Unlock iPhone bought through Best Buy
I bought an iPhone 7 Plus through Best Buy and they said it was unlocked and the box even says it will work on CDMA or GDM networks. I used it on T-Mobile and now it seems it has been locked to T-Mobile and they cant unlock it because I did not buy it from them and Best Buy is not much help. My Verizon sim will not work at all nor will any other Verizon SIM. Am I stuck with a 1000 dollar paper weight? Thanks.
iPhone 7 Plus, iOS 10.3.2