[Q] HELP!!need pit file (SM-G3815)

[terminal23]

Hi i got a brand new galaxy express2(sm-g3815) unlocked it via IMEI and now i dont have internet connection,i tried to set APN and everithing is ok but still no data connection...in the past happend the same to me on SG s3 mini and flashing nee firmware with partition ticked solved my problem but noe i can't find the PIT for my device(sm g3815)thanks in advance!!