Write an Android application

We would like a mobile application that would run on android, blackberry , iphone and windows phones with the following features: -When installed it access phone contacts and store the phone numbers in a database. -It checks the phone numbers and sends sms using an sms gateway to phone numbers that do not have the application informing them to download similar to whatsapp. -Users choose three groups to become a member of after downloading the application similar to 2go. -The groups are in hierarchy, Groups 3,4,5 are under group 2 and group 2 is under group 1. -The site administrator can create as many level 2 groups as he wants and as many level 3,4,5 groups as desired. -Each group is associated to a parent group except group 1. -The administrator sends information updates to all users just like cnn or bbc android app. but each information can be directed to a particular group. -users can vote on an opinion poll. each poll can be limited to a group level.