Metro by T-Mobile offers one unlimited line for $15 a month for three months

Metro by T-Mobile is offering new customers one line of unlimited 5G for $15 a month for the first three months. The offer runs through January 1, 2027. It is a prepaid plan, so there is no contract, no activation fee and no credit check. The catch is what happens after the three months end.

What the deal includes

Prepaid means you pay up front for service instead of signing a long agreement. Metro says you can bring your current phone if it meets the company's requirements. That could let you switch carriers without buying a new device.

• One line of unlimited 5G at $15 a month
• Price applies to the first three months only
• No contract, no activation fee, no credit check
• Sign up by January 1, 2027

Who qualifies

The offer is for new customers who bring over an eligible phone number. That means you can keep the number your contacts already know. People who had service with Metro or T-Mobile within the past 180 days are excluded. If you are thinking about returning to either brand, confirm your eligibility first.

What happens after three months

The $15 price is an introductory rate. When the three months end, full-price plan options take over. The material does not list those prices, so check them before you sign up. The ongoing price is what decides whether this is a real saving or just a short break.

Speed and coverage

Metro runs on T-Mobile's network. Its campaign cites Ookla analysis of 1H 2026 data that names T-Mobile as America's best network. Metro does add a warning that it may be slower than T-Mobile when the network is crowded. Using the same network does not guarantee the same experience everywhere.

There is also a data limit to know about. Customers who use more than 35GB a month may notice reduced speeds because of prioritization. Service does not shut off, but it may feel slower depending on network conditions. If you mostly use Wi-Fi at home or work, this may not matter. Heavy video streaming or large downloads away from Wi-Fi could hit the limit.

What to do

Before switching, look up the full-price plan that follows the offer. Check how much mobile data you use in a month, and see how coverage looks in the places you use your phone most. If your current phone still works well, this deal offers a low-cost way to try a different carrier.