How to get old iPhone working?

I jave an old iPhone 1 and I want to get it working again. I do not want it to text or call, just a Wi-Fi enabled device. When I open it it says I need to put in a sim card and I do not have one, nor do I want to buy another one. Is it possible to open it? Any way I can do it is fine, including jailbreaking.

Take it to an Apple store to get assistance.

The only official way is to put in a SIM card to the carrier the iPhone is locked to (most likely AT&T).

However, I believe there's a process called "hacktivating". This allows you to bypass that requirement.
Here's a link to an article that explains it and how to do it

Bring it to a place that fixing them and let them fix it

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