Updated to 6.0.1 and all the sudden I am getting Unregistered network errors .. Rebooted several time also removed and replaced sim . When I go to manually select the network operator and select Koodo it says that it is unavailable and to try again later
Leave the SIM card in the phone and try turning off the phone completely for a minute or two. Power back on and see if that resolves the problem. Make sure airplane mode is not enabled and that your phone is set to a network type other than 2G/GSM, (e.g. LTE/WCDMA/GSM (auto) or WCDMA Only. ('Network type' options are found on the same page where network operator options are located).