guys I think we are all missing the point: the Rosh Yeshiva considered someone who is having an iPhone in defiance of the call of the rabbanim to get rid of them as someone who defies the poskim and has placed himself out of normative good standing. He did not want such a person as an eid. It could have been anything the fellow was doing that flouted torah norms. Its not about the iPhone.
(You may argue that the call to get rid of all our iPhones is anyhow not being heeded or that it was based on inaccurate information or whatever. The point is that the Rosh Yeshiva did take it seriously)