How to detect if device is capable of calling and messaging

Question

Some devices ie. Galaxy Tablet 10.1 can only send SMS, but cannot call. Some other devices like Asus Transformer don't even have SIM card.

How can I detect if device can makes calls? And how can I detect if device can send SMS?

Answer 1

Using this technic you can test all sorts of things too e.g. compass, is location available

    PackageManager pm = getBaseContext().getPackageManager();
    pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY);