This checker works for the smaller regional carrier that may show unlocked when in fact are not. Use this for those hard to find carriers typically located in the USA
Model: iPhone 12 Pro Max 256GB Pacific Blue [A2342] [iPhone13,4]
Serial Number: F2LFGUJGxxxx
Warranty Status: Limited Warranty
Estimated Purchase Date: 2021-04-29
Carrier: US CAROLINA WEST LTE BLOCKED POLICY
Country: United States
NOTE: Provided results depend on info available in Apple, Carrier or Source database.