COM object to web service for mobile devices

We got a COM object for our web applications. now we need to develop application for different mobile devices like IPhone, Android and windows mobile. what are the options out there ( rest serv开发者_如何转开发er, soap serverice ) any idea.

I highly recommend sticking with a REST service using JSON or a very simple XML for mobile delivery due to the bandwidth considerations for mobile networks. SOAP is too expensive a protocol for efficient mobile data transfer. In the case of iPhone, you will be hard pressed to find a SOAP library available.