The wireless carrier adds that Mint and Ultra will be "complementary" to the carrier's other prepaid options, which include Metro by T-Mobile, T-Mobile's own branded prepaid service, and its Connect by T-Mobile brand.

Source: https://www.cnet.com/tech/mobile/t-mobile-is-buying-mint-mobile-in-potential-1-35-billion-deal/

To get a prepaid cell phone plan, you can visit the carrier's website or a retail store that sells prepaid phones.

Source: https://www.devicemag.com/free-cell-phone-no-deposit-no-activation-fee/