Necessary Files
01. Odin v3.07.zip;
02. GT-i9500 fix_imei_null.zip


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Open Odin
Extract the. ZIP file, place the file in PDA [the phone has to be switched to Download Mode]
Press START
End.


That's it, simple steps to retrieve the IMEI of S4, damaged by trying to change the imei with another model.

Note;If after these steps the imei still null/null then the problem is hardware,this tested on 2 phones with imei null,after write this file the imei back to original

Download Link:

Samsung galaxy s4 imei repair :http://upfile.mobi/509320

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