How to Determine if Android Device has Telephony Support

public static final String FEATURE_TELEPHONY was added in API level 7
The device has a telephony radio with data communication support.
Constant Value: "android.hardware.telephony"

1. Get a PackageManager Instance named myPackageManager.

2. Create a Boolean Variable named bolTelephonySupported

4. In the onCreate method, add the below code. This will return the telephony ability to a boolean named bolTelephonySupported. It will then display a toast displaying the telephony ability of the device to the user.

bolTelephonySupported = myPackageManager.hasSystemFeature(PackageManager.FEATURE_TELEPHONY);
if (bolTelephonySupported) {
Toast.makeText(this, "Device has Telephony capability", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "No Telephony capability!", Toast.LENGTH_LONG).show();

5. Compile and run!