No Data Or 3G After Rom

Hi I have a Samsung Galaxy ace 2 and i have flashed a rom i was running Android 5.1 And i have not had any data connection siance i used CWM Repated to get internal storage from my sd card i have tryed using odin and Flashed JB And GB I am Useing The BTU Verison Of The Ace i have read other peaple haveing this issue i have also tryed using a pit and My Imei shows up and my network but It No Service and can not connect to the network any help will be good Thanks

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