I have problems w new mini. No face or button on top work. I ought cellular and may for Att line but can not call out.

Hey there walktobeach,

Thanks for reaching out. We'd like to help!

If you're using an iPad mini, this device would not be capable of using Face ID. You'll need either an iPad Pro 11-inch or an iPad Pro 12.9 inch.

You should have Touch ID capability instead though. Follow along with the steps and link below to get it set up:

Before you can set up Touch ID, you need to create a passcode for your device.* Then follow these steps:

1. Make sure that the Touch ID sensor and your finger are clean and dry.

2. Tap Settings > Touch ID & Passcode, then enter your passcode.

3. Tap Add a Fingerprint and hold your device as you normally would when touching the Touch ID sensor.

4. Touch the Touch ID sensor with your finger—but don't press—so the device can begin recognizing your fingerprint. Hold your finger there until you feel a quick vibration, or until you're asked to lift your finger.

5. Continue to lift and rest your finger slowly, making small adjustments to the position of your finger each time.

6. The next screen asks you to adjust your grip. Hold your device as you normally would when unlocking it, and touch the Touch ID sensor with the outer areas of your fingertip, instead of the center portion that you scanned first.

If you have trouble enrolling one finger, try another. Still need help setting up Touch ID?

Use Touch ID on iPhone and iPad - Apple Support

With regard to the button not working, the top button should power your iPad on and off or wake from sleep. If it's not performing these actions, make sure there are no cases/accessories obstructing the button. If it's clear from any obstructions, use the troubleshooting steps to help with button issues here:

1. Remove any protective films or cases that might block the button or switch.

2. Check for debris or dirt around the button or switch and clean with a soft cloth.

3. If the button or switch still isn't working, is damaged, or works intermittently, you can set up a repair:

Set up an iPad repair

If a button or switch isn't working on your iPhone or iPad - Apple Support

As far as service for your iPad goes, this will only be supplied through the carrier. If it came with a SIM card, that likely means it might have cellular capability, but the carrier would be responsible for activating the SIM with an eligible cellular plan. Learn more about that here: Set up cellular data service on your Wi-Fi + Cellular model iPad - Apple Support

Feel free to reply if you have additional questions.

Take care!