How to change my number on iPhone 4?

I recently changed my phone number with Bell Mobility and on my iPhone 4 under my number it still says my old number. It won't let me change it under settings > phone > my number. My new number shows up when I make phone calls and text people but when I talked to Bell they said it should change in a couple hours but it's been 3.5 already…

Do a complete shutdown and restart

Give it more time and if not go back to Bell. You can't manually change your number from your phone

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