I currently have the LG Sentio and have T-Mobile service. I was just looking through my phone out of boredom when I found the IM section. I was so tempted to use the MSN messenger so I could use it to IM some oversea friends instead of texting them (and suffering the costs of international messaging), but I then my plan came to mind and I began to worry. My plan includes shared minutes and unlimited domestic messaging. I DO NOT have a data plan (for internet and such). So my question is: Since I have unlimited messages, would using MSN on my phone be free or would I be charged for it anyway?