Didn't know there's a 5800XM thread! I love my phone! But it's still vanilla; original RM-356. Have a couple of questions.

1) I have a lot of songs in the phone, but unreadable fonts due to it being Chinese characters/Japanese characters. Any way of adding new fonts for them?

2) Hacking the phone brings benefits like better performance and a better GUI, from skimmed reading. From the *#0000#, it says my software version is V51.0.006. I'm assuming I can't hack it right? If it's possible how? First post had a lot of info but kinda messy...just need someone pointing me to the right direction.

I flashed quite a number of BIOSes and firmwares on computers, hardware, handhelds, consoles and engineering applications. Confident isn't a problem for me .

Anyway, thanks for pointing somewhere. In regards to question two, any way of downgrading the firmware to V40.x.xx? I assume not. So, with my firmware is still possible then?