https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780574#M4594 <P>I am using an iPhone 12 with iOS 18.3.1 and the transaction appears to be processing but returns with “Failed payment. Square encountered an unexpected error”. I log into an iPhone 16 and it works</P> Mon, 22 Sep 2025 13:46:16 GMT Timmulligan0 2025-09-22T13:46:16Z https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780574#M4594 <P>I am using an iPhone 12 with iOS 18.3.1 and the transaction appears to be processing but returns with “Failed payment. Square encountered an unexpected error”. I log into an iPhone 16 and it works</P> Mon, 22 Sep 2025 13:46:16 GMT https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780574#M4594 Timmulligan0 2025-09-22T13:46:16Z https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780604#M4595 <P><a href="https://community.squareup.com/t5/user/viewprofilepage/user-id/713775">@Timmulligan0</a>&nbsp;have you double checked and made sure your square app is up to date?&nbsp; Old faithful suggestion, try uninstalling and reinstalling the square POS app.&nbsp; I had an issue last week with the teams app that I had to do this and I don't often have to with apple devices.</P><P>&nbsp;</P><P>How are you trying to process the payment?&nbsp; tap pay? or with a reader?</P> Tue, 04 Mar 2025 11:18:41 GMT https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780604#M4595 Donnie-M 2025-03-04T11:18:41Z https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780684#M4596 <P>What a gift. I focused on the IOS update, never thought about Square. That worked. Thank you&nbsp;</P> Tue, 04 Mar 2025 17:19:32 GMT https://community.squareup.com/t5/Appointments-Bookings/Failed-payment/m-p/780684#M4596 Timmulligan0 2025-03-04T17:19:32Z