Hi there my family recently switched over from ATT and the main issue I am experiencing is whenever I’m indoors my reception on all my lines will drop to one bar. I live in San Francisco. I know these are places I have good reception before when I was with ATT. The places I went to recently are museums in San Francisco near the Golden Gate Park, buildings in the financial district, small restaurants in the Richmond area. Does anyone have issues with one bar signal they’re able to fix? Do you think it has to do with SIM cards ? If needed I can provide exact address to pinpoint the Issue.