Cellular data isn't working on my iPhone XR

First thing that I would suggest that you do is contact your carrier and ensure that the cellular service is active on your SIM card.

Also, review the instructions in this guide published by Apple 👉 If you can't make or receive calls on your iPhone

Axel F.

David ~ As it's an older model iPhone, it can be worth checking for a weak battery...

Does your iPhone XR still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health & Charging

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