I just packed up my Mcell to take back but I might give this one last try. With cellular data ON, do ALL your calls have garbled issues or just sometimes? With cellular data OFF, you have NO issues?
It could be me, seeing as how I can't stand the thought of spending $150 plus my own cell plan minutes (unless I want to pay $20 month for unlimited usage at home), but doesn't the above essentially describe the limitations touted by AT&T against Verizon?
If I turn off cellular data, I can't use that data while on a call, correct? I tend to use Google Maps a lot for my non-iPhone friends who call because they are lost (silly, I know).