A: No. If you update via Settings > General > Software Update, the custom modifications are overwritten, and the carrier lock returns.
A: Your baseband did not flash correctly. Re-run the process, or downgrade to iOS 14 using a signed IPSW. unlock hub iphone 7 plus custom ipsw download
idevicerestore -c "Unlock_Hub_iPhone7Plus.ipsw" Note: You cannot use standard iTunes for custom IPSW files. Re-run the process, or downgrade to iOS 14
If you are looking for the to get free, permanent 4G/LTE on T-Mobile or Verizon— stop now. It does not exist. It does not exist
Disclaimer: This article is for educational purposes only. Modifying iOS firmware violates Apple’s EULA. We do not host or provide links to custom IPSW files. Proceed at your own risk.
A: No. That is a separate issue (Activation Lock). This article is about carrier lock. Do not confuse them.