No 4g signal after android update 7.1.1

[Davinlie]

I update my android from 7 to 7.1.1 and after done my lte signal gone my phone is xperia x

[BrolasBrolas]

Is your LTE on? You can check it in the notification bar to the top of your screen. Swipe down to see the settings, and you will see the "LTE" button. Check if it is active.