iOS update

The first generation iPad Air is too old to receive recent version of iPadOS. Here is a list of iPad devices that can receive the latest version: iPad models compatible with iPadOS 15.2 - Apple Support

If you're referring to an iPad 2, iPad 3, or first generation iPad mini, no; some of these can be updated to 9.3.6, but this will only fix an issue with the GPS. Otherwise, use a computer or the Software Update function in Settings.

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Only if a newer version is compatible with that model. See the first sentence above.

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Neil

i have an iPad Air. I cannot update past 12.5 iOS. Is it too old?

If you're trying to update it to 13 or above, yes.

If you're trying to update it to 12.5.5, describe what happens.

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Thanks all