Beside this, why is my iPad ringing when my iPhone gets a call?
Apple introduced a new feature in iOS 8 called "Continuity" that allows users to answer and make calls on any iOS device connected to the same Wi-Fi network as their iPhone. You can disable this feature by navigating to Settings > FaceTime and turning off the "iPhone Cellular Calls" slider.
Also, how can I block calls on my iPad? Launch the FaceTime app from the Home screen of your iPhone, iPad, or iPod touch. Tap on the Info button next the name of the contact you want to block. Tap on Block this Caller at the very bottom. Tap on Block Contact to confirm.
Keeping this in consideration, how do I stop my calls from going to other devices?
Open the Settings app on your iPhone and tap Phone. Tap Calls on Other Devices. Disable your calls from ringing on all your other devices by moving the Allow Calls on Other Devices toggle switch to the Off/white position.
Why can I receive phone calls on my iPad?
Each device is signed in to FaceTime with the same Apple ID. On your iPad or iPod touch, go to Settings > FaceTime, then turn on Calls from iPhone. On your Mac, open the FaceTime app, then choose FaceTime > Preferences. Click Settings, then select Calls From iPhone.
