How can i install all my apps in other phones at once I am an app developers , I also work on phones, How can i install all my apps into my customers phones at once. Instead of installing each one by one. 

is there a faster method through which I can install all 10 of my apps with one click?
AFAIK, there's no way to do this. Since every app installation should go through the Systems Permissions check regardless if the user is the same, if the device is different.

In order for the installation to proceed, the user of the phone MUST grant access to if first. This is a security matter and will always be applied.