A:Answer It's very important which standard does support cell phone.
Verizon and Sprint work only with cell phones which support CDMA.
Metro PSC it's a sub-network of T-Mobile. T-Mobile, AT&T, and some others use GSM.
This device (Samsung Galaxy S8/S8+) support both standards as GSM as CDMA. It means that it will work with any carrier.
On the product page, find Carrier Compatibility and you will see T-Mobile on the list. Metro PCS use network of T-Moble.
Carrier Compatibility: AT&T, Consumer Cellular, Cricket, H2O Wireless, Net10, Republic Wireless, Simple Mobile, Sprint, T-Mobile, TRACFONE, US Cellular, Verizon.