I didn't change any firmware, just the language from Japanese to English. It's still got Japanese input and all the EMOBILE branding...I can't change the firmware from the phone.
The phone radio is unlocked, I can put any SIM in. The GPS is locked down, cannot use in Google Maps. Java is not installed, cannot use Opera Mini.
I'm at work on a WinXP machine and I can use ActiveSync properly and install programs. Doing the app-unlock thing now.