I did search unlocked phones before commenting; couldn't find a comparable phone. The link you posted comes with a 60-day lock period.
The cheapest phone in India with an HD display comes in at around 25% higher than what Jio phone will sell for (if the $50 turns out to be true).
Disclosure: I did work with Jio (as a consultant) on software for their older JioPhone, running a version of Firefox OS. It sold about 70 million units.
Add: Perhaps my Google fu is lacking, but I am not able to validate "decent sub $50 phones have been around for years". With these specs, that is. I can't find anything on Amazon, Walmart and TMobile under 50.
I find your lack of effort "a little disheartening" as you say. It's like you don't want to believe it's cheap and easy to get a decent new phone for very little.
I went to the trouble of doing what you were too lazy to do. I don't have time to do more pointless googling but Verizon prepaid sells a no contract $55 smartphone today. You can likely get better deals if you shop around at all, or are in a cheaper market than the USA. I'm not going to engage with you further, do your own work. https://www.verizon.com/smartphones/orbic-maui-prepaid/?cmp=...