OK, I may know all there is to know about Palms but when it comes to Windows Mobile I'm truly stupid. I need some pocket pc peoples' help here.

I have an Audiovox 6600, Sprint branded, that I seem to have screwed up. I was playing around with ROMs & PRLs a few months ago & now the phone can't find the Sprint network. I tried flashing a ROM that enabled the EVDO radio that's disabled in the official Sprint ROM. It worked initially but I kept having data connectivity problems so I reflashed it back to stock. Didn't work too well. I've tried reflashing both the ROM & PRL repeatedly to no avail. Any advice? I love this thing & I really want to use it again :/