I have a Xiaomi Redmi 4G (codename: Dior) that is 3+ years old. It works on T-Mobile. That chart is helpful. I would also read the reviews of the phone and che

I have a Xiaomi Redmi 4G (codename: Dior) that is 3+ years old. It works on T-Mobile. That chart is helpful. I would also read the reviews of the phone and check if the phone says "Global Edition" or "Global Version" to also check compatibility. I use the Mokee ROM. It gets regular updates. But, the Huawei Ascend XT2 feels much faster with a longer-lasting battery.