In the United States, number portability lets you keep an eligible telephone number when changing service providers. Start by asking the receiving provider to check your exact number, service type, and intended location. That check is separate from choosing a plan or confirming that your phone will work on the new network.
Check the number, the destination, and the device
The FCC's consumer center explains that porting can take place between wireline, IP, and wireless providers when changing providers within the same geographic area. Eligibility for a particular destination still needs confirmation. A number accepted by one provider may require a different service arrangement at another.
Use the receiving provider's official number checker or support team. For example, AT&T's number-transfer page checks the actual number. Give personal account information only through the provider's authenticated process. A sales discussion about coverage alone does not establish that the number has passed this check.
Scroll sideways to read all columns.
| Check | Question to ask | Useful confirmation |
|---|---|---|
| Number eligibility | Can you accept this number from this provider into the service I want? | The checked number, proposed service, result, and any location restriction. |
| Account authority | Who can authorize the transfer, and what account details are required? | An authorized account holder and the old provider's correct transfer process. |
| Device readiness | Can this exact handset use your network, voice features, and SIM or eSIM? | A device compatibility result and any required carrier unlock. |
Moving house raises an additional question. Tell the receiving provider both the number's present service location and the place where you intend to use it. A provider switch and a relocation can involve different geographic constraints. Have the provider resolve those constraints before disconnecting a home line or ordering replacement equipment.
For an iPhone, Apple explains how to check Carrier Lock and request an unlock through the carrier. An unlocked handset still needs the new provider's compatibility check. If you are buying another phone, ask separately which number will be assigned to that device.
Keep porting rights separate from money owed
A valid number transfer and the settlement of an old account are separate matters. In its number-portability order (PDF), the FCC established that a carrier may not hold up a port merely to collect fees or settle an account. Existing payment obligations remain. Ask support to distinguish a billing dispute from an invalid authorization, incorrect account field, or disconnected number.
For interconnected VoIP, 47 CFR 52.34 requires providers to facilitate valid ports without unreasonable delay or procedures. This does not make every proposed service or location eligible. Obtain a concrete explanation if a receiving provider says it cannot support your number.
Before committing, request a written breakdown of any transfer charge, activation fee, remaining installment balance, contract charge, and recurring service cost. Those are different line items. A waived transfer fee says little about the total cost of changing providers. Use the switching-cost guide to compare staying and leaving over the same period.
Ask what the quoted transfer time covers
The porting-interval rule in 47 CFR 52.35 distinguishes simple wireline and intermodal ports from non-simple ports. Its one-business-day interval for simple ports allows a longer period requested by the customer or new provider and has specified exceptions. It is a provider processing rule; it should not be read as a promise that ordering equipment, correcting rejected information, and setting up every service will finish within a day.
Ask the receiving provider when it considers your request complete and valid, whether it has been accepted, what transfer date is planned, and what could change that estimate. A multi-line business migration or a home-phone service change may require additional coordination. Keep another way to communicate during the transition and avoid scheduling the transfer immediately before a critical call or trip.
Turn the answers into a clear go-ahead
- Confirm acceptance. Record which number and destination service were checked, when, and by whom.
- Resolve dependencies. For a home or business line, list bundled internet, fax, alarms, or other equipment and ask the relevant supplier how a service change affects each one.
- Prepare authorization. Follow the account-details and transfer-PIN guide; retain the old account access.
- Agree on the next step. Have the receiving provider identify the request reference, intended timing, and contact route for problems.
Escalate a specific unresolved issue
If the receiving provider rejects the number, ask whether the cause is geographic eligibility, account information, authorization, protection settings, or a service limitation. If a request is already underway, use the porting troubleshooting guide to record the status and correction required.
The FCC phone-complaint guide includes number portability. Retain provider names, dates, case references, and the stated reason for refusal or delay. A clear record helps describe the dispute; filing a complaint does not itself guarantee immediate restoration.
Return to Number Portability guides and the transfer checklist.