[tsac]

Not sure what your carrier is but if T = ATT then you wont be able to get 2g service. ATT and others are dropping the old technology in favor of the new radio bands to squeeze more on the bandwidth.
Why do you want 2g service? Other than building penetration due to radio frequency not much different than 3 and 4g service. With the new phones and lower power radios in them it's best to stay with what's available.
If your not getting service then either call the carrier or switch to a provider that covers your area.