T-Mobile’s ‘Go5G Next’ Plan Lets Customers Upgrade Smartphones Every Year T-Mobile today announced a new Go5G Next plan that is designed to allow subscribers to upgrade their smartphones on a yearly basis. The plan is available alongside the existing Go5G and Go5G Plus options. Customers who opt for Go5G Next will be able to get a smartphone with a no-interest phone payment plan, and once half the phone has been paid…