Ask HN: Is there something like Infinite Mac for any '00s-era cellphones?

I'm helping with sound for a production taking place in the aughts, and I'd love to use an actual mobile phone OS to capture the sound from the interface for what the characters are doing. Not any one specific phone (though the original Razr wouldn't be inappropriate) but standard feature phone would be great.

I'm failing to find anything searching online, but I figure there's at least one instance of this out there – if an entire desktop operating system from the end of the '90s works in the browser, something that fit on a phone must too.