carriers and handset manufacturers have absolutely no incentive to make this happen. a market for phone theft insurance exists already, and the ability to disable a stolen phone would arguably reduce the number of phones providers could vend to a specific customer. District attorneys enjoy taking up cause celebre things like 'phone kill switches' because its an election year for most of these guys. rampant theft of the most coveted cellphones is a side effect of the philosophy of futility. That the very idea one might lose their bugati, prada, or iPhone is not only understood, but actively encouraged by advertisers subconsciously as a selling point of the product. exclusivity, social inequality, and elitism are all parts of the culture of conspicuous consumption we've all agreed are acceptable, nay, even ancicipated.
the effective solution is to keep expensive personal electronics secured on your person or away from view in questionable or dangerous areas and situations, or simply stop keeping up with the joneses and start buying something practical and affordable.