Downloading and using an EFS file for a Samsung SM-G532G (Galaxy J2 Prime)

or various Samsung service tools (often requires root) are designed specifically for IMEI repair and EFS restoration. Restore from Backup : If you previously created a backup using TWRP Recovery or an app like Samsung Tool

Are you currently experiencing an "Unknown Baseband" or "Null IMEI" error on your device?

. This can sometimes rebuild a corrupted partition if the core files are still present. Repair Tools : Specialist software like EFS Professional

may temporarily restore network function but can cause illegal IMEI conflicts or certificate errors Recommended Recovery Methods

: EFS files are device-specific. Flashing an EFS file from a different