Okay quick question on this EQO thing. I have a full data plan with At&t, unlimited browsing and 1500 text messages. My question is does this program (using it for MSN messenger only) use my text message allowance?
EQO sends a small amount of data over the Internet to set up your calls, send text messages and allow you to chat on your favorite IM networks. In order to do this, your phone needs to be able to access the Internet. This is commonly referred to as "having a data plan". You likely have a data plan if you frequently do things like surf the net using your mobile browser, download music, games, etc. If you are not sure if you have a data plan on your phone, contact your mobile provider.
EQO only uses a very small amount of data to make calls (in fact, only a few bytes) but your phone needs to be able to access the Internet to use EQO. You can ask your mobile provider what your data/Internet plan options are.