[cbgant5]

I do not want my signature on my work email to say "sent via blackberry" - I am on TMobile - how do I change it?

[jlsparks]

Login to your carrier's BIS page =http://www.t-mobile.com/bis/

Select the account you want to change and hit Edit. Edit the signature to whatever you want it to be.

[mininash13]

or (and this may be only in 5.0) but under email settings go to your email and hit edit and under one of the tabs is signature..