Motorola i776

Cant get pass login page for yahoo the the net feature on this phone, it was working just two weeks ago.

ive had problems with this phone before, mainly with texting and poor reception. but now my phone wont charge. i bought a new charger thinking that was the problem. it worked for a few days, and then the same problem started up again. so i bought a new battery. apparently that wasnt the problem either since it still wont charge. but when i try to charge it, it shows it charging. can anyone tell me how to fix this??

I have had the i776 for a couple of months and I'm really frustrated because I havn't been able to download messenger at all. I would like yahoo if possible. Does anyone know how to do this?