The Gaining carrier while validating the details of the Plivo DID you wish to port out may reject the port for the below reasons:
When the address submitted on any of the documentation does not match the address of the owner on file at the current carrier.
Name or Signature mismatch:
When the person authorising the porting request does not match the name or signature of owner on file at the current carrier.
When the person authorized to make changes on the account is not the person who signed the Letter of Authorization (LOA). Resolve this by completing another LOA with the authorized person and resubmit the porting request..
Incorrect wireless PIN:
When the PIN provided for a wireless phone number does not match the one on file with your current carrier. This is only applicable to wireless phone numbers.
Incorrect service account number:
When the account number you submitted does not match the one on file with your current carrier.
Invalid BTN (Billing Telephone Number)
When the billing telephone number (BTN), a master number used to identify an account, does not match the one on file with your current carrier. .
To resolve this, obtain the BTN from your current carrier and resubmit the porting request.