# SMS from your own Android phone | UnlimitedMessaging

> Install the free Android app and your SIM sends SMS from the web app, Claude, ChatGPT, n8n or the API. Your number, your plan, no fee per message.

Source: https://unlimitedmessaging.app/channels/sms

Channel · SMS

# Your phone's SIM,  
sending SMS for you.

Install the free Android app and sign in: your SIM sends and receives SMS from the web app, Claude, ChatGPT, n8n or the API. Your number, your plan.

[Download the APK](https://github.com/UnlimitedMessaging/unlimited-messaging-android/releases/latest/download/unlimited-messaging.apk)[Create a free account](https://app.unlimitedmessaging.app)

Version 0.1.2 · Android 8.0 or newer · MIT licence · [All versions](https://github.com/UnlimitedMessaging/unlimited-messaging-android/releases) · [Source code](https://github.com/UnlimitedMessaging/unlimited-messaging-android)

![QR code linking to the latest Unlimited Messaging APK](https://unlimitedmessaging.app/assets/android/apk-qr.svg)

On a computer?

Scan this code with your Android phone to download the APK.

How it works

## Ready in two minutes

1. 01  
### Install the app  
Download the APK on your Android phone, or scan the QR code, and allow the install for this app.
2. 02  
### Sign in  
Open Unlimited Messaging, sign in, allow SMS access and set the battery to Unrestricted. The app guides you.
3. 03  
### Your SIMs appear  
Each SIM shows up as an SMS account in your dashboard, ready to send. Dual SIM phones get two.

The message received

## A normal SMS, from your number

It leaves from your phone's SIM, so your customer sees the number they already know. Their replies come back to your inbox.

L

Le Petit Zinc

+33 6 12 34 56 78

Le Petit Zinc: see you tomorrow at 8 pm, table for 4\. Reply 1 to confirm.

17:30

1

17:32

### Send it from

* [UMThe web appWrite, reply and follow every conversation in one inbox.](https://app.unlimitedmessaging.app)
* [![](https://unlimitedmessaging.app/assets/logos/anthropic.svg)![](https://unlimitedmessaging.app/assets/logos/openai.svg)Claude or ChatGPTAsk in plain words and your assistant sends it for you.](https://unlimitedmessaging.app/articles/mcp)
* [![](https://unlimitedmessaging.app/assets/logos/n8n.svg)n8nSend from your automations with the community node.](https://unlimitedmessaging.app/articles/n8n)
* [![](https://unlimitedmessaging.app/assets/logos/typescript.svg)![](https://unlimitedmessaging.app/assets/logos/python.svg)API and SDKsTypeScript, Python or one HTTP request.](https://unlimitedmessaging.app/api)
Show the API request

POST /messagecurl

```
curl https://api.unlimitedmessaging.app/message \
  -H "Authorization: Bearer $UM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
        "to": {
          "phone": "+33612345678"
        },
        "channels": [
          {
            "channel": "SMS"
          }
        ],
        "text": "Le Petit Zinc: see you tomorrow at 8 pm, table for 4. Reply 1 to confirm."
      }'
```

The same SMS from your code, with your API key. The SDKs, the n8n node and the MCP server send SMS too.

Good to know

## Built for a human pace

* ### Reminders, codes, replies  
Android lets an app send 30 SMS every 30 minutes, and we space sends to stay within it. Just right for everyday messages.
* ### Text messages  
SMS carry text. For photos and files, the same message can also go out on WhatsApp or by email.
* ### Set once, always on  
With the battery set to Unrestricted, the app stays connected with the screen off and restarts after a reboot.

FAQ

## Questions about SMS

Google Play only allows SMS permissions for the phone's default messaging app. A gateway that sends on behalf of your account cannot qualify, so the APK is published on GitHub Releases, built and signed by a public workflow from the tagged commit.

Nothing on our side: no fee per message, and SMS is included in every plan, Free included. Each SMS leaves from your SIM, so it counts against your mobile plan like one you type by hand.

Each SIM becomes its own SMS account. Pick the one you want when you send, or let Unlimited Messaging choose.

Run apksigner verify --print-certs unlimited-messaging.apk, or use an app like AppVerifier, and compare the SHA-256 fingerprint of the signing certificate with 16:4E:17:28:5F:7F:04:2C:E4:FB:7B:36:9A:31:7F:50:D5:C1:DE:1F:48:15:6D:11:92:1A:1E:54:CB:2C:05:24\. Each release also lists the SHA-256 of the APK.

Set the app's battery usage to Unrestricted (the home screen checklist takes you there) and, on Samsung, Xiaomi, Huawei, Oppo or Vivo, allow auto-start in the manufacturer settings. dontkillmyapp.com documents each brand.

No. It only forwards the SMS that arrive after you sign in, and only to the Unlimited Messaging API. No analytics, no ads, no third-party SDK, and the source code is public under the MIT licence. [Every permission explained](https://github.com/UnlimitedMessaging/unlimited-messaging-android#permissions)

![](https://unlimitedmessaging.app/assets/logos/whatsapp.svg)![](https://unlimitedmessaging.app/assets/logos/email.svg)![](https://unlimitedmessaging.app/assets/logos/sms.svg)

## Turn your phone into an SMS gateway

Create a free account, install the app, and your next message can leave as an SMS from your own number.

[Start for free→](https://app.unlimitedmessaging.app)

Free plan, no credit card. Android 8.0 or newer.

See also[WhatsApp from your number](https://unlimitedmessaging.app/channels/whatsapp)·[Email from your mailbox](https://unlimitedmessaging.app/channels/email)·[Android SMS gateways compared](https://unlimitedmessaging.app/articles/android-sms-gateway-comparison)·[Unlimited SMS & Texts](https://unlimitedmessaging.app/articles/unlimited-sms)·[Pricing](https://unlimitedmessaging.app/pricing)