And... don't forget to to put a checkmark in the correct phone library in the Libs tab of the B4A editor. I can't tell you exactly which one, I'm not at my dev pc right now. If there is a lib called PhoneId, use it, otherwise use the standard Phone lib. You'll know you got the right one when you start typing 'As PhoneId' and PhoneId is in the popup list if available objects.
Cheers