VPN app for android -- 5

I need VPN client for Android that will use the built-in PPTP client to make a connection to our PPTP server. It must be identical to our existing non working APK which is attached to this project named signedVPN_APP. Here are the features needed: A-User will be asked to enter username/password or if new to REGISTER. Once the app started. Then will take them to a menu page; the menu page will show: 1-My Account 2- Renew 3- About Us 4- Connect ( to connect VPN) B-Registration page will have: username, password, email address, I will provide the registration page in php. C-preconfigure VPN will be stored and user will have an option to connect to. D- User will be able to connect/disconnect the VPN manually on the VPN page. E-Connection will stay alive even if phone goes to sleep unless if VPN is disconnected manually or the phone is turned off. F-You will submit to google play including icons and everything. G-I get the source code. H-I will set 3 milestones: 1- I will create and release 15% at the initial start of the project. 2- I will create and release 42.5% AFTER the app is uploaded and tested by me to Google play. 3- I will create and release the remaining %42.5 AFTER I get the source code.