[Q] No data/MMS after flashing wrong ROM! topic

Hey guys,

So I flashed a stock N9005 ROM to my USA (US Cellular variant) Note 3 yesterday. There was an Aroma installer asking me to pick my CSC. Not sure what it was, I clicked a random one because it was necessary to continue. After flashing back to AOSP, I now have no data and cannot send outgoing messages! Instead of US Cellular, my carrier now says "30000". Any suggestions!? Thank you so much and happy New Years!

-Declan