if you are here it is most likley the junk micro USB port of your phone has burnt out it is east to replace but it is a design flaw so it will happen again I am currently about to replace mine for the second time.these phones burn out the contacts in your micro usb socket and your usb cable the main reason for this in my opinion is the garbage battery is so small you will be charging your phone way too often the phone it self would be a good phone if this issue was fixed but mu advice is replace the port and sell/trade in the phone or bulk buy the board the micro usb comes on because mine only lasted 3 months after replacing as the chinese replacements found online are lesser quality them the OEM.
the back case is heated to soften the double sided tape that holds it on and pried up with a creddit card or butter knife and then there are a few micro philips head screws to undo and some connectors and tape.
you don't need instruction's to do this job it's pretty basic but should be a return/refund as it is a fault with the phone not the "we don't cover wear and tare" they use to get them off the hook.
also there are bigger capacity batteries that will fit in this phone that may help extend it life and thuss require less charging and give you longer life out of the charging port.
dear sony this is a 1 star out of 10 phone
