Smartphone guru here! Not really lol.
Any smartphone that uses GSM band 12 (700 MHz) should be compatible with T-Mobile (either unlocked or locked to MetroPCS/T-Mobile) and you shouldn't have any issues with band 12. (I use T-Mobile too.)
I would recommend brands like Samsung or LG. Be aware that some older LG phones has boot looping issues if the update is not properly installed (like interrupted updates). I heard LG Stylo would be pretty decent mid end phone. A Google Pixel phone would be a great choice since these phones normally get better support from Google themselves. I wouldn't recommend Galaxy S7 in 2018 since there's a lot of latency the last time I used it back in 2017. S8 is a decent device but the display is fragile, replacing the shattered display may cost a fortune. However the S8 Active is a better alternatives to the S8 and it's more durable.
I had bad experiences with brands like Huawei and ZTE. These phones tend to brick on me quite often. Some of my words are based from my experiences, some people may have different experiences at their end.
Any smartphone that uses GSM band 12 (700 MHz) should be compatible with T-Mobile (either unlocked or locked to MetroPCS/T-Mobile) and you shouldn't have any issues with band 12. (I use T-Mobile too.)
I would recommend brands like Samsung or LG. Be aware that some older LG phones has boot looping issues if the update is not properly installed (like interrupted updates). I heard LG Stylo would be pretty decent mid end phone. A Google Pixel phone would be a great choice since these phones normally get better support from Google themselves. I wouldn't recommend Galaxy S7 in 2018 since there's a lot of latency the last time I used it back in 2017. S8 is a decent device but the display is fragile, replacing the shattered display may cost a fortune. However the S8 Active is a better alternatives to the S8 and it's more durable.
I had bad experiences with brands like Huawei and ZTE. These phones tend to brick on me quite often. Some of my words are based from my experiences, some people may have different experiences at their end.