Avoid all “custom IPSW iCloud unlock top” tools. They are either scams, malware, or temporary workarounds that fail after a reset. The only reliable solution is Apple’s official recovery process.
The only guaranteed and permanent way to remove Activation Lock is through Apple. Documentation Needed: custom ipsw icloud unlock top
If you ignore all warnings and want to try a custom IPSW on an , here is the process (and why it fails on newer phones): Avoid all “custom IPSW iCloud unlock top” tools
The concept of using a (iPhone Software) to bypass iCloud's Activation Lock is technically rooted in legacy jailbreaking methods, but it is largely considered a scam for modern devices. custom ipsw icloud unlock top