Download SIMRelay BYOS - SMS Gateway for Android
Enterprise SMS Gateway for Android
Transform dedicated devices into reliable SMS relay nodes for your business infrastructure. SIMRelay BYOS (Bring Your Own SIM) converts ordinary Android smartphones into enterprise-grade SMS gateways that forward incoming messages to your backend systems in real-time.
Download SIMRelay BYOS
Version: v1.0.1 | Size: ~15 MB | Requirements: Android 8.0+
Security: Digitally Signed & Secure
SHA-256: c1e31337a513b3b4dfff49a6d3969bd5df8f55d4f9e91858ea7170ef22c09e2b⚠️ Important: This app is designed for dedicated business devices only. Not recommended for personal smartphones.
Key Features
- Real-time SMS Forwarding: Instantly relay incoming messages to your API endpoints
- Dual-SIM Support: Manage multiple phone numbers on a single device
- Secure Authentication: OAuth2 token-based security with encrypted storage
- Persistent Service: Runs 24/7 as foreground service, auto-restarts after reboot
- Live Dashboard: Monitor connection status, message count, battery, and signal strength
Installation Instructions
- Download the APK file to your Android device
- Enable installation from unknown sources:
- Go to Settings → Security → Install unknown apps
- Allow your browser to install apps
- Open the downloaded APK file
- Tap Install and follow the prompts
- Launch the app and register with your SIMRelay account
Need detailed help? View full installation guide →
System Requirements
Minimum Requirements
- Android 8.0 (Oreo) or higher
- Active SIM card with SMS capability
- Internet connection (WiFi or mobile data)
- 50 MB free storage
Required Permissions
For transparency, this app requires the following permissions:
- SMS: Receive and read incoming messages
- Phone state: Identify SIM cards
- Internet access: Forward messages to your API
- Foreground service: Run continuously in background
- Boot receiver: Auto-start after device restart
Security & Trust
- Digitally signed APK with verifiable signature
- Encrypted local storage (AES-256)
- HTTPS-only communication
- No third-party data sharing
- Enterprise-grade security standards
SHA-256 Checksum: 0742fde3d6e8ebc5b3c5c434691ded598e5f8477f790a3c369bc9185996678af
Frequently Asked Questions
Why isn't this on Google Play Store?
Google Play has strict policies around SMS interception. Apps that forward SMS to external servers are generally not permitted in the consumer Play Store. SIMRelay BYOS is designed for enterprise use on dedicated devices.
Is this app safe to use?
Yes. The app uses industry-standard security (OAuth2, AES-256 encryption, HTTPS). However, it should only be installed on dedicated business devices, not personal phones.
What happens to my SMS messages?
Messages are forwarded only to YOUR configured API endpoint. No third parties have access. You control where messages go.
Can I use this on my personal phone?
Not recommended. This app is designed for dedicated SMS gateway devices used exclusively for business purposes.
How do I get a SIMRelay account?
Visit simrelay.com to register and get your device PIN.
What if I need support?
Email us at [email protected] or visit our documentation for help.