If you end up having to go through the route of electric trash, I’d recommend buying a phone that is
used
tiny
So that you’re not buying something new, and so that you can use it as a “key fob”.
For example, there was the palm phone in 2018 or so which was a massive flop because it was small and underpowered. Unihertz devices could be another good alternative. Also older, smaller Xperia phones - a 2018 flagship would cost peanuts and be way more powerful than you actually need to run a key fob app.
If you end up having to go through the route of electric trash, I’d recommend buying a phone that is
So that you’re not buying something new, and so that you can use it as a “key fob”.
For example, there was the palm phone in 2018 or so which was a massive flop because it was small and underpowered. Unihertz devices could be another good alternative. Also older, smaller Xperia phones - a 2018 flagship would cost peanuts and be way more powerful than you actually need to run a key fob app.