If your phone had a MediaTek chipset, standard tools like or Maui META would work. However, because the J410F is Qualcomm, those are less effective. For general null IMEI issues on other MTK phones, restoring a backup of nvram.bin and nvdata.img via SP Flash Tool is the common fix.
If this happens, your NVRAM/EFS partition might be corrupt. You may need to flash a stock firmware and repeat the process.
Verify that your physical UMT Dongle or Box is securely connected to the computer. j410f imei repair umt
Modifying calibration data exposes the phone to a potential permanent brick if structural files become corrupted. Creating an isolated backup ensures rolling back remains possible. Launch the application on your desktop. Navigate directly to the Read & Tools tab interface.
The software will interface with the phone in EDL mode, extract the critical security structures ( EFS , MODEMST1 , MODEMST2 ), and save them locally as a backup file. Store this file safely. Phase 3: Writing the New Calibrations and Patching If your phone had a MediaTek chipset, standard
: Download and install the latest desktop iteration of the Qualcomm flasher tool.
: The device must be rooted for the tool to write to the EFS partition. ADB Enabled Settings > About Phone Build Number 7 times, then enable USB Debugging in Developer Options. Original IMEI If this happens, your NVRAM/EFS partition might be corrupt
Complete Guide: Samsung J4 Core (SM-J410F) IMEI Repair Using UMT Dongle
Select the brand () and the model ( SM-J410F ) if available. If the specific model isn't listed, many technicians use a "Generic MTK" or "Meta New" method. 3. Input the IMEI Details Select the IMEI Repair option.
Click . The tool will communicate with the device via the Diag port to update the IMEI. Patch Certificate (If Necessary)
[PC Link Mode] ---> [UMT QcFire Module] ---> [Read EFS / QCN] ---> [Secure Directory Store]