You first set up your iPhone, and then set up your iPad.
On your iPhone, go to Settings 
> Cellular.
If your iPhone has Dual SIMs, choose a line (below SIMs).
Do any of the following:
Tap Calls on Other Devices, turn on Allow Calls on Other Devices, then choose your iPad along with any other devices on which you’d like to make and receive calls.
This allows iPad and other devices where you’re signed in with the same AppleID to make and receive calls when they’re near your iPhone and connected to Wi-Fi.
Tap Wi-Fi Calling, turn on Wi-Fi Calling on This iPhone, then turn on Add Wi-Fi Calling For Other Devices.
This allows iPad and other devices where you’re signed in with the same AppleID to make and receive calls even when your iPhone isn’t nearby.
On your iPad, go to Settings> FaceTime, then turn on FaceTime and Calls from iPhone. If you’re asked, turn on Wi-Fi Calling.
Make a call: Tap a phone number in Contacts, Calendar, FaceTime, Messages, Search, or Safari. Or open FaceTime, enter a contact or phone number, then tap .
Receive a call: Swipe or tap the notification to answer or ignore the call.
Note: If you enable Wi-Fi Calling, emergency calls may be made over Wi-Fi, and your device’s location information may be used for emergency calls to aid response efforts, regardless of whether you enable Location Services. Some carriers may use the address you registered with the carrier when signing up for Wi-Fi Calling as your location.
FAQs
You can make and receive calls on your iPad by using Wi-Fi Calling to relay phone calls through your iPhone (iOS 9 or later required). Cellular charges might apply.
Does my iPad have its own phone number? ›
You can find your phone number on your iPad in two different ways. If you have an iPad that has Wi-Fi + Cellular, it has a phone number associated with the SIM card – you cannot place a voice call to this number, since it is a data-only plan, but you can find it in the Settings app's About section.
How do you connect your phone to your iPad? ›
Enable Bluetooth on the phone. In the Bluetooth menu, make the phone discoverable by tapping the top message. On the iPad, turn the Bluetooth on in Settings. When the phone appears on the list of devices, Tap to connect.
Can I use my tablet as a phone? ›
Tablet calling is easy
Once you've established an internet connection, you really need only two things to make your tablet function as a smartphone: an app that makes use of VoIP (Voice over Internet Protocol) or VoLTE (Voice over LTE) wireless calling technology, and a pair of headphones.
Can you FaceTime on an iPad? ›
You can use FaceTime on any of these devices on Wi-Fi: iPhone 4 or later, iPad Pro (all models), iPad 2 or later, iPad mini (all models), and iPod touch 4th generation or later (only iPod touch 5th generation or later support FaceTime audio calling).
Can I use my iPad to make phone calls without an iPhone? ›
Tap Wi-Fi Calling, turn on Wi-Fi Calling on This iPhone, then turn on Add Wi-Fi Calling For Other Devices. This allows other devices where you're signed in with the same Apple ID to make and receive calls over Wi-Fi even when your iPhone isn't nearby.
Do you need a separate phone line for an iPad? ›
All things considered, an iPad does not need a line. You can't make phone calls from it. You can't register the My Verizon app with it to check your account because the authentication code comes via SMS to the iPad number, which the iPad cannot receive.
Can my iPhone and iPad use the same phone number? ›
You can use the phone number of your iPhone with Messages and FaceTime on your Mac, iPad, or iPod touch.
How do I put a phone number on an iPad? ›
Add or edit your contact info and photo on iPad
- Open the Contacts app on your iPad.
- Tap My Card at the top, then tap Edit. If you don't see My Card, tap. ...
- Enter your contact information. Contacts suggests addresses and phone numbers to help you.
After you set up iCloud on both devices, they'll remain synced. This approach keeps the majority of your information identical across both devices. The iCloud is accessible on iOS, macOS, and Windows devices, and it keeps your data secure when it is in storage and when it is in transit.
You can send a text message to one or more people to start a new conversation. Open the Messages app on your iPad. at the top of the screen. Enter the phone number, contact name, or Apple ID of each recipient.
How can I make a mobile call from my iPad? ›
On your iPad, go to Settings > FaceTime, then turn on FaceTime and Calls from iPhone. If you're asked, turn on Wi-Fi Calling.
Why does an iPad have a phone number? ›
When you purchase an iPad with cellular service, the phone numbers for billing purposes and it allows you to use the iPad when you do not have a Wi-Fi connection.
Can you text on an iPad? ›
In the Messages app , you can send text messages in two different ways: Using iMessage with others who also use iMessage on an iPhone, iPad, or Mac. Your iMessage texts appear in blue bubbles. With SMS/MMS messages forwarded from your iPhone.
Can you FaceTime on an iPad without cellular? ›
With an internet connection and an Apple ID, you can make and receive calls in the FaceTime app . Note: You must set up FaceTime before you can make and receive calls. On iPad Wi-Fi + Cellular models, you can also make FaceTime calls over a cellular data connection, which may incur additional charges.
> Cellular.
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