Idk if it is the towers in my area, but I have one bar in an area that is usually full service, also in another nearby city is the same result. A friend has a 3g phone and he has 4 bars. The towers are said to be updated to 4g within the next 2 months, but I don't know if that would affect my service, last night I had all bars on a stock TW setup.
On the 2/21 build.
Tapin' the Talk on GNote ii
Cm reports the signal differently.