Remove the sim card, and memory stick before doing this.
1. Go to www.wotanserver.com and find your phone on the front page.
2. Purchase a credit. £4.99
3. In the side panel of the website there is a link to download the usb flash drivers.
4. Download them.
5. Turn off your
K800i and hold C.
6. If you havn't already installed the usb flash drivers, install them.
7. Open WotanServer.
8. Enter your Username and Password you recieved by e-mail.
9. Click Start/Connect, i can't remember which!
10. It will connect, you can release the C button now.
11. Select the firmware you want, then the CDA (if you want it unbranded select "europe_2". That is Generic.
12. Click continue and it will take 5-15 minutes depending on your connection speed.
13. When it has finished, unplug the cable, remove the battery, wait 10 seconds and re-insert it.
14. Turn your phone on and you have an unbranded
K800i, I have done this myself. I HATE vodafone!
As for unlocking, i can't help you on that one, sorry!
Good Luck
Fattail95