s4 i9505 no 3G data only 2G edge

i recieved Samsung Galaxy S4 GT-i9505
phone problem is that its data working only On 2G GPRS/Edge .
i tried to chage network WCDM mod , and all other mod
phone firmware version kitkat 4.4.2
i flash with 5.0 lolipop but still same problem no 3G
please what should i done next guide me