My iPhone is not letting me make phone calls or send text messages?

It was working just fine all day then suddenly it malfunctioned. Whenever I'm trying to call anyone, it is suddenly hanging up the call and is saying "call failed" and when I'm trying to send text messages, they are not going through. The Internet is working just fine.

Why is this happening? Is it a service problem? I'm with Fido. Or is the phone going haywire? It's an iPhone 4S. I've never had an issue like this before. My first time ever. I'm up to date with my phone payments too.

Same i'm on rogers its nation wide in Canada and text me

Rogers and Fido are out Canada wide. Search on a search engine, it will come up. Millions without Celluar Service.

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