SMS2Telegram is a lightweight Android utility app that automatically forwards SMS messages, incoming call alerts, and low‑battery warnings to a Telegram Bot.
It is designed for users who keep a SIM card in a spare phone, travel internationally, or need remote access to verification codes and device status.
The app runs reliably in the background and does not require the UI to stay open.
- Automatically forwards incoming SMS to Telegram.
- Includes sender number, message body, and timestamp.
- Full dual‑SIM support:
- Detects SIM1 / SIM2
- Reads carrier name
- Reads SIM phone number (if provided by carrier)
- Sends a Telegram alert when the phone receives a call.
- Includes:
- SIM card used
- Caller number
- Call end time
- Call duration
- Call type (answered / missed)
- Uses TelephonyCallback, compatible with Android 12+.
- Runs as a foreground service for reliability.
- Sends a Telegram alert when battery drops to 5%.
- Sends the alert only once until battery rises above 10%.
- Works even if the app UI is closed.
- Configure:
- Telegram Bot Token
- Telegram Chat ID
- Enable/disable:
- SMS forwarding
- Call alerts
- Battery alerts
- Includes a Test Send button to verify configuration.
Replace the image paths below with your actual files in the
screenshot/folder.
| App Home | Settings Page |
|---|---|
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The app requires the following permissions:
READ_PHONE_STATE— detect call stateREAD_CALL_LOG— retrieve caller number after call endsREAD_SMS— required for SMS forwarding (if enabled)FOREGROUND_SERVICE— run call monitor reliablyFOREGROUND_SERVICE_DATA_SYNC— required on Android 14+
- The app starts a foreground service (
CallMonitorService). - During ringing and during the call:
- The app only prints logs.
- It does not attempt to read the caller number.
- When the call ends (state becomes
IDLE):
- The app reads the most recent incoming/missed call from Call Log.
- It extracts:
- Number
- SIM card
- End time
- Duration
- Call type
- Sends the formatted message to Telegram.
This approach is fully compliant with Android 10–16 privacy restrictions.
The app listens to each active subscription ID.
SIM identification is based on:
PHONE_ACCOUNT_IDfrom Call Log (preferred)- Fallback to the subscription ID of the listener
This ensures correct SIM detection even on devices with two active SIM cards.
- No data is stored locally.
- No data is uploaded except to your own Telegram bot.
- The app does not collect analytics or share data with third parties.
- Caller number cannot be retrieved during ringing or during the call
(Android privacy restriction) - Call Log entry is only available after the call ends
- Some OEMs may delay Call Log updates by 1–2 seconds
This project is provided as‑is for personal use.