Check above topic, post #15, 16 and 17. You have to call Rogers tech support and ask them reset your network line.
I have a Galaxy S6, originally from Virgin Mobile, then unlocked and now with Rogers. When I look for updates in the settings, it says that the latest update is installed. But I'm on v5.1.1... Is there a roll out delay for some users? Is there a way to force the update?