[Q] Activating GT540 with T-mobile SIM, No activation code

[pinkhearts777]

Hi there guys, my new phone arrived in the mail today yay!
However, I totally forgot how to activate the SIM! These unlocked phones do not come with any activation codes for T-mobile and T-mobile asks for it to activate online. How do I bypass this? I'm sure I found the answer somewhere but I can't remember.

Here's what is asks for: http://www.t-mobile.com/shop/plans/ActivateCodes.aspx

Please help! Thanks!