[jnb903]

Is anyone havinf problems with a 9900 not receiving calls, dropping calls and hanging when making calls? i have 2 days to return it if this is a problem. ATT has already replaced the phone 1 time in 28 days and the 2nd one is doing the same.

[Chaddface]

No problems to report. I didn't use the official AT&T software very long though. I switched to 7.1.0.342

[aluiziomachado]

Im using 7.1.0.391 - Claro - Brasil . I'm having exactly this problem, and it seems to be related to signal strenght. When i'm on H+ signal, no problem at all, but unfortunatelly the 9900 signal floats too much, from 4 bars to just one in seconds and there are many places where the I get just EDGE and it is where i have drop call, uncompleted calls, etc..no fix i guess, sorry

[sjefferson21]

I'd try using a more up to date OS. Try .523 for a day and if that doesn't fix it, go exchange it.

[nickdaman]

Stay away from .523 due to the mic issue. Go with the recent rogers release

[BlazorBoy]

Same issue on TMo. The radio on these phones is subpar.