[android-developers] Is it possible to make an app choose a particular APN automatically?

Is it possible to make an app choose a particular APN automatically? Or at least direct the user to the APN selection screen? Also I've been wondering, can an APN be used from any cell provider? Let's say I have two providers: A and B, can I use APN-B within A ? Thanks beforehand -- You

[android-developers] Is possible to determine which service providers available ?

Hi, Could anyone direct me to the APIs which allow to figure out through roaming which service providers available and what are they're capabilities? Also, is it possible upon a call action to launch a custom intent, let's say a voip app such as sipdroid? I'm quite new at this and just trying