an easy way:
.. upload apk to dropbox, drive etc.
.. navigate with the google broser on your phone to one of the tools mentioned before
.. log on
.. click to download
.. apk will be downloaded
.. Android will ask for installment and don´t forget to accept installment of apps not from the the Play Store bvefore
I just use the QR feature on PhonegapBuild's app page. Grab a QR code scanner from the playstore and it'll download the app directly to your device.
Correct! Tis is the other way to do it, but unfortunately sometimes it doesn´t work. Just tested again on Android "Lollipop". Nevertheless both ways are possible!