Backup the corrupt IMEI file, open it with NotePad++ or other text editors.Note IMEI that is given below phone battery or phone box.Dial *#7284, select Qualcomm USB-settings and check MTP+ADB.For entire NV data backup, read phone with default values.Write backup directly to phone for IMEI backup. Save item 00550 with NV reader/writer.Connect the phone to the computer through USB, launch NV-items_reader_writer.exe as administrator.Samsung USB drivers should be pre-installed on computer and USB debugging should be performed on phone. Download NV-Items_Reader_Writer_Tool.zip.IMEI Loss during Firmware Update/ New Installation: Here since the device also loses root access, use ‘NV Items Reader Writer’ tool which has been tested on non-rooted Galaxy S3 and works well on other Samsung devices if you use the code to open ‘PhoneUtil’ menu. You can back up IMEI and restore it on your Samsung Galaxy Android phone. An IMEI data wipe can occur during firmware update, a wrong firmware installation or custom ROM installation, the last one being the most common reason. If this gets corrupted, you lose IMEI and cannot net-register. Why? IMEI data is stored separately in EFS partition on Flash memory’s root. Samsung devices running on Android have been seen to lose IMEI much more than other carriers. Amid several factors losing IMEI- international mobile equipment identity- is the top reason for connectivity loss. NV-items_reader_writer tool: A smartphone with no network connectivity makes no sense and if your phone isn’t registered to any network you’re missing out on the seamless functionality a net-connected smartphone could offer.
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