Create app similar whatsapp + Viber

We want create app for voice calling and vedio calling Our budget is between 1500 - 2500 $ for 1 platform - But we want create this all platforms and softwars. So we are ready listen to your price offer ( Website - Android - iOS - Balckberry - Desktop Software in windows - Linux Software ) -- Admin allow us control in everything is happening 1 / safety features - Send feature activation code to user phone when he sign up. - Application Lock feature where the application owner can choose a password to open the application. 2 / features Shape - The main color of the application is light blue - Control feature full color in the application and change them when needed ( such as the application of Twitter ) - The user can edit the images by the application to add light or add name or symbols or Emoji in the picture etc...( Image filters ) 3 / Networking features - Make free voice call , Vedio call from the application to the same application or also from the application to an external phone number in every country in the world a certain amount of money (users are accountable for every minute or participation Monthly and from which to determine the number of a certain minutes depending on the value display) - Conference calls feature either audio or video (such as Skype ). - Know the advantage if the letter was written or audio read from the second party (Seen) can also know when the other user to start writing (such as the application of Viber ). - Save favorite messages messages feature. - Talk, whether audio or video while allowing send all kinds of files at the same time feature (such as the application of Viber ) - Allows the user to send all kinds of files, whether photos, video, or other files( PDF , Word Doc , Excel Doc, Zip files etc. As well as send voice messages (such as the application of Viber ) - Allows the user to send the symbols and free smilies ( Emoji ) or he can buy more symbols etc.. With money. ( In app purchase ). - Send faster Like (such as Facebook). - Voice Mail feature (such as Skype ). - Call History : The application keeps a record of all incoming and outgoing calls and non unanswered and is displayed in the Call History screen feature. - Online, offline / Last appearance: The last appearance for each user in the chat page display to reveal each user whether online now or when it was his last appearance (such as the application of Viber ). ) - Create groups and send messages to it immediately with the group control feature (such as the application of Whatsapp - Groups control feature through the individuals involved, such as changing the existing image and change the background. - Synchronize the phonebook (names): When you register or log in the application will synchronize your existing user names on his phone with a server application in real time (directly) and stored in databases revealed to the user are the ones who are using the application and add in a unique list in case the appearance of new user later (a new phone number) will be synchronized immediately and add it to the menu (such as the application of Whatsapp ) 4 / features language - Support for 15 languages where the user can change the language of the application (English - Arabic - French - German - Spanish - Italian - Russian - Japanees - Traditional Chinese - Simplified Chinese - Hindi - Turkish - Korean - Brazilian - Portuguese) ** Rights : - You could not sell the source code to any other party or where competition in any local competition, Arabs or international. - The programming team undertakes to write the code in accordance with international standards. - That the programming team with the best possible algorithms that are fast, efficient and less use of the resources of the phone. - The application on different operating systems platforms works 100%. - User could banned other user.