Turn your Android phone into an SMS/USSD gateway.

Connect a phone once and send SMS, run USSD commands, and receive events from the web panel or your own code via REST API and webhooks.

Get started View pricing

How it works

From a spare Android phone to a live gateway in three steps.

  1. 1

    Install the app

    Download and install the ASMAS app on any Android phone — an old spare device works perfectly.

  2. 2

    Sign in with your email

    Passwordless sign-in: enter your email, get a one-time code, and you're in. No passwords to remember.

  3. 3

    Register and start

    Register your device, configure each SIM slot, and press Start. The phone appears online in the web panel, ready for work.

Features

Your own SIMs, your own infrastructure — no third-party SMS provider.

Send SMS via REST API

POST /api/sms/send with delivery reports (queued, submitted, delivered, failed) — no provider, messages go out on your own SIMs.

Receive SMS and call logs

Inbound events are forwarded to your webhook URL, with a Telegram fallback or SMS if the webhook fails.

USSD commands

Send USSD commands from the web panel — check balances, activate carrier services — and see the response right in the panel.

Multiple SIMs per device

Two SIM slots per phone, with per-SIM feature toggles (send SMS, receive SMS, USSD, call reports) and per-SIM naming.

Live web panel

Device online status, a usage dashboard, and outbound message history with delivery-status badges that update live.

Reliable by design

Android foreground service, heartbeat keep-alive, and offline session sync — events buffered on the phone are replayed on reconnect.

Passwordless auth

Sign in with a one-time code sent to your email. No passwords to remember, reuse, or leak.

Pricing

Every plan starts with a 7-day free trial — connect one phone with two SIM slots and try the full pipeline before you pay.

Individual

$7/month

  • 1 device
  • 2 SIM slots per device
  • 1 SMS every 5s per device
  • 90 days of message history
  • 20 API requests per minute
Start free trial

Pro

Popular

$29/month

  • 10 devices
  • 2 SIM slots per device
  • 1 SMS every 5s per device
  • 90 days of message history
  • 60 API requests per minute
Start free trial

Custom

Let's talk

Enterprise plan — limits and pricing are negotiated. Contact sales.

Contact sales

Tested phones

ASMAS runs on ordinary Android phones. Check the list of devices we have confirmed to work before you sign up.

Browse tested phones