T-Mobile is offering a limited-time promotion that includes a free month of 5G Home Internet service plus up to $300 back when customers use the code MONTHONUS at checkout. The deal applies to all three of T-Mobile's 5G Home Internet plans, with the prepaid Mastercard value varying by subscription tier. This promotion also includes a five-year price guarantee and potential savings when bundling with a phone plan.

The prepaid Mastercard arrives within 14 weeks of activation, with amounts ranging from $100 for the Rely plan to $300 for the All-In plan. Starting at $70 per month, the All-In plan offers average download speeds of 170–498 Mbps, a free mesh Wi-Fi extender, 24/7 customer support, and free subscriptions to Hulu and Paramount Plus. T-Mobile also offers additional discounts when pairing home internet with its unlimited phone plans, potentially dropping the monthly cost to as little as $30 for customers over 55.

This promotion represents one of the most aggressive attempts by a major carrier to attract broadband customers away from traditional cable and fiber providers. With a 15-day free trial and free gateway device shipping, T-Mobile is removing nearly all barriers to entry for potential customers. The deal is particularly attractive for those in areas with strong T-Mobile coverage who are dissatisfied with their current internet service provider's pricing or performance.