What an IMEI format check can tell you
The checksum can catch some typing errors; it cannot prove ownership, identify blacklist status, show the current carrier lock, or reliably identify a handset model. Those results require an authoritative IMEI/TAC lookup source that is not connected yet.
Find the IMEI
Dial *#06# or open Settings โ About on your phone. Only enter an IMEI for a device you own or are authorised to check.