincare brand, pan-India. 50,000 subscriber list. Transactional notification: "Your Diwali order #[ORDER] confirmed. Delivers by [DATE]. Track: [URL]. - TECHTO"

Cost: 50,000 × ₹0.18 = ₹9,000 + GST = ₹10,620

Result: 49,600 delivered (99.2%). 12,400 link clicks (25% CTR — transactional messages have higher CTR than promotional). Zero customer support calls about order status (normally 800+ on peak days). Support cost saving: ₹40,000 (estimated). Net positive ROI from cost avoidance alone.

Healthcare Appointment Reminder Blast

Setup: Multispeciality hospital, Chennai. 8,000 upcoming appointment patients. Reminder: "Reminder: Your appointment at [HOSPITAL] is on [DATE] at [TIME]. Reply CANCEL to reschedule. - SENDERID"

Cost: 8,000 × ₹0.18 = ₹1,440 + GST = ₹1,699

Result: 7,840 delivered (98%). No-show rate dropped from 22% to 9% (industry benchmark reduction: ~28–35% improvement). Revenue recovered from reduced no-shows: ₹2.1 lakhs per month.

SMS Blast Compliance Checklist for Indian Businesses

Before sending any SMS blast in India, verify all of the following. A single missed item causes silent delivery failure.

• [ ] Entity registration completed on DLT portal — entity ID confirmed

• [ ] Sender ID registered and approved under your entity

• [ ] Message template registered and approved on DLT

• [ ] Message type correctly set: promotional or transactional (not mixed)

• [ ] Promotional blast scheduled between 10:00 AM and 8:00 PM IST only

• [ ] NCPR scrubbing confirmed for promotional lists (platform handles automatically on TechTo)

• [ ] No URL shorteners from unknown third-party domains

• [ ] Message sender ID suffix added at end of template

• [ ] Opt-in consent documented for all recipients

• [ ] Opt-out mechanism available (reply STOP or equivalent)

• [ ] Message content matches registered DLT template exactly (static text)

• [ ] Variable fields correctly mapped in template and message

SMS Blast API for Indian Developers

For businesses integrating SMS blasts into applications, CRM workflows, or marketing automation platforms, TechTo Networks provides a REST API with full DLT compliance automation.

Send a Promotional SMS Blast (Python)

import requests

def send_sms_blast(contacts: list, message_template: str, template_id: str) -> dict:
    """
    Send a promotional SMS blast to a list of contacts.
    contacts: [{"mobile": "9876543210", "name": "Rahul", "offer": "40%"}]
    """
    messages = [
        {
            "to": f"91{c['mobile']}",
            "message": message_template.format(
                name=c["name"],
                offer=c.get("offer", "")
            ),
            "template_id": template_id
        }
        for c in contacts
    ]

    response = requests.post(
        "https://api.techtonetworks.com/v1/sms/bulk",
        headers={
            "X-API-Key": "YOUR_API_KEY",
            "Content-Type": "application/json"
        },
        json={
            "messages": messages,
            "sender_id": "TECHTO",
            "message_type": "promotional",
            "dlt_entity_id": "1100XXXXXXXXXXXXXXX",
            "schedule_time": "2026-10-29T17:00:00+05:30"  # Diwali eve at 5 PM IST
        }
    )
    return response.json()

# Usage
contacts = [
    {"mobile": "9876543210", "name": "Priya", "offer": "40"},
    {"mobile": "8765432109", "name": "Rohit", "offer": "40"}
]

result = send_sms_blast(
    contacts=contacts,
    message_template="Hi {name}, Diwali Special: {offer}% off sitewide! Shop: techto.in/diwali Valid till 8 PM. - TECHTO",
    template_id="1107XXXXXXXXXXXXXXX"
)
print(result)
# {"status": "queued", "batch_id": "TN-BATCH-20261029-3821",
#  "total_messages": 2, "scheduled_at": "2026-10-29T17:00:00+05:30"}

Schedule a Transactional Blast (Node.js)

const axios = require('axios');

async function sendOrderBlast(orders) {
  const messages = orders.map(order => ({
    to: `91${order.customerMobile}`,
    message: `Hi ${order.name}, your order #${order.id} is confirmed. Delivery by ${order.deliveryDate}. Track: techto.in/track/${order.id} - TECHTO`,
    template_id: process.env.ORDER_CONFIRM_TEMPLATE_ID
  }));

  const { data } = await axios.post(
    'https://api.techtonetworks.com/v1/sms/bulk',
    {
      messages,
      sender_id: 'TECHTO',
      message_type: 'transactional',
      dlt_entity_id: process.env.DLT_ENTITY_ID,
      callback_url: 'https://yourapp.com/webhooks/sms-delivery'
    },
    {
      headers: {
        'X-API-Key': process.env.TECHTO_API_KEY,
        'Content-Type': 'application/json'
      }
    }
  );

  return data;
  // { status: 'queued', batch_id: '...', total_messages: N, credits_reserved: N }
}

Check Blast Campaign Status (PHP)

function getBlastStatus(string $batchId): array {
    $ch = curl_init("https://api.techtonetworks.com/v1/sms/batch/{$batchId}");
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => ['X-API-Key: ' . $_ENV['TECHTO_API_KEY']]
    ]);
    $result = json_decode(curl_exec($ch), true);
    curl_close($ch);
    return $result;
    // Returns: total, delivered, failed, pending, delivery_rate, avg_delivery_ms
}

Full API documentation: docs.techtonetworks.com/sms-blast-api

SMS Blast vs WhatsApp Blast: Which to Use in India

Both channels are effective for Indian businesses. Here is how to choose.

Factor	SMS Blast	WhatsApp Blast
Device requirement	Any mobile phone	Smartphone with WhatsApp
Internet requirement	No	Yes
Coverage in India	100% of mobile subscribers	~70–75% smartphone users
Rich media support	No (text only)	Yes (images, PDF, video, buttons)
Open rate	98%	85–90%
DLT registration	Yes — mandatory	No (Meta registration instead)
Time window restriction	10AM–8PM (promotional)	None
Cost per message	₹0.13–₹0.18	₹0.35 + Meta session fee
Opt-in requirement	Yes (TRAI NCPR)	Yes (WhatsApp)
Read receipts	No	Yes (blue ticks)
Two-way replies	Limited	Full
Best for	Broad reach, time-critical, rural	Rich content, urban, conversational

The India recommendation: Run SMS blast as your primary reach channel for maximum coverage. Add WhatsApp blast as a secondary channel for high-value customers, rich content campaigns (product catalogues, property brochures, event invitations), and interactive flows. TechTo Networks supports both from a single API with configurable fallback.

SMS Blast Pricing: India 2026

TechTo Networks' complete SMS blast pricing — no hidden charges, DLT included.

Blast Type	Rate	Minimum	DLT	GST
Promotional SMS Blast	₹0.13/SMS	5,000 SMS	✅ Included	18%
Transactional SMS Blast	₹0.18/SMS	1,000 SMS	✅ Included	18%
OTP SMS Blast	₹0.18/SMS	1,000 SMS	✅ Included	18%
Regional Language (Unicode)	₹0.25/SMS	1,000 SMS	✅ Included	18%
Voice Blast	₹0.45/call	500 calls	✅ Included	18%
WhatsApp Blast	₹0.35/msg	1,000 msgs	N/A	18%

Volume Pricing

Monthly Volume	Promotional	Transactional
Up to 50,000	₹0.13	₹0.18
50,001–5,00,000	₹0.11	₹0.16
Above 5,00,000	₹0.09	₹0.14

No platform fee. No setup fee. No DLT surcharge. Credits valid for 12 months.

The Real Cost Comparison

SMS blasts are relatively affordable compared to other marketing channels, providing great value for money. Here is the full-channel comparison for reaching 10,000 customers in India:

Channel	Cost to Reach 10,000	Open Rate	Response Rate	Cost per Response
SMS Blast (TechTo)	₹1,300	98%	8–15%	₹8.67–₹16.25
WhatsApp Blast	₹3,500	85%	10–20%	₹17.50–₹35
Email Marketing	₹500–₹1,000	18–22%	2–4%	₹12.50–₹50
Facebook/Instagram Ads	₹5,000–₹15,000	N/A	1–3%	₹16.67–₹500
Google Search Ads	₹8,000–₹25,000	N/A	2–5%	₹16–₹250

SMS blast delivers the best cost-per-response for broad audience campaigns in India — consistently.

10 SMS Blast Best Practices for Indian Businesses

1. Start with a clean, verified list. Invalid numbers waste credits and inflate your apparent delivery failure rate. Run your list through a number validation check before the first campaign.

2. Personalise at minimum with the recipient's name. A doctor appointment reminder needs to be personalized and include the name of the patients and other personal information so they can make sure the message they receive is for them. The same principle applies to all high-value transactional blasts.

3. Never start your message with the sender ID. Your 6-character sender ID is visible as the "From" field. Starting the message body with your brand name wastes 15–20 characters and delays the offer.

4. One CTA per message. "Visit our store OR call us OR check our website" dilutes action. Pick one.

5. Test before blasting. Send to a 100-number test segment before the full list. Verify: correct DLT template match, delivery on all four operators, URL works, personalisation renders correctly.

6. Schedule in local time. If your list includes subscribers across multiple time zones within India — Assam (IST + effective difference from daily rhythm) vs Gujarat — adjust scheduling for meaningful local timing differences.

7. Set an opt-out path. Even for transactional campaigns, a clear way to stop communications protects your brand reputation. "Reply STOP to opt out" adds only 20 characters.

8. Monitor bounce rates after every campaign. Numbers that bounce repeatedly are deactivated — TRAI port-out or disconnected SIMs. Remove them from future lists to protect your sender reputation.

9. Match the campaign to the DLT template category. Marketing language in a transactional template causes DLT rejection. Service language in a promotional template violates TRAI. The categories must align.

10. Plan your festive calendar two weeks ahead. DLT template approval takes 24–48 hours. Attempting to register a new Diwali template on Diwali evening will result in a blocked campaign. All festival campaign templates should be pre-registered at least a week before.

Frequently Asked Questions About SMS Blasts in India

What is an SMS blast? An SMS blast — also called a text blast, bulk SMS broadcast, or mass SMS — is a single SMS message sent simultaneously to a large list of mobile subscribers. In India, SMS blasts require TRAI DLT registration (entity ID, sender ID, and approved template) before delivery. Open rates are approximately 98%, making SMS blasts one of the highest-reach marketing channels available to Indian businesses.

Is sending an SMS blast legal in India? Yes, SMS blasts are fully legal in India when sent in compliance with TRAI's TCCCPR 2018 regulations. Your business must be DLT-registered, your message template must be pre-approved, promotional blasts must be sent between 10 AM and 8 PM, and recipients must have opted in for promotional messages. TechTo Networks enforces all compliance requirements automatically.

What is the difference between an SMS blast and SMS bombing? An SMS blast is a compliant mass communication sent to an opted-in subscriber list for marketing or service purposes — fully legal and widely used by Indian businesses. SMS bombing is sending hundreds or thousands of messages to a single recipient with intent to harass or disrupt — illegal under India's IT Act and TRAI regulations. TechTo Networks' platform supports legitimate SMS blasts and prevents SMS bombing through rate limits and recipient uniqueness checks.

How much does an SMS blast cost in India? Promotional SMS blasts cost ₹0.13 per SMS at TechTo Networks (minimum 5,000 SMS), with DLT charges included. Transactional blasts cost ₹0.18 per SMS (minimum 1,000). Volume discounts apply from 50,000 SMS/month. There is no platform fee, setup charge, or DLT surcharge. GST at 18% is added to the total.

How do I send an SMS blast in India? To send an SMS blast in India: (1) Complete DLT entity, sender ID, and template registration — TechTo Networks handles this for you. (2) Upload your opted-in contact list. (3) Select your DLT-registered template and fill in variable fields. (4) Schedule your campaign within the 10 AM–8 PM window for promotional messages. (5) Launch and monitor delivery reports. Total setup to first campaign: as little as 4 hours with existing DLT registration, or 7–10 days if registration is needed.

What is the best time to send an SMS blast in India? For retail and e-commerce, Saturday 5–7 PM delivers highest response rates. For restaurants, weekday 11:30 AM–12:30 PM (lunch decision window) is optimal. For healthcare reminders, Tuesday–Wednesday 9–11 AM. For financial services, weekday morning 10–11 AM. Festive campaigns (Diwali, Onam, Navratri) should be sent 2–3 days before the peak shopping day for maximum impact. All promotional SMS must be sent within TRAI's 10 AM–8 PM window.

Can I send an SMS blast in Hindi or regional Indian languages? Yes. Set unicode: true in your TechTo API request to send SMS blasts in Hindi, Tamil, Telugu, Malayalam, Kannada, Bengali, Marathi, or Gujarati. Unicode SMS has a 70-character segment limit instead of 160. Your DLT template must be registered with the regional language text. Rate: ₹0.25 per Unicode SMS.

What delivery rate should I expect from an SMS blast in India? With TechTo Networks' Tier-1 direct operator routes, transactional SMS blasts achieve 99.2% delivery rate. Promotional blasts, after NCPR scrubbing of DND numbers, achieve 96–98% delivery on the valid remaining list. If your delivery rate is below 92% on a clean, opted-in list, your provider is likely using aggregator routes or has a DLT configuration issue.

Send Your First SMS Blast with TechTo Networks

Every SMS blast sent through TechTo Networks travels on Tier-1 direct routes to Jio, Airtel, Vi, and BSNL — no aggregator hops, true operator delivery receipts, and median delivery under 3 seconds for transactional and OTP blasts.

DLT registration is handled entirely by TechTo's onboarding team. Your first campaign can be live within 4 hours if you have existing DLT credentials, or within 7–10 business days from document submission for new registrations.

Start Free — 500 SMS Credits to Blast → View Full SMS Blast API Documentation → Get a Volume Quote for Your Campaign → Talk to an SMS Blast Expert →

TechTo Networks Pvt. Ltd. | Kerala, India | TRAI DLT Registered | Tier-1 Routes: Jio · Airtel · Vi · BSNL