UDP connection speed problem in c#

we have a remote desktop connection program and we are sending data in byte array using UDP connection application function 1. clients are connected using server (multiple clients unlimited) 2. data sending and receiving via UDP connection(multi threading) our problem we are not able to send more than 64kb per second in 2mbps internet speed your work you have to fix it and increase uploading and downloading speed minimum 500kb per second in 2mbps internet speed note: solution must have to compatible with iOS/Android/Mac/windows