I have some questions regarding to buying: 1. do all iPhone models contain warranty ?nd if yes then for how much time? 2. do they support expandable memory? nd have dual sim? 3. how much time it will take delivery to india? 4. does it supports the real app store or google playstore Please reply asap.thank you Reply:1:18month warranty by us.dual sim verison support micro sd card,single sim not support.3: 2-3days by DHL 4：support apple store or google play store(optional)....