The Samsung Galaxy J4 Core (model number ) is a popular budget smartphone, but like many devices, it can be prone to IMEI (International Mobile Equipment Identity) corruption. This often happens after a failed flash, rooting attempt, or a software glitch, leading to a dreaded "null IMEI" or "invalid IMEI" error and the phone losing connection to the cellular network. For technicians and advanced users, the Ultimate Multi Tool (UMT) is one of the most effective solutions to repair the IMEI on this Qualcomm-powered device.
Choose the execution method: or Diag Method (depending on whether you are using rooted factory firmware or combination firmware). Click the Repair , Write , or Start button.
A high-quality micro-USB cable to ensure stable data transmission. j410f imei repair umt
: Install official Samsung Android USB drivers to facilitate stable virtual COM port assignments.
Turn on the device and reconnect it to the PC with the Diag Port active. Verify in the Windows that under "Ports (COM & LPT)", you see Qualcomm HS-USB Diagnostics 9008 or similar. In the UMT QCFire interface, navigate to the QCN Tool tab. The Samsung Galaxy J4 Core (model number )
generally needs to be rooted for the UMT tool to write the new IMEI directly to the system partition. Use Magisk to root. installed UMT Software Link. Step-by-Step: J410F IMEI Repair with UMT Phase 1: Prepare the Device Root the : Root your
On Samsung devices, simply "repairing" the IMEI is often not enough to get a signal (it will show "Emergency Calls Only"). Choose the execution method: or Diag Method (depending
Use a pair of metallic tweezers to short-circuit (bridge) the two specified test points together.
Official Samsung Android USB Driver package properly updated in the Windows Device Manager.