What is carrier lock and how to check it

A carrier-locked phone (also called network-locked or SIM-locked) can only be used with SIM cards from one specific mobile network. For example, a phone locked to AT&T will reject SIM cards from T-Mobile or Verizon.




Why phones are carrier-locked




Carriers often sell phones at a subsidized price in exchange for a contract. The lock ensures you stay on their network for the contract period. Once the contract ends or the device is paid off, the carrier may provide an unlock upon request.




How to check carrier lock status





1. Find the IMEI (dial *#06#)


2. Run a check on our IMEI verification tool


3. Look for "Carrier" or "Lock Status" in the results





Carrier lock vs blacklist — what is the difference?





• Carrier lock — device works only on one network; can often be resolved legitimately through the carrier


• Blacklist — device reported lost/stolen; blocked on all networks; much harder to resolve





Always check both statuses before buying a used phone.

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