Text messages

You must explicitly enable Text Message Forwarding for your [new] iPad on your iPhone.

On your iPhone:

Settings > Messages > Text Message Forwarding - set to ON - and explicitly enable your iPad from the list of devices.

Also ensure that Messages in iCloud is enabled on both your iPhone and iPad:

Settings > [Your Name / AppleID] > Messages - set to ON

More information:

How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support

Fault finding if needed:

If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support

As the iPhone acts as a relay for your iPad to send/receive SMS messages, it follows that while “travelling” outside the area for which your iPhone has an active cellular contract and coverage, the iPhone must be able to “roam” to other cellular networks.

I hope you find this information to be helpful in resolving the issue.

Hi,

can you specify the problem a little bit more?

Is iMessage not working, text messages or both?

What iPad Air do you use exactly?

What iOS version is running?

Kind regards