Hard Reset via Recovery — BLU J4
Optimized for J4 (Android 8.1 Oreo (Go edition))
Factory Reset from Settings — BLU J4
Optimized for J4 (Android 8.1 Oreo (Go edition))
Enter Recovery Mode — BLU J4
Optimized for J4 (Android 8.1 Oreo (Go edition))
FRP Bypass (Google Lock) — BLU J4
Optimized for J4 (Android 8.1 Oreo (Go edition))
Why reset your BLU J4?
A hard reset on the BLU J4 fixes boot loops, forgotten PINs and persistent lag. The method above will wipe the device back to factory condition. Always back up your data first, as a reset cannot be undone.
Frequently asked questions
Will a hard reset delete everything on my BLU J4?
Yes. A hard reset (also called a factory reset) erases all apps, photos, messages, and accounts, returning the BLU J4 to its out-of-box state. Back up anything you want to keep before starting.
Does resetting the BLU J4 remove the SIM lock or carrier lock?
No. A hard or factory reset only clears data and settings — it doesn't remove a carrier/SIM lock, which is tied to the device's IMEI at the network level. You'd need to contact your carrier for an unlock.
How long does a factory reset take on the BLU J4?
Typically a few minutes, though it can take longer on older or heavily used devices as more stored data has to be wiped.
Will I need my Google account password after resetting the BLU J4?
Yes, if Factory Reset Protection (FRP) is enabled. Android (and HarmonyOS 2.x devices with Google services) will ask for the last signed-in Google account after a reset — make sure you know that password first.
Does my BLU J4 have a hard reset button?
Not a single dedicated button — the BLU J4 uses a button combination instead of one labeled "reset." See the Hard Reset section above for the exact keys to press.
Can I factory reset my BLU J4 without the password?
Yes — resetting through recovery mode doesn't require your lock screen password, since it bypasses the login screen entirely. That said, Factory Reset Protection may still ask for your Google account credentials afterward as an anti-theft measure.
What is recovery mode on my BLU J4?
Recovery mode is a stripped-down menu outside the normal operating system, used to wipe data or apply updates when the BLU J4 won't boot normally. See the Enter Recovery Mode section above for how to reach it on this device.