I was a bit surprised when three people asked me how to do this in one day. I figured if there was enough interest in it then maybe it deserved a post of it’s own. Basically you want to know the primary phone number of the device your app is running on. In order to do that in PhoneGap you will need to write a plugin to access the TelephonyManager service on Android.
As always the code for this plugin is is GitHub at myTelephoneNumberPlugin repo. If you’d rather have a more detailed walk through please read on.
Full source at Simon Mac Donald