How to create a Windows Live account on your mobile phone
If you don't have a Windows Live account, you need to set one up and activate it on your mobile phone to be able to install apps from Marketplace. First you need to set up your mobile phone for Internet.
Slide your finger left on the display to find Xbox LIVE.
Press join Xbox LIVE or sign in.
Press sign in.
Press create one.
Press the field below "Windows Live ID" and key in the required username.
Enter the password
Press the field below "Password" and key in the required password.
Press the field below "Re-enter password" and key in the password again.
Enter e-mail address
Press the field below "Primary email address" and key in your e-mail address.
Press the field below "Country/Region".
Press the required country.
Enter date of birth
Press the field below "Date of birth".
Follow the instructions on the display to key in your date of birth.
Press the confirm icon.
Return to the Home screen
Press the Home key to end the session and return to the Home screen.