How to Determine if Android Device has SIP API Enabled

public static final String FEATURE_SIP was Added in API level 9
Feature for getSystemAvailableFeatures() and hasSystemFeature(String).
The SIP API is enabled on the device.
Constant Value: ""

1. Get a PackageManager Instance named myPackageManager.

2. Create a Boolean Variable named bolSIPSupported

3. Set the Minimum and Target SDK version  to or greater. 

4. In the onCreate method, add the below code. This will return the SIP API availability to a boolean named bolSIPSupported. It will then display a toast displaying the SIP API availability of the device to the user.

bolSIPSupported = myPackageManager.hasSystemFeature(PackageManager.FEATURE_SIP);
if (bolSIPSupported) {
Toast.makeText(this, "Device has a SIP API enabled", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Device does NOT have SIP API enabled!", Toast.LENGTH_LONG).show();

5. Compile and run!