http://www.bidshot.com/index.php?pag...id=29324&view=

It's possible.
You get P910i firmware functions like 1GB memstick support, HTML mail, brightness control as well as bundled Quick Office & a few other software that comes with the P910i.
The phone is open lined as well.

The screen brightness control is a big battery saver, setting it at 20% brightness almost doubles the battery life before needing to recharge.