I use my Sony z1 compact as USB modem. But One day it stoped working. When connect phone to PC, phone says that When using phone as modem error ocurred. And then on PC i see yealow exclamation mark says undentify network. Alter that i rebooted phone. Not worked. Then i restored phone to factory settings (5.1.1) lolipop. But still nothing working. My PC Not cose this to. To try that i plugged Samsung phone and Internet worked Alter few seconds. So how shuld i fix this?
