How can i unlock sim
I changed my network straight talk to Verizon,after that my sim was locked,could you guys help me to unlock my sim,thanks!
iPhone 6s, 14
It sounds like your phone is locked to Straight Talk. Only Straight Talk can unlock your phone to accept Verizon.
SIM not supported or locked to another provider
How to unlock your iPhone for use with a different network provider – Apple Support (UK)
The only way a SIM can be "Locked" is if you guess your SIM PIN wrong more than 3 times, in which case the provider needs to give you a PUK code, bit I don't think this is what yoy are asking.