iPhone 15 bought new unlocked from Apple goes SIM locked
Hey All - I bought a brand new iPhone 15 unlocked from Apple US website. Used only with Mint mobile close to ~9 months. Trying to switch to Google Fi, ESim activation failed. As part of troubleshooting I backed up the phone erased everything, tried to activate Google Fi. Esim activation still failed. I restored my phone with the backup now the Carrier lock indicates “Sim locked”. Spent hours on call with Apple care and they pushed me to mobile carrier support. Carrier is saying they don’t have any lock on this phone. Frustrating, stuck in limbo now with a useless iPhone 15 that is SIM locked and no one is taking responsibility to solve this issue.
Any suggestions how this can be resolved also where can I officially raise a complaint on this issue?
Thank you!
iPhone 15, iOS 18