T-Mobile calls it a Temporary Port Out PIN. Only the Primary Account Holder can create it, in the T-Life app or on T-Mobile.com, and your new carrier asks for it with your account number.
Steps checked on October 14, 2026 against T-Mobile's support pages. Sources: T-Mobile support, T-Mobile for Business.
At a glance
Four ways in, depending on your account. The PIN shows on screen: write it down before you close it.
Open T-Life with Wi-Fi off and the phone on the T-Mobile network. Go to Account, tap the gear icon at the top right, then Permission & controls > Transfer PIN. Verify your identity if asked, then tap Create PIN.
From the phone's browser, not a computer, and on the T-Mobile network: your name at the top right > Profile > Permissions & controls > Transfer PIN > Create PIN.
Sign in on T-Mobile.com, open My T-Mobile > My Profile, choose Request Transfer PIN, then Get a Transfer PIN.
In Account Hub, open the Manage Lines tab, tap the three dots next to the line and choose Generate transfer PIN. Validate the one-time code and tap Generate. Stuck? Call 1-800-937-8997.
Have these ready before you start. Each one has to match what T-Mobile has on file.
On your T-Mobile bill, or in your account in T-Life or on T-Mobile.com.
The PIN you generate in the steps above.
T-Mobile also asks for the general account PIN, separate from the transfer PIN.
Exactly as it appears on your bill.
With the ZIP code and state your carrier has on file.
A PDF of the most recent invoice.
We prepare it, you sign it in the app.
The details that save you a rejected request or a line with no service.
Your line has to stay active until the port is done. Cancel early and the number is released, and the port fails.
T-Mobile calls it temporary and doesn't publish how long it lasts. Create it right before you start the port.
In the US, a mobile number usually takes 2 to 4 business days and a landline 7 to 10. We tell you the date as soon as the carrier confirms it.
Creating the PIN is free. T-Mobile may bill what is left on a device plan; Allo charges nothing for the port.
Almost every rejection comes down to one detail that doesn't match what the carrier has on file.
The most common cause. Enter the account holder exactly as it appears on your T-Mobile bill.
Only the Primary Account Holder can create the PIN, and the request also needs the general account PIN. If yours has expired, generate a new one and update the request.
While Port Out Protection is on, T-Mobile blocks the number from leaving. Turn it off before you get the PIN.
An unpaid balance can hold up the port, and a cancelled line can't be ported until it is reactivated.
With the PIN and the account number in hand, the port to Allo starts in the app. We deal with your carrier from there.
01In the app, go to Settings > Numbers > Port a number and add your account number, PIN, account holder and billing address.
02We confirm the number can move within 24 hours and email you at every step. Your current line keeps ringing until the switch.
03The day before, the number shows up in your account so you can set it up. On the day, it moves to Allo with no downtime.
An Allo agent picks up and puts you through to sales or support. It is the fastest demo on this page.
888-298-ALLOT-Mobile's steps checked on October 14, 2026. If anything has changed, T-Mobile's support page wins.
It is the Temporary Port Out PIN: a code you create to authorize your number to leave. Your new carrier asks for it with your account number and your general account PIN.
T-Mobile requires you to ask from the phone with the line on it, on its network, with Wi-Fi off. Turn off any VPN or iCloud Private Relay too. If you aren't the Primary Account Holder, ask them to do it.
On your T-Mobile bill, or in your account in T-Life or on T-Mobile.com.
Yes, for that line. Once the port is done, the number moves to Allo and the T-Mobile service on that line (calls, texts and data) ends. If you'd rather keep your plan, you can forward your calls to Allo instead of porting the number.
Nothing. Porting your number to Allo is free, and the number is part of your plan with no extra monthly fee. Your carrier may still bill what is left on a contract or a device payment plan.
Yes. Your number works as usual right up to the switch. You can also take a temporary Allo number to set everything up while you wait.
Calls move on the day of the switch. Outgoing texts can take up to 48 more hours while carriers update their routing. Allo numbers can't receive one-time passcodes (OTP), so keep another number for two-factor sign-ins.
Yes. You can port your number to another provider at any time, and Allo charges nothing for it. Try everything first with the 7-day free trial.
