there can be many ways to deploy app on phone.. 1. by launching a beta version of the app and giving microsoft account of the people you want to send it. it will be a 90 days trial and then app will be removed. while this you can also update your app for testers.
- by using SD card. put your xap in sd card and then deploy on phone ...
here is the link which might help you
http://msdn.microsoft.com/en-us/library/windowsphone/develop/ff402565(v=vs.105).aspx