I'm on verizon and have been using my pixel xl for a few days and no call quality/signal issues so far. Coming from a Nexus 6p and also carrying a Samsung S7, my observation of the signal quality of the Pixel is that it beats the Samsung S7. Recently I was in a place with limited signal. The S7 wasn't getting a signal at all and the Pixel was able to get a signal periodically. When I carried the 6P and was in a similarly challenging environment, the S7 was my go to for the excellent signal reception I got with it. Now the Pixel beats it, so far. I'm very pleased with the Pixel.