I'm currently on T-mobile but contemplating switching to Fi due to it being cheaper with our relatively low data use across 5 lines. I've been reading about the difficulties of handing off between networks and dropped calls. Does that still occur? We'd be using a combination of Pixel, Nexus 5X and Pixel 2 (when released) phones. At home I have to use a booster to a reliable T-Mobile signal as my house appears to be at the very edge of their LTE umbrella. I've not checked the Sprint signal as I've never had a Sprint phone in my house.