Yes, you can keep your phone number when switching carriers. Federal law protects this right. The process is called number porting, and it usually takes minutes to a few hours for wireless numbers.
But one wrong move can cost you the number forever. The most common mistake is canceling your old service before the transfer finishes. If you cancel first, your number can be released and lost for good.
This guide gives you the exact order of steps. You will learn what information to gather, which security locks to turn off, and how to avoid surprise fees. Follow it carefully, and your number moves with you safely.
Your Legal Right to Keep Your Number
The Federal Communications Commission (FCC) requires carriers to let you take your number with you. This rule is called Local Number Portability (LNP). It covers wireless, landline, and VoIP numbers, as long as you stay in the same geographic area.
Here is the part most people do not know. Your old carrier cannot refuse to release your number, even if you owe money. An unpaid balance or an early termination fee does not block a port. You still owe the money, but the carrier must let the number go.
One limit applies. If you move to a completely different region, the number may not be eligible. Some small rural carriers also hold waivers. Your new carrier can check eligibility in seconds, so ask them first.
Never Cancel Your Old Service First
Keep your old line active until the transfer completes. This is the single most important rule in the entire process.
Your new carrier pulls the number from your old carrier. That handoff only works if the number is still live. If you cancel early, the number detaches from your account. It can then return to the carrier’s general pool. Getting it back is difficult and sometimes impossible.
Your old account closes automatically once the port finishes. You never need to call your old carrier to cancel. In fact, calling them first usually triggers a retention script designed to keep you.
What You Need Before You Switch: The Porting Checklist
Gather four pieces of information before you contact your new carrier. Ports fail most often because one of these details is wrong or missing.
- Your 10-digit phone number. The number you want to keep.
- Your account number. This is on your bill or inside your carrier app. It is not your phone number.
- Your Number Transfer PIN. A special temporary code explained below.
- Your billing name and address. These must match your old carrier’s records exactly.
That last item trips up more people than you would expect. Automated porting systems compare your details letter by letter. A maiden name, an old apartment number, or a wrong ZIP code can reject the whole request. Pull up a recent bill and copy the details exactly as printed.
Also download copies of your recent bills now. Many carriers cut off your online account access the moment your number leaves. Saving your billing history first protects you if a dispute comes up later.
What Is a Number Transfer PIN?
A Number Transfer PIN is a temporary security code that authorizes your port. It is not your account password. It is not your 4-digit billing PIN. It is not your lock screen code.
Carriers created this system to fight port-out fraud. The PIN proves that the real account holder approved the move. Most transfer PINs are six digits and expire within about four to seven days. Generate yours only when you are ready to switch, then give it to your new carrier promptly.
I have seen switchers spend an hour on the phone because they handed over their regular account PIN. The new carrier’s system rejects it every time. Make sure the code you provide was generated specifically for a number transfer.
How to Get Your Transfer PIN From Each Major Carrier
Each carrier hides this code in a slightly different place. Here is where to find it.
| Carrier | How to Get Your Number Transfer PIN |
| Verizon | Dial #PORT from your phone, or go to the My Verizon app or website. Look for “Number Transfer PIN” in your profile settings. Valid for 7 days. |
| AT&T | Dial *PORT from your AT&T phone, or open the myAT&T app. Go to People & Permissions, then Transfer Phone Number. |
| T-Mobile | Use the T-Life app or T-Mobile.com to generate a Temporary Port Out PIN. Only the primary account holder can create it. |
| Tracfone brands | Text NTP to 611611 to receive your transfer PIN. |
One T-Mobile quirk deserves a warning. You must be connected to the T-Mobile cellular network when you request the PIN. Turn off Wi-Fi and disable any VPN, including Apple’s iCloud Private Relay. Otherwise the system shows an error.
If your old phone screen is broken and cannot receive texts, do not panic. You can generate the PIN from the carrier’s website on a computer. You can also call customer service or visit a store with photo ID. The number can still port even if the old handset never turns on again.
Turn Off Port Protection Locks First
Your transfer PIN will not work if a port freeze is still active on your account. Carriers added these locks to stop SIM-swap criminals. They are great for security, but they will block your own legitimate transfer too.
- Verizon calls it Number Lock, and it is often on by default. Turn it off in My Verizon before generating your PIN.
- AT&T calls it Wireless Account Lock. Disable it in the myAT&T app under your profile.
- T-Mobile calls it Port Out Protection. Only the primary account holder can remove it.
Turn the lock off, complete your port, and know that your new carrier offers similar protection. Turn the new lock on once your number lands safely.
Step-by-Step: How to Port Your Number the Right Way
Follow this exact sequence. The order matters more than the speed.
- Confirm your phone is unlocked. A carrier-locked phone cannot read a new provider’s SIM, even after the number transfers. Contact your current carrier and request an unlock, or check the setting in your account app. Most carriers unlock paid-off phones automatically after 60 days of service, but always verify.
- Check network compatibility. Give your new carrier your phone’s IMEI number. Dial *#06# to see it. Their website tells you instantly if the device works on their network.
- Note your device payment balance. Any remaining Equipment Installment Plan balance becomes due after you leave. More on this below.
- Turn off the port protection lock on your old account.
- Generate your Number Transfer PIN.
- Sign up with your new carrier and choose “transfer my number.” Provide your phone number, old account number, transfer PIN, and exact billing details. Do this during their sign-up flow, not after.
- Keep your old phone on and active. Watch for a confirmation text from your old carrier. This message verifies the port is legitimate. If you did not request it, call the number in the text immediately.
- Activate your new SIM or eSIM when prompted. Your new carrier tells you when the transfer completes.
- Test everything. Make a call, send a text to a friend on a different network, and ask them to reply. Check mobile data too.
How Long Does Number Porting Take?
Most wireless-to-wireless transfers finish within a few minutes to a few hours. FCC rules require simple ports to complete within one business day.
Landline and VoIP transfers move slower. Porting a landline number to a cell carrier can take several business days. These transfers follow a different technical path than mobile ports. Plan for up to a week and keep both services running until it finishes.
Three things slow ports down:
- Typing errors. A mismatched name or address sends the request into manual review.
- Weekends and holidays. Some carrier porting departments run limited hours. A Friday evening request may not finish until Monday.
- Security blocks. An active Number Lock stalls everything until you remove it.
During the transfer, you may experience a short “dual service” window. Your old phone might receive calls while your new phone handles texts, or the reverse. T-Mobile notes this mixed period can last up to 24 hours. It resolves on its own. One safety note: if you call 911 during a port, stay on the line. The operator may not be able to call you back if you get disconnected.
Physical SIM vs. eSIM: How Your Choice Changes the Timing
An eSIM lets you start your port today. A physical SIM makes you wait for the mail.
An eSIM is a digital SIM profile that downloads over the air. Most iPhones since the iPhone XS and most recent Android flagships support it. When you sign up with an eSIM, your new carrier sends an activation code or push notification. The number port and activation can finish the same day, often within the hour.
A physical SIM card must ship to your house or be picked up in a store. The port itself does not start until you pop the card in and activate. If you order online, expect two to five days of shipping before anything happens.
A helpful trick for eSIM users: keep your old physical SIM in the phone during the switch. Your old line keeps working right up until the moment the new eSIM takes over. Downtime often drops to just a few minutes.
What Switching Really Costs: Fees and the Final Bill
Porting your number is free at all major carriers. The FCC does not allow carriers to punish you with a specific port-out penalty. But leaving can still cost money in three ways.
Your remaining phone payments come due. Switching carriers does not erase your Equipment Installment Plan. If you owe $400 on your phone, your old carrier bills the full $400 on your final statement. Any promotional monthly credits on that device also stop, so the “free” phone can suddenly carry a real balance. Check your device payoff amount in your account app before you commit.
Early termination fees may apply. These are rare now, since most plans dropped contracts. But some older plans and business agreements still carry them.
Your final bill arrives after you leave. Most carriers do not prorate the last month. Watch your email and mailbox for that final statement, because your auto-pay and paperless settings may shut off when your account closes. A missed final bill can hurt your credit. This is another reason to download your billing records before you port.
Timing tip: switch a few days after your billing cycle starts. You already paid for the month, so you lose the least amount of prepaid service.
Special Situations That Need Extra Care
Porting Out of a Family Plan
You can port one line out of a family plan without canceling the others. The remaining lines stay active. But two things change.
First, pricing tiers often shift. A four-line discount plan may cost more per line when only three lines remain. Warn the people staying behind so the new bill does not surprise them.
Second, porting the primary account holder’s number gets tricky. Billing roles, auto-pay, and account ownership are tied to that line. Call your old carrier and transfer account ownership to another family member before you port the primary number. This keeps the remaining lines stable.
Splitting a Number Off a Joint or Ex-Partner’s Account
Only the account owner or an account manager can generate a transfer PIN. If your number sits on someone else’s account, you need their cooperation, or you need the carrier to split the line to your own account first. Carriers have processes for separations and domestic violence situations. Verizon, for example, offers dedicated support for moving lines safely in abuse situations. Call customer service and ask about a “transfer of service” or line separation.
Porting a Suspended Number
A number suspended for non-payment can often still port, since carriers cannot refuse a port over unpaid balances. In practice, a suspension can complicate the automated handoff. The cleanest path is to restore the line, start the port, and settle the balance on your final bill.
Porting a Google Voice or VoIP Number to a Cell Carrier
VoIP numbers can move to wireless carriers, but the steps differ. For Google Voice, you must unlock the number first inside Google Voice settings. The unlock costs $3, or nothing if you originally ported the number into Google Voice. Your “account number” is your 10-digit Google Voice number, and your PIN is your voicemail PIN. Expect the transfer to take longer than a normal wireless port, sometimes several business days.
Porting a Landline to a Cell Phone
Landline-to-wireless ports are allowed and work well for retiring a home phone. They take longer, usually a few business days. You may briefly have two working phones with the same number. Keep paying the landline bill until the port confirms.
Troubleshooting: When Your Port Gets Stuck
The port was rejected. Mismatched account details cause most rejections. Call your old carrier and read back the exact name, address, and account number they have on file. Then resubmit the request with your new carrier using those exact details.
Calls work but texts do not. This mixed state is common in the first 24 hours. Restart your phone first. If texts still fail after a day, ask your new carrier to refresh your messaging registration.
You switched from iPhone to Android and texts from iPhone friends vanish. This is an iMessage problem, not a porting problem. Apple’s servers still think your number uses iMessage. Before you retire your iPhone, go to Settings, then Messages, and turn iMessage off. Already gave up the iPhone? Visit Apple’s Deregister iMessage page and remove your number there. Messages usually flow normally within a few hours.
Your transfer PIN keeps failing. Check three things. The PIN may have expired, since most last only a few days. A port protection lock may still be active. Or you may be reading an account PIN instead of a transfer PIN. Generate a fresh one and try again. One caution: do not generate multiple new PINs after you already gave one to your new carrier. That can invalidate the pending request.
The port has been pending for days. Ask your new carrier for the port status and rejection reason. They can see the exact error code. If both carriers point fingers and nothing moves, file a free complaint at consumercomplaints.fcc.gov. Carriers respond quickly to FCC complaints.
Protect Yourself From Port-Out Scams
Criminals steal phone numbers to break into bank accounts. They trick a carrier into porting your number to their SIM, then intercept your two-factor codes. You can block this.
- Turn on your carrier’s port freeze the moment your switch finishes. Verizon Number Lock, AT&T Wireless Account Lock, and T-Mobile Port Out Protection are all free.
- Never share a transfer PIN with anyone except the new carrier during your own sign-up. No legitimate company will call you and ask for it.
- Treat unexpected “port requested” texts as a fire alarm. Contact your carrier immediately using the number on their official site.
- Move your most sensitive two-factor codes to an authenticator app instead of text messages.
Frequently Asked Questions
Do I lose my voicemails when I switch?
Usually yes. Saved voicemails live on your old carrier’s servers and do not transfer. Record or export any messages you want to keep before you port.
Can my old carrier charge me a fee just for leaving?
No specific port-out penalty is allowed. You only owe what you already agreed to, such as device balances or an old contract’s termination fee.
What happens to my contacts, photos, and apps?
Nothing. That data lives on your phone and in your cloud accounts, not with your carrier. Only the service changes.
Can I port a prepaid number?
Yes. Prepaid numbers port the same way. Tracfone, Metro, Cricket, and similar brands all provide account numbers and transfer PINs. Keep the prepaid line topped up and active until the port completes.
Will my number work with Mint Mobile, Visible, or other budget carriers?
Yes. MVNOs like Mint Mobile (on T-Mobile’s network) and Visible (on Verizon’s network) follow the same FCC porting rules. One note: porting between brands that share a network, such as Verizon to Visible, still counts as a full port and needs the same PIN and account details.
The Bottom Line
Keeping your phone number when switching carriers is a protected right, and the process rewards preparation. Gather your account number, generate a real Number Transfer PIN, match your billing details exactly, and never cancel the old line first. Do those four things and your number follows you in hours, not days.
Your phone number carries your banking security, your logins, and your relationships. Treat the switch like the important move it is. With this checklist in hand, you can chase a cheaper plan or better coverage with total confidence.
Sources
- Federal Communications Commission: Porting – Keeping Your Phone Number When You Change Providers (fcc.gov/consumers/guides/porting-keeping-your-phone-number-when-you-change-providers)
- Verizon Support: Move Your Mobile Number to Another Carrier FAQs (verizon.com/support/port-out-faqs)
- Verizon Support: Bring Your Number to Verizon FAQs (verizon.com/support/local-number-portability-faqs)
- AT&T Support: Get a PIN to Transfer Your Wireless Number (att.com/support/article/wireless/KM1447526)
- T-Mobile Support: Transfer Your Phone Number (t-mobile.com/support/account/transfer-your-phone-number)
- Google Voice Help: Port Your Google Voice Number (support.google.com/voice/answer/1065667)
- FCC Consumer Complaint Center (consumercomplaints.fcc.gov)