Just updated my Galaxy S6 OS, phone is now useless. Cannot send or receive calls. When I try to call out, I receive the message, "The number you have called is not assigned." When I try to call in on my wife's phone, call just dies. Cleared cache partition, no dice. Tried a factory reset, no dice. Disabled LTE, no dice. Help! I need my phone for work!
Same Issue with the Samsung Galaxy S6 with Fido. I had that problem the first time they rolled out the 5.1.1 update. I can't receive text messages or calls when it switches between 4G and LTE network I noticed at poor locations where its not a steady LTE connection, But i can still call out and text out. I brought it to Samsung repair shop and they downgraded the version back to 5.0.2 and they said it was a bug. Updated it again on Oct 10 and it had the same issue, i'm guessing Samsung didn't fix the problem the first time. The other solution is to go to settings -> mobile networks -> Network mode and select GSM/HSPA.I also disabled VoLTE in Settings -> Applications -> Phone -> VoLTE -> Do not allow VoLTE calls. But lets face it this is a temp fix for now until Samsung fixs it. I guess we will have to ride it out until a patch or Marshmallow gets released.
F.Y.I: You will be stuck on 4G and lower network connection on this setting. this just disables LTE.