I am wondering a couple things about the messaging services on a phone like Yahoo and AOL for example.

If I log in to yahoo on my phone and then hit the end key instead of signing out of yahoo, does it continue to use my minutes? Or does it only use my minutes just when I am on the yahoo screen or messaging someone?

Also, if I hit the end key so that the yahoo screen is gone and it is just my regular screen, can someone still send me a message and if so, does something come up to tell me I have a message?

Thanks