I’m using old Samsung S3 and S4 phones with Android7 Lineage on them. I would go any older than that, and the Bluetooth works more reliably if you can get Andro

I’m using old Samsung S3 and S4 phones with Android7 Lineage on them. I would go any older than that, and the Bluetooth works more reliably if you can get Android 8 or newer (none of the Lineage images of 8 will boot on my S3s.) You don’t need anything that you probably couldn’t find in the back of your or a family members junk drawer...