Q: Imassege and face time doesn't work

Hi this is Dr Shabd

The only and easiest way is

1-Go to Setting - Switch off the Face Time

2-Go to Settig - Switch off the iMessage

3-Go to Setting - General Settings- Reset Network Settings

4 - Go to Setting Switch on FaceTime - Sign in with your existing Apple / iCloud ID

You can see the Mobile number is changed now.

For more queries do write me or Whatsapp me.

If your iPad is jailbroken, there are more things that will break.

You do not get support for jailbroken devices in this forum.

Read this:

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