I purchased a Samsung Galaxy A01 at Best Buy for $59.99 + tax. It seems to work really well. If you order on line you can only order one (1) at a time. I wanted more than one (1) so I place two (2) orders, one right after the other. I placed the online order about midnight and was able to pick it up, at the store, at 10am. I plan on using these phone exclusivity for my train layout, so I did not activate the carrier.
Also, I just found a reconditioned Samsung Galaxy A01 for $29.99 on Straight Talk web site. https://www.straighttalk.com/all-phones/reconditioned-samsung-galaxy-A01.black
Latest deal (2/27/24) at <$40: https://www.amazon.com/Total-Verizon-TCL-32GB-Black/dp/B0CHHL5R3H
It's an Android 12 with 3GB of RAM and 32GB of memory. After you receive it, simply throw the SIM card out and you will have a dedicated train controller!