8390 (8310) HELL !! this phone model is a lemon.

I have an 8390 (which is identical to 8310) for some reason a lot of times it loses signal or signal is at full but if i call it it says can't reach. can't make calls it just goes beep beep beep (NOT network busy i get that messege not beep beep when it is busy). Calls die while i am talking. the other person stops hearing me during the converstion for a few seconds.

I am not the only that is having these problems i have noticed all my friends with this phone got this damn problem


I have heard i can convert it to a 6500 and it should solve my problems. Is that true ?