gevey sim on tmobile loosing service randomly help

[onetrendahead]

my gevey 3g sim seems to loose signal once in a while i dont know why. my 3g it jailbroken with pwnage on tmobile

the signal thing is werid its T-...

is it supose to look like that on tmobile with the gevey sim
T-...

 

[onetrendahead]

i cant figure out why my carrier logo is just T-...

is that normal?

also why do i seem to keep loosing service after having the phone sleep for about 5 minutes.