Received an update to the 5.1.1 OS a few weeks ago, everything was good as it has been for the last 2 years. For the past 4 days I can dial out and receive the notification of a call, but as soon as it connects (as in they answer my call or I answer their call) the call is dropped and it says "mobile network not available". The network then reconnects within 30 seconds and everything is fine. I can access everything EXCEPT phone calls...can't call it a phone.
I have done 2 factory resets, cleared the cache, toggle airplane mode on and off, manual APN, manual selection of mobile network, nothing works from what I have found through extensive research of online forums. Went into the koodo booth and they gave me a new SIM, no change, still no phone calls. Tried to flash the last update onto my phone - I am already up to date. The koodo rep was stumped and sent me away with no answer except call Google (I have no landline, that's why I have a cellphone). Please help.