ok, i'm confused. I've read that BIS 2.5 allowed push AOL & Hotmail and did not require 4.5 software upgrade. Also, i assumed that meant you didn't have to pay the $20 for the Plus account. can anyone clarify?
With 4.5 O.S. and BIS 2.5 you can have your hotmail pushed free. If you don't have either and signed up back when they first started hotmail basically then you don't have to pay and can add it, otherwise its like $20 to get it. AOL I'm not sure since I don't use it. I have a beta 4.5 and now I'm able to get my hotmail.
As for messenger I have always had it since I bought my Curve.