Help with Sprint TP2

[bossb2525]

Greetings all,
Unfortunately, I'm new to this unlocking stuff and probably jumped the gun on unlocking this phone before it was activated on the Sprint network. Here's my story, I bought a Sprint Touch Pro2 off of eBay brand new because I heard it could be used on the AT&T network. I used the unlocker from htc-unlocks and, although the phone now connects to the AT&T network, I'm unable to use it I guess because the phone has not been activated. Is there a way around this? Also, I noticed the phone can detect a wifi network but when I open the opera browser on the phone it asks me to enter a Sprint phone number. Is there anyway around this also? Sorry if this is not the proper place to ask but if someone could direct me to where I could find the answer I would appreciate it! Thanks for your time!

UPDATE: Phone is now working on AT&T! Thanks everyone for your help. Now I am curious about some other minor things. Is there anyway to make the "Hands free activation" page go away? Since I don't need to get it activated, it's just kind of annoying (but a small price to pay in order to enjoy a great phone). Also, how can I configure my web browser to connect only to my WIFI so I don't get charged if it tries to connect to the Edge Network? Thanks!