Wi-Fi, Bluetooth, Camera, Music, Local games, GPS. What doesn’t: Cellular calls (unless you re-activate), iMessage, FaceTime, App Store sign-in.
As of this writing (2025), the iPhone 4s on iOS 9.3.6 remains fully bypassable via hardware exploits. But expect more App Store restrictions. Avoid signing in to iCloud after a bypass – it may re-lock the device. Iphone 4s Ios 9.3.6 Icloud Bypass