Many of Apple's core services may stop working correctly. This includes iCloud, iMessage, FaceTime, and Apple Pay. You may also experience unreliable cellular data, dropped calls, and issues with push notifications.

If you download an IPSW from an "unlock hub," you are still getting Apple’s original code. The "unlock" comes from how you use the file —usually by exploiting vulnerabilities (jailbreak) or by using official IMEI unlocking methods.

Standard iOS firmware includes built-in protections designed to safeguard personal data and maintain the integrity of the device's encryption. Custom or modified IPSW files often remove these security layers, potentially exposing sensitive information to unauthorized access or malicious software. 2. Device Stability and "Bricking"