I know this sounds crazy and all, but since 20.1 dropped, my phone can't even hold onto weaker EVDO signals, call quality in my house has gone to crap on my friends 5S (not set up for WiFi calling), and overall signal levels have dropped remarkably.
I can't even leave my house without dropping EVDO within 2 blocks, and I really think it's the carrier bundle. Plus, it's nearly impossible for my phone to latch onto roaming. If Sprint doesn't expand service in Pahrump soon, I think I'm going to go crazy.