Will the Android data (T-mobile) work on a T-mobile / Unlocked Blackberry (Any)

I pretty sure it was asked before but I am able to find any thread on this...
Basically I have an android galexy s and I pay 20$ a month (Its the preferred cutomer loyalty price... same as the 30 dollar plan). I want to get a blackberry just for its BBM, but I want to swtich the phones around I dont always want to stay with the blackberry since the vibrant is my favorite phone... So can I have the same plan (Since they are both on epc.t-mobile.com) on blackberry for everything to work?

If not what about an unlocked blackberry (att or something)

No you need a specific blackberry plan for it to work correctly. You will not be able to access any BIS features and blackberry messenger i75 one of those features.

Posted from my CrackBerry at wapforums.crackberry.com

Android needs the Android feature, Blackberry needs the Blackberry feature. You can't use a Blackberry with the Android feature and it will not connect to BIS.