The machine is Passcode (password) or Disable (disable)
Insert the sim into the signal tester, carrier name
No need to install, just open the tool and do
Notifications, iCloud, iMess, Facetime work fine
MacOS Support from Mojave to BigSur
Copy ECID from LPro Boot Disk
No support
The machine has restored the Hello screen
The machine loses signal, hardware damage
Update machine from low iOS to iOS15 (because it may not be able to boot)
Tutorial
Backup
Put the device into DFU then press IPWNDFU
Click RamDisk
Click Check SSH (if there is an error, reopen the tool and click again)
Click Backup Activation
After the backup is complete, restore the device or delete it and then go to the next step
Restore
Put the device into DFU then press IPWNDFU
Click RamDisk
Click Check SSH (if there is an error, reopen the tool and click again)
Click Restore Activation
Download