Here is 4.4.2 Modem File - Download
Here is Kitkat 4.4.2 Root Tool - Download
Here is GT-G7102 QCN File - Download
How to Repair ...!!
Do Root the Phone[SuperSU] First ..
Next Write the Modem[4.4.2] File using Odin3_v3.09 ..
Next Do write QCN File by Z3x ..
After write You can Repair IMEI [If need] ..