AT&T: Call 1-800-331-0500 or fill out an unlock request online at https://www. att. com/deviceunlock/#/. Sprint: Call 1-888-211-4727 or go to https://sprintworldwide. custhelp. com/app/answers/list and click on the “Chat” tab. T-Mobile: Call 1-877-746-0909 Verizon: Call 1-800-711-8300 and ask for a SIM unlock.

File a complaint online at https://consumercomplaints. fcc. gov/hc/en-us, or call the FCC at 1-888-225-5322. [2] X Trustworthy Source Federal Communications Commission Independent U. S. government agency responsible for regulating radio, television, and satellite, and phone communications Go to source