what android tablet do you have, as there are thousands of versions?

The Square contactless and chip card reader is supported on most Android devices with the following:

• Your Android device must be running Android Lollipop or higher.
• An updated version of the Square app: Version 4.70 or higher for Android. Learn how to update your Square app.
• Built-in Bluetooth Low Energy.

You can check if your specific device is supported here.

We can’t guarantee support with all Android devices at the moment, but we’re working to support as many as possible. If your device isn’t currently on this list, there’s a chance it will be supported in the future.

If you have any problems with your reader, you can return it within 30 days.