Help Center

Download the SMS Gateway app from Google Play or our GitHub releases, create an account, generate an API key in the dashboard, then scan the QR code in the app to connect your device. The app will guide you through granting necessary permissions.

SMS Gateway supports Android 6.0 (Marshmallow) and above. We recommend Android 8.0+ for the best experience and latest security features.

Absolutely! This is actually one of the most common use cases. Any Android phone with Android 6.0+ and an active SIM card will work perfectly.

Make a POST request to /api/v1/sms/send with your API key in the X-API-Key header and a JSON body containing 'to' (phone number) and 'message' fields. Check our API documentation for detailed examples in multiple languages.

Free tier: 100 requests/hour. Starter: 1,000/hour. Pro: 10,000/hour. Enterprise: Custom limits. Rate limits reset every hour and are tracked per API key.

Configure a webhook URL in your device settings. We'll send POST requests to your URL for events like incoming messages, delivery confirmations, and status updates. All webhook payloads are signed for security.

Messages are queued on our server and will be delivered once the device reconnects. You can configure multiple devices for redundancy, and we'll automatically route to available devices.

Free: 1 device. Starter: 1 device. Pro: 3 devices. Enterprise: Unlimited. You can upgrade your plan anytime to add more devices.

Yes, to ensure the app stays active in the background. The app will guide you through this during setup. This prevents Android from killing the foreground service.

You'll receive notifications at 80% and 100% usage. Messages will be queued but not sent until you upgrade or your monthly limit resets. No overage charges.

Yes! Upgrades are immediate. Downgrades take effect at the start of your next billing cycle. No penalties or fees for changing plans.

We offer a 14-day money-back guarantee on all paid plans. If you're not satisfied, contact support for a full refund.

1) Verify device is online in the dashboard. 2) Check SIM card has SMS credit/plan. 3) Verify phone number format (E.164 format recommended). 4) Check API key permissions. 5) Review error logs in the dashboard.

Failed messages include error codes in the webhook callback and dashboard. Common issues: invalid number, blocked by carrier, insufficient SMS credit. Enable delivery confirmations to track status.

Ensure battery optimization is disabled, app has all required permissions, and a stable internet connection (Wi-Fi recommended). Check for Android system updates and ensure the app is up to date.