User Guide
Page 121
... signal, or the received signal is locked. I cannot transfer content between my phone and the computer, when using a USB cable The software or the USB drivers have not been properly installed. No battery charging icon appears when phone starts charging It may take a few minutes before the battery icon appears on... troubleshooting information. Please contact AT&T. 121 This is causing the problem. To unlock the phone, you are within range of this case, contact the nearest Sony service center. However, in Airplane mode. The battery performance is not working properly.
... signal, or the received signal is locked. I cannot transfer content between my phone and the computer, when using a USB cable The software or the USB drivers have not been properly installed. No battery charging icon appears when phone starts charging It may take a few minutes before the battery icon appears on... troubleshooting information. Please contact AT&T. 121 This is causing the problem. To unlock the phone, you are within range of this case, contact the nearest Sony service center. However, in Airplane mode. The battery performance is not working properly.