You can no longer recover your lost, stolen or damaged MTN line online as this service has been discontinued. SIM swaps are currently only done offline.
How to do a Welcome Back / SIM swap on MTN
Visit an MTN office or service center and request for a Welcome Back on your line. The following will be required:
* A valid Government issued I.D card (International passport, Drivers license or Voters card)
* The SIM pack of the previous line (containing the PUK number)
* ₦150 for the new SIM card you'll be getting
* 6 numbers you had been calling frequently on the line