How to Switch From AT&T to T-Mobile
Everything you need to switch, step by step
T-Mobile Deals Available Now
NEWCapture vivid detail in low light with Nightography on the Galaxy S26 Ultra—save $800 via 24 monthly bill credits when you switch to T-Mobile and add a line on an Experience or Better Value plan.
Enjoy all-day battery life on the iPhone 17e—get it free via 24 monthly bill credits when you switch to T-Mobile and bring your number on most plans.
Get the Pixel 10a for free via 24 monthly bill credits when you switch to T-Mobile and add a line on most plans, plus a free Pixel 2a with purchase.
Get up to $315 off the iPhone 15 via 24 monthly bill credits when you add a line on a qualifying plan and switch to T-Mobile.
NEWSave $730 on the iPhone 17 via 24 monthly bill credits when you trade in 4 eligible phones, add 4 lines on Essentials plan, and switch to T-Mobile.
Promotions change frequently. Verify current offers at your T-Mobile store.
How to Switch, Step by Step
We've listed the current T-Mobile switch promotions above. Pick the deal that works best for you.
Purchase a Verizon port number for $14. It's delivered to your email in minutes with the phone number, account number, and PIN.
Head to your nearest T-Mobile store and tell them you want to port in a number to activate a new line.
Hand the store rep your port number, account number, and PIN. They'll process the port and set up your new line.
The port completes, your new T-Mobile line is live, and the promotional deal is applied to your account.
Which Port Number Do You Need?
Carriers are grouped into families. To qualify for a switch deal, your port number must come from a different carrier family than the one you're switching to.
Since you're switching to T-Mobile, you need a number from the AT&T family or the Verizon family. We recommend a Verizon number — it works for all T-Mobile family deals and is delivered in minutes.
What to Bring to the T-Mobile Store
Common Questions
How long does it take to switch from AT&T to T-Mobile?
The in-store process takes about 30-60 minutes. Your new line activates immediately, and your number transfers within hours.
Will I lose my AT&T number?
No. You're porting a separately purchased number, not your personal one. Your AT&T line stays active until you decide to cancel it.
Can I keep my AT&T phone?
Yes, but it may need to be unlocked. Contact AT&T to request an unlock before you switch. Most modern phones work on T-Mobile once unlocked.
Do I need to cancel my AT&T service first?
No. Don't cancel your AT&T line before switching. The port-in process handles the transfer automatically. Canceling early could void your eligibility for T-Mobile's switch deals.
Ready to Switch?
Get a Verizon port number for $14 and claim T-Mobile's best switch deals.
Learn more about how port numbers work