India TRAI regulations & SIM fair-use handbook
The practical guide to sending lawful business messages from your cellular SIM without incurring carrier blacklists or telecom penalties.
ApnaSandesh is designed for relationship communication with your existing, opted-in customers (patients, registered repair clients, retail invoice recipients). It is strictly not intended for unsolicited cold marketing or mass promotional blasting.
Understanding the 100 SMS/day per SIM threshold
Under TRAI's Telecom Commercial Communications Customer Preference Regulations (TCCCPR), Indian cellular operators (Jio, Airtel, Vodafone Idea, BSNL) enforce a standard cap of 100 SMS per day per SIM card for individual prepaid and postpaid subscribers.
If your clinic or shop sends 40 to 80 appointment reminders, readiness alerts, or payment receipts each day, you remain entirely within your carrier’s standard bundled SMS quota. ApnaSandesh includes a live counter to alert you before you reach daily carrier thresholds.
Enforced daylight sending hours (10:00 AM to 9:00 PM IST)
Indian telecom regulations strictly prohibit promotional commercial communications outside the 10:00 AM to 9:00 PM IST window.
ApnaSandesh includes built-in scheduling via Android WorkManager. If you compose campaign drafts late in the evening, the app lets you schedule them to dispatch automatically the following morning at 10:00 AM.
Mandatory opt-out instructions and on-device suppression
Always provide a clear opt-out path in your message templates (e.g., “Reply STOP to cancel”). When a customer replies STOP, mark them as opted-out in ApnaSandesh.
ApnaSandesh's SQLite suppression firewall permanently blacklists opted-out numbers. Even if you subsequently re-import a customer CSV list that includes that number, ApnaSandesh automatically silences and suppresses the dispatch.
Compliance verification checklist
| Requirement | TRAI / Carrier Rule | ApnaSandesh Implementation |
|---|---|---|
| Daily Quota | 100 SMS / day / SIM | Real-time daily segment tracker & limit alert |
| Sending Hours | 10 AM – 9 PM IST | Campaign scheduler powered by Android WorkManager |
| Opt-Out Handling | Mandatory cessation upon request | Permanent on-device SQLite suppression firewall |
| Burst Throttling | Prevent automated burst spam | Configurable 3.5s to 6.0s sequential delay per SMS |
Start communicating responsibly with your client list today.