Question [Q] Nexus S OTA 4.0.3 reception issues on T-mobile

I've been having major reception issues since I updated to 4.0.3, has anyone else?

I usually get Edge or HSPA coverage in my area before the official update, but lately it's been mostly G or Edge (if I'm lucky). I'm on T-mobile. Has anyone else had this problem? Or does anyone have any suggestions on how to fix it?
T-mobile G2
ROM: Cyanogen 7 RC 1

Limited Edition Galaxy Tab 10.1
Honeycomb 3.1, rooted