I just recently bought a used 7100g on eBay, and I got a plan from AT&T. I don't have a data plan for it, and every IM application I can find is only usable if I have a data plan. I cant find any IM applications that use SMS (I have unlimited texting so I'd like on that uses SMS for IM) all I can find is ones that need internet. I heard that T-Mobile 7100t's have an IM client that uses SMS, and I was wondering where to get that kind of IM client, and where I cant get one. I found one called "OZ" but I apparently need use my BB's web browser to download it, but that isn't an option here.

Thanks for any help you can provide.