Yeah, you should try different carrier.
I had same problem on one of two local carriers since I'm not in US. Oh I was on stock ROM. Interesting is that on custom ROMs I didn't get any FC on both but still you may want to try different carrier if that's an option.
Atrix HD Maxx
SIM, BL: Unlocked
Don't have dropbox account yet? Sing up here
and we both will earn extra 500mb.
Need free antivirus for Windows? I suggest Avast.
Great game deals here
. <--- Use that link and you will get free $2 after first purchase above 2$.