I need someone to write a program into a pocket WiFi device (ie. a device that can take a SIM card and broadcast WiFi signal) such that a smart phone must run my own mobile app to access the pocket WiFi's data stream. It is similar to a VPN but any access to via the smart phone must be done with my own app running in the background.
something that can be compatible with Android and iOS. It shouldn't matter because WiFi protocol is the same for both platforms (ie. my router works for any smartphone). However, I need you to write some very simple program on both platforms so that I can test your product can work on both platforms.
How long do you think it will take? And can you give me a quick proposal of how you plan to implement this?