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 SIMRelay account in real-time.

Download SIMRelay BYOS

Follow this link to the Android App Store QR code

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

  1. Download from the Google Playstore
  2. Launch the app and register with your SIMRelay account

Need detailed help? Write us at support@simrelay.com

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, read and send 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

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. You can use any Android phone including many older devices as the app goes easy on your phone's resources.

How do I get a SIMRelay account?

Visit simrelay.com to register and start registering devices.

What if I need support?

Email us at support@simrelay.com or visit our documentation for help.