We haven't received any reports regarding the card reader unable to connect to your device, 98010.

Before we do any troubleshooting steps, I'd recommend doing the following:

• Update your QuickBooks release version.
• Update the GoPayment app.
• Update your mobile device to the latest version.

These will keep the applications and devices compatible to each other.

After that, pair the card reader with your GoPayment app again:

1. Go to the Menu in upper-left and click Settings.
2. Select Card Reader and click Type.
3. Change to "Bluetooth reader". You can click the back-arrow.
4. Ensure Bluetooth is turned on in the phone and QB21 device is on.
5. Select "Add a new reader". This should allow the phone to detect the reader.
6. Select the Chip and Swipe reader.
7. The reader is now visible under My Card Readers section.

You can go back to New Payment to take a payment.

Give this a shot and let me know how this goes.