T-Mobile Promo Codes in September 2026

You can earn a $300 cashback T-Mobile promo code when you sign up for a qualifying T-Mobile 5G Home Internet plan. This offer is only valid when activating a new qualifying Home Internet line, putting money back in your pocket while upgrading your home connectivity.

Yes. T-Mobile plans come with Price Lock, meaning your 5G Home Internet rate won’t increase as long as you stay on your qualifying plan. This helps you budget confidently with no surprise hikes or hidden fees.

Yes! K-12 students are eligible for free internet and up to 500GB of data for five years. This offer comes with no extra fees, costs, or annual recertifications. For full details and to see all student benefits, visit the “Free Internet for Students” page.

T-Mobile has three 5G Home Internet plans to suit different needs and budgets. Here’s a quick breakdown:

• Rely Plan at $50 per month: Basic connectivity with essential features.

• Essentials Plan at $60 per month: Faster speeds and extra perks.

• All-in Plan at $70 per month: Premium features including cyber security, expanded streaming perks, and Wi-Fi mesh access points for full-home coverage.

All plans include:

• Price Lock guarantee means your rate will not increase unexpectedly.

• No annual contracts or commitments.

• Unlimited data with no caps or throttling.

To save even more, apply a T-Mobile coupon code at checkout to reduce your starting costs. Keep in mind that taxes and fees still apply.

T-Mobile’s Refer-a-Friend program lets you and your friends earn rewards when you refer someone to T-Mobile. Here's how it works: For Referrers:

• Reward: Earn a $100 Virtual Prepaid Mastercard for each successful referral.

• Limit: You can earn up to $500 in referral rewards per calendar year.

• Eligibility: Available to postpaid customers and T-Mobile for Business customers with 12 voice lines or fewer.

For Referees:

• Reward: Receive a $100 Virtual Prepaid Mastercard when you accept a referral, activate a new postpaid account, and port in a number from an eligible wireless carrier.

• Requirements: Must activate within 14 days of accepting the referral and maintain service for at least 30 days.

Both parties must remain in good standing for the referral to be valid. To get started, visit their referral page. and log in with your T-Mobile ID. From there, you can share your unique referral link with friends and track the status of your referrals.