Is it free to download, install and play The sims 3 from Origin Account?

"bootsguy;d-977694" wrote:
So The Sims 3 is free to download, install and play from your Origin account once you already played The Sims 4 and other The Sims edition and franchise?

I haven't heard that myself. Where did you get that information? Sims 2 was available free for a time but EA is still making money from Sims 3 so I doubt it will be free soon. I expect you would have to subscrible to Origin or Steam Access to get anything like that in future. (Steam Access will be available some time in the Autumn/Fall apparently.

I had registered all my Sims 3 packs when they came out so Origin downloaded them all for me without needing to put in the redeeming codes again. I didn't get anything free.

I would wait for any official announcement. Free downloads may contain viruses and may affect any purchases you want to do later.