Why my Iphone3g looses its Tmobile signal?

Hi, I recently purchased a used Iphone 3g, but my Tmobile signal drops easily. I live in an area where there are not problems with signals. Phone calls drops easily when using my Iphone 3g, and when I'm driving, I get a no signal icon. The phone configuration is right. Can someone give a clue of what could the problem be, and advise.

LMAO

welcome to tmobile…

PLUS… You have a Iphone 3G… Which MEANS that you have a ATT Iphone 3G… Jailbroke it and hack unlocked it so it could work on ATT… Please understand that ATT and Tmobile share different 3G settings… ATT uses quad band 850, 1900, 1850, and 2100 for 3G… Tmobile only uses 1700 and 2100… So, there's only 2100 in common… So when you get to an area of a tmobile that only gives off 1700… Then your are screwed… Cause ATT phones don't have 1700 radios… ATT phones have the quad band radio… So… When you get to the 1700 tower area, you will have no 3G… Drop instantly to 2G by default… Handoff from 3g to 2G is sacked… Causing you to drop and loose signal and calls…

so… Walla… Welcome to Tmobile… Want realiable service? Get a tmobile branded phone… Or… Leave tmobile… Your choice

simple… Issue resolved… Next question

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