Checks ESN Clean/Lost Status for devices on T-Mobile USA network. If blacklisted by T-Mobile, you will also be given the reason (e.g. unpaid bills).
Sample:
Case 1: Clean
IMEI: ###############
Model: Apple iPhone 6S (A1688)
ESN Status: CLEAN
Case 2: Unpaid Bills
IMEI: ###############
ESN Status: BLOCKED
Blacklist Reason: Blocked for non-payment
Blacklist Date: 04-22-2019
Case 3: Insurance Claim
IMEI: ###############
Model: Samsung SM-G930T
ESN Status: BLOCKED
Blacklist Reason: Reported unrecoverable by insurance
Blacklist Date: 03-14-2017
Case 4: Lost
IMEI: ###############
Model: Apple iPhone 6S (A1688)
ESN Status: BLOCKED
Blacklist Reason: Reported lost by a T-Mobile customer
Blacklist Date: 04-03-2019
Case 5: Stolen
IMEI: ###############
Model: Apple iPhone 7 (A1778)
ESN Status: BLOCKED
Blacklist Reason: Reported stolen by a T-Mobile customer
Blacklist Date: 08-14-2018