i bought a phone from a dealer in my city...its samsung s4 mini L520 with sprint ....its on 4.2.2 android with baseband as L520VPUAMK2(earlier it was on MI3...then i flashed the MK2 stock rom using odin)...i have used the ##786# to reset to factory also.i have made it ruim only using dfs....normal OMH is not working says "invalid sim".....micro REG series is working for voice and sms but NO DATA.....tried doing the MIP tweaking also by writing 1st active profile..still NO DATA....can anyone plz help me.