[DrScump]

Unless you got an exceptional price for those GS5s, I'm missing why you prioritized that particular model, which was five generations old by 2018.

I had two. One bought new, one bought off Ebay. Never had trouble with either, but I had abandoned them by 2016ish. I rooted one (to get around mobile hotspot limits), later unrooting it when Tmobile stopped treating tethering/hotspot punitively.

The GS5 was the last of the line with removable battery. The GS6 was the last with an IR port.

One impressive aspect of the Galaxy S has, for me, been reliability. Mine have dropped to hard surfaces many, many times with no damage (aside from cracked glass, with which it still performs fine).