Is there a problem in the Denver area? I've been on with very low signal to no signal. Data has been at 1x. Calls are either choppy or dropped. Has been since around 1pm and currently 8pm.
I have also been having this issue. About 75% of the time I cannot make or accept an incoming call due to low service. I've noticed it in several different zip codes including 80212 and 80227.
