You pay a service (like DoctorSIM or DirectUnlocks ) to whitelist the IMEI in the carrier database. Best for: Removing carrier blocks. Pros: Safe and permanent.
He launched the companion app on his cracked MacBook. The terminal spat out a string of hexadecimal handshakes, then a prompt: [SIBYL v2.4] Device detected: iPhone 7 (Global). Baseband: MDM9645M. Current IMEI status: INVALID.
Many free "IMEI repair tools" on YouTube are actually malware or scams designed to steal your login credentials. Never download a random .exe file promising to generate a new IMEI in 2 minutes. Legitimate tools require a paid hardware box (Dongle) because Apple encrypts the Baseband firmware using a 2048-bit RSA key—you cannot change this with software alone.
Leo disconnected the phone, held down the power and volume-down buttons, and watched the Apple logo appear. When iOS booted, he opened Settings > General > About.