Why Use an Android SMS Gateway?
Instead of paying for expensive international SMS via aggregators, you can:
- Use local SIM bundles (e.g. 5,000 SMS pack) for specific operators
- Send transactional alerts and OTP directly from your phone
- Integrate your own apps via HTTP API or webhooks
Basic Architecture
A typical Android SMS gateway solution includes:
- An Android app running on the device
- Background service listening for API requests
- Outbound SMS via standard Android SMS API
- Webhook callback for delivery receipts (when supported)
Sending SMS via HTTP API
Your server (CRM, website, ERP) sends a request like:
POST /api/send-sms
{
"to": "8801XXXXXXXXX",
"text": "Your OTP is 123456",
"tag": "OTP_LOGIN"
}The Android app receives this request, sends the SMS via the SIM card, and responds with a message ID.
Handling Delivery Reports
When Android receives an SMS delivery notification, the app can:
- Update status locally (DELIVERED / FAILED)
- Call your webhook URL:
https://yourserver.com/sms-dlr
This allows your application to track OTP and alert success rates.
Benefits & Limitations
Benefits:
- Low cost using local bundles
- Easy to deploy (Android phone + app)
- Great for small to mid-volume traffic
Limitations:
- Depends on device uptime and network signal
- Not suitable for very high TPS (messages per second)
- Must respect operator policy and regulations
OnnetBD IT SMS Gateway Solutions
We provide:
- Android SMS gateway apps with queueing and retries
- Web dashboard and API documentation
- Dual-SIM routing and failover logic
- Integration with OTP, CRM and notification systems
👉 See our SMS Gateway Solutions, or contact us to discuss your routing and compliance needs.