If it's time for a smartphone upgrade, this may be your best bet.

T-Mobile is retiring plans from the 3G and 4G eras, it says, which could result in average price hikes of $4 per line.

T-Mobile processes the virtual prepaid Mastercard typically within 15 days, and that covers your eligible phone payoff up to ...

Before you fly this summer, sort five things: pick how you will get data abroad (a travel eSIM is usually cheapest and most predictable), install and set up that eSIM while still on home Wi-Fi, turn ...