Our office in the California Sierra Nevada mountains is connecting through AT&T and Verizon. There are a couple of towers through which we connect, usually one at the Flying Spur Ranch (shared by the two carriers), and the InControl map locates them accurately.
However, lately InControl places the connecting tower elsewhere altogether (in Nevada).
Carrier: Verizon Wireless
Strength: -65 dBm (Excellent)
Quality: -12 dB (Good)
Carrier: AT&T Wireless Inc.
Strength: -88 dBm (Excellent)
Quality: -11 dB (Good)
Is this something I can expect to self-correct after a while?