I'm trying to invite someone to join my Family SIM plan but keep getting an error

Start by checking all the details are correct.

  • Check the surname and postcode - they have to match the details of the person who pays the bill for that SIM
  • Make sure you've got the right phone number for the person you're inviting. They may have changed numbers
  • Check the person you're trying to invite is actually a BT Mobile customer. If not, all you need to do is order them a new SIM

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