3G and 1x is missing

[staticmaal]

So I tried to add the thunder rom from the optimus s it worked but I lost my signal I can text and call but I can't surf the web I tried switching roms but out nothing didn't work. Any suggestions?

 

[Helgaiden]

wipe everything, return to stock (assuming you did a nand backup), then try again. Make sure you wipe dalvik, cache, and data (if you want to do a clean flash) just to be sure.

 

[staticmaal]

I went to stock and activated it again it worked