How can i change my t mail e mail on my sidekick after i already made one?

I got the sidekick and i put my name i want to cahnge it to some thing cool but i don't know how to cahnge my email off the sidekick.

How can i change my t mail e mail on my sidekick after i already made one?
You have to call customer care to request a change. That's the only way. Make sure you know all the security question answers, because you'll need them.