for the record, just because the device is PTT doesnt make it iDEN. there have been several PTT blackberrys since the 7100i, none of them are on iDEN. keep in mind that Sprint also has their PTT (Ready-Link). They are also working on qchat and wi-max so it is entirely possible *if* this info is what they are going to do, that it will not be on the iDEN side.