Forum Thread: Missing Calls and Texts, WiFi Drops Intermittently - Sprint Samsung Galaxy S3 4.3

Started having problems with my Sprint S3 recently (no root). People try to call and get sent straight to voicemail. No missed call notification is displayed on the phone. Also, some texts don't come through right away and later on they come through multiple times. WiFi connectivity is also fishy... I didn't have any problems before the 4.3 update. I have tried the ##72786# network profile reset with no change in status. I have also tried the #0011# wifi power save disable. No luck.