Same here. Suddenly no service, "Mobile network not available". Tried restarting, reinserting SIM, etc. Have been on public for years with no change to phone or anything like that. Ottawa.
Same issue here on 3 phones... two in Ottawa, 1 in Peterborough, 3 different area codes on them. I don't really care because I hate talking to people but my wife and her dad are pretty sad!