Privacy with iPad Pro cellular

Perfectly safe - and private - having a Cellular model does not present any privacy issues. You do not need to utilise the Cellular features or activate a Cellular Service plan with any provider. It’s sometimes useful to have access should it ever be necessary; remember, you cannot “upgrade” the internal hardware.

Consider also that the Cellular model may in fact be a better choice - whether you intend to use the Cellular features or not. If you ever need to use GPS positioning to automatically determine your location, then be aware that only Cellular models of iPad include GPS capabilities.

Many purchasers of WiFi Only iPad discover this fundamental difference when its too late - and subsequently regret the assumed frugality of choosing the WiFi Only in preference to the Cellular model. Personally, if the small cost differential is not an issue, I would always recommend the Cellular model over WiFi Only.

I hope this is helpful in informing your eventual decision.

As long as you are using your AppleID and other proper security on the iPad, and not using any additional data storage services or email via the provider, the only thing should would have access to is the amount of data you use.