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Android
In most android handsets, you can manually update the mobile number in the phone settings. If this option is locked or unavailable, please contact our customer services team who will happily assist you. Please note that this is aesthetic and should have no bearing on the number routeing from the SIM.
iPhone
In most iPhones you can manually update the mobile number in the phone settings under the 'phone' category. This is normally labelled as 'my number'. If this option is locked or unavailable, please contact our customer services team who will happily assist you. Please note that this is aesthetic and should have no bearing on the number routeing from the SIM.
If you have accessed any messaging apps before the port completed such as Google/Android Chat, Whatsapp, iMessage among others; you will likely need to update the mobile number that is assigned to the service. This is likely to be necessary as the app may pre-register with the original mobile number for the SIM card instead of your newly ported number. You can update this in the app settings and is not something caused by your 1pMobile SIM or service.