I've been running EF02 since it leaked, and everything worked great for a while, then all of a sudden, the phone rebooted at one point, and after that, I had no radios. I re-flashed the EF02 modem, and everything started working. Since then, I've had to re-flash the modem several times to restore connectivity. I've since flashed the EC05 modem, which seems to be working fine with the EF02 GB ROM.