# Square Stand reader fails with SECURE\_CONNECTION\_TO\_SQUARE\_FAILURE (Mobile Payments SDK iOS 2.7.0, production)

**URL:** <https://developer.squareup.com/forums/t/square-stand-reader-fails-with-secure-connection-to-square-failure-mobile-payments-sdk-ios-2-7-0-production/28361>\
**Category:** Questions\
**Tags:** mobile-payments-sdk\
**Created:** [October 28, 2026, 5:19am UTC](https://developer.squareup.com/forums/t/square-stand-reader-fails-with-secure-connection-to-square-failure-mobile-payments-sdk-ios-2-7-0-production/28361 "2026-10-28T05:19:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nguyensiluc](https://avatars.discourse-cdn.com/v4/letter/n/35a633/32.png) [@nguyensiluc](https://developer.squareup.com/forums/u/nguyensiluc)\
**Post date:** [October 28, 2026, 5:19am UTC](https://developer.squareup.com/forums/t/square-stand-reader-fails-with-secure-connection-to-square-failure-mobile-payments-sdk-ios-2-7-0-production/28361/1 "2026-10-28T05:19:04Z")

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My iOS app uses the Mobile Payments SDK 2.7.0 (Swift Package Manager) in production. The Square Stand’s built-in reader connected on 2026-10-27 around 21:45 Central. It stopped working after I installed Square Point of Sale on the same iPad. Since then the reader is always READER\_UNAVAILABLE with the reason SECURE\_CONNECTION\_TO\_SQUARE\_FAILURE, and retrying doesn’t help.

**Details**

- Application ID: sq0idp-cxq-9SEI6BYDISuyqI
- Location: L4V4BZ6FF
- Bundle ID: com.vietdev
- Team ID: 7Q8Y79
- Device: iPad (A16), iOS 26.6.2, in a Square Stand
- Reader serial: [serial]
- **Failure times (UTC):** 2026-10-28 05:12:10, 05:13:11, 05:14:11

**Already tried**

- Deleted Square Point of Sale, reseated the iPad, and power-cycled the Stand.
- Reinstalled the exact app build that connected on 10-27. It now fails too, so the app code hasn’t changed.
- Tried a non-debuggable ad-hoc build, with the App Attest environment set to production.
- Checked that the Square frameworks in the app match SDK 2.7.0 exactly, including CorePaymentCard UUID 287FA696-8034-3128-AA02-26132B09FA78.
- [Registered the iOS app signature (bundle ID and Team ID) under Production. / The Production signature list was empty.]

Could you check your server logs for why the secure session is rejected at these times? Does installing Square Point of Sale change the Stand reader’s state in a way that blocks other apps?

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**Author:** ![nguyensiluc](https://avatars.discourse-cdn.com/v4/letter/n/35a633/32.png) [@nguyensiluc](https://developer.squareup.com/forums/u/nguyensiluc)\
**Post date:** [October 28, 2026, 5:21am UTC](https://developer.squareup.com/forums/t/square-stand-reader-fails-with-secure-connection-to-square-failure-mobile-payments-sdk-ios-2-7-0-production/28361/2 "2026-10-28T05:21:32Z")

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Did the Stand reader receive a firmware update around 2026-10-27 when Square Point of Sale was installed, and does SDK 2.7.0 support that firmware?

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**Author:** ![helner-square](https://avatars.discourse-cdn.com/v4/letter/h/d9b06d/32.png) [@helner-square](https://developer.squareup.com/forums/u/helner-square)\
**Post date:** [October 28, 2026, 5:10pm UTC](https://developer.squareup.com/forums/t/square-stand-reader-fails-with-secure-connection-to-square-failure-mobile-payments-sdk-ios-2-7-0-production/28361/4 "2026-10-28T17:10:30Z")

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I checked the logs and sent you a DM