my phone did an update and now wont pass the 4G screen when turned on

[AC Question]

My phone is an android and wont turn on after an update. It goes to a white screen that says 4G.
Also, my kindle app keeps coming up and says it isn't working correctly and I have to hit ok. But each time the kindle app isn't open.

 

[belodion]

If possible on whatever device you have, try a Cache Partition wipe.