# 3G

import ReaderHero from '@components/content/ReaderHero.astro';

<ReaderHero
  alt="3G card reader"
  src="/img/terminal-payments/readers/3g-2x.png"
  srcset="/img/terminal-payments/readers/3g-1x.png 1x, /img/terminal-payments/readers/3g-2x.png 2x, /img/terminal-payments/readers/3g-3x.png 3x"
  width={320}
  height={556}
/>

The 3G reader is a standalone mobile reader with its own network connectivity and optional printer support.

## Basic Information

| Category | Details |
| --- | --- |
| Device type | Standalone card reader |
| Main connections | Built-in SIM, Wi-Fi, and Bluetooth |
| Hardware characteristics | Mobile standalone reader with optional paired printer support |
| Accepted payment types | Card-present payments on the reader, including contactless and chip flows |
| Good fit for | Merchants who want standalone mobility without depending on a phone for every sale |

## Integration Compatibility

- [Android SDK](/terminal-payments/sdks/android-sdk/)
- [iOS SDK](/terminal-payments/sdks/ios-sdk/)
- [Payment Switch](/terminal-payments/payment-switch/)

## What to Expect

- The built-in SIM and Wi-Fi support make 3G more independent than app-paired readers.
- Bluetooth support is also available for connected device workflows.
- Printed receipts typically rely on the 3G printer accessory rather than the reader alone.