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i want a mobile application which will have one rotating banner on the top and will have two option for that. option 1 will have drop down list of categories. if user select any category and press ok then certain no of contact details will appear. user can send sms or call using that contact detail. in second option user can post any item for sale or search any available item for purchase.
i want it cross platform that is it should run on java, nokia, samsung, android phones.