My phone show No service please Help!!!

I checked the coverage and it show it works at my area (Quebec Sainte adele), but I put the sim card in my iphone 7 plus that's unlocked, but the top of the screen keep showing No Service, I waited till today and see if it work, but it still no service, even I went to montreal downtown and still no service.
I also try to find the chat bubble, but after click it, nothing show.


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