issues like "Invalid IMEI", "IMEI 00000000000000", or "Null/Null" usually occur after a bad firmware flash, a failed software update, or corrupted EFS partition data. Because the SM-J410F runs on a Qualcomm Snapdragon 425 chipset , repair methods rely heavily on specific service boxes like Ultimate Multi Tool (UMT) and its UMT QcFire module.

Locate the IMEI Repair configuration block. Check the box for IMEI 1 . Carefully enter the original 15-digit hardware IMEI found printed on the phone's physical rear label or original packaging box.

Tap 7 consecutive times to open Developer Options . Toggle the OEM Unlocking and USB Debugging sliders to "ON". Diagnostic Port Activation

: Magisk or a compatible custom recovery payload matching your specific binary version (e.g., U1, U2, U3, U4, U5). Phase 2: Device Preparation (Root & ADB)