How do I switch carriers without losing my current promotional pricing in 2027?

A concrete scenario: the $1,080 promo that almost vanished

Picture a two-line household on a mid-tier unlimited plan. Eight months ago they signed up during a carrier's spring promotion: $35 per line per month for 24 months, a $25 monthly credit stacked on top of a $60 base rate, plus a waived $35 activation fee per line. Total promotional value over the term is roughly $1,200, and $1,080 of it is still unclaimed. The household's contract term is up in March 2027, and a rival carrier is advertising a similar plan at a lower headline rate.

The instinct is to walk into the new carrier's store, hand over the phone numbers, and let the port happen. That instinct is what costs people money. In most carrier structures, the moment the port completes, the old account closes, and every account-level credit tied to that account terminates on the spot. The remaining $1,080 does not follow the phone number to the new carrier. It simply evaporates, and the final bill often shows a prorated charge plus a clawback of any credit already applied that cycle.

Now picture the same household doing three things differently. First, they read the promotional terms on the original account and identify whether the credit is attached to the line, the device installment, or the account itself. Second, they schedule the port for day 27 or 28 of a 30-day cycle so the final bill is nearly complete and no credit is reversed. Third, they ask the new carrier's retention or sales team to issue a written offer that explicitly covers the remaining promotional value, either as a bill credit, a waived activation fee, or a device credit. That written offer is the thing that makes the switch financially neutral instead of a loss.

The difference between those two scenarios is not luck. It is sequencing, documentation, and knowing which bucket the promotional pricing lives in. The rest of this page is about how to do that reliably, including the exact mechanics, the numbers you should expect to see, and the traps that quietly void credits.

How the mechanism actually works

Carrier promotional pricing is not one thing. It is at least four different instruments that behave differently when you port a number, and the single biggest cause of lost promotions is treating them as interchangeable.

Account-level credits. These are monthly recurring credits applied to the billing account, not to a specific line. Examples include "loyalty credits," "autopay and paperless discounts," and multi-line promotional discounts. These are the most fragile. When the last line ports out, the account closes, and the credit stream stops immediately. Any remaining months of value are forfeited. If you have 10 months left on a $25 monthly account credit across two lines, that is $500 gone the moment the port completes.

Line-level credits. These attach to a specific phone number and sometimes survive a port if the receiving carrier accepts them, but in practice most carriers do not transfer credits between billing systems. What matters is whether the credit is tied to the line or to the account. A line-level credit on a line you keep active on the old account (for example, a third line you are not moving) can continue. A line-level credit on a line you port out generally ends.

Device installment credits. This is the most common and the most misunderstood. When you buy a phone on a 24- or 36-month installment plan with a promotional credit, the carrier typically applies the credit monthly against the installment. If you leave before the term ends, the remaining installment balance usually becomes due in full on the final bill, and the remaining credits stop. A $999 phone with $600 in promotional credits over 24 months, cancelled at month 8, can leave roughly $666 of device balance owed and $400 of unclaimed credits forfeited. That is the single largest loss category.

Contract termination and early-exit fees. Some plans still carry a fixed early termination fee, often $0 to $350 per line depending on the plan and whether the device is financed. These are separate from device balances and are usually charged per line.

The practical rule: before you port anything, get a written statement from the current carrier listing every active credit, its monthly amount, its remaining months, and whether it is account-level, line-level, or device-attached. Most carriers will provide this on request through chat or in the account's promotional terms page. If they will not put it in writing, treat the credit as account-level and assume it dies on port.

The sequencing matters as much as the classification. Port on the last two days of your billing cycle, not the first. If you port on day 2 of a 30-day cycle, you have already consumed two days of service, the carrier will bill a full or prorated month, and any credit applied at cycle start may be reversed. Porting on day 27 or 28 means the cycle is nearly finished, the credit has already been earned for that period, and the final bill is small and predictable.

Also: never cancel the old service before the port completes. Cancelling first releases the number, and a released number can be recycled or held, which can delay or block the port entirely. The port itself is what closes the account. Let it do that job.

Real numbers, ranges, and benchmarks

Concrete ranges make this decision tractable. The following are typical U.S. carrier structures as of the mid-2020s and should be verified against your own account documents, since terms vary by plan, region, and promotion.

Promotional credit values. Monthly recurring credits commonly run $10 to $30 per line. Device promotional credits commonly run $200 to $1,000 total per device, spread over 24 or 36 months, which works out to roughly $8 to $42 per month. A household with two lines and two financed devices can easily be carrying $1,500 to $2,500 in unclaimed promotional value at any given time.

Remaining-months math. If you are 8 months into a 24-month credit worth $25 per month, you have $400 left. If you are 18 months into a 36-month device credit worth $600 total, you have roughly $300 left. Write these numbers down before you talk to anyone. The number you are protecting is the number you negotiate against.

Early termination and device payoff. Early termination fees on current unlimited plans are frequently $0, but device payoff balances are not. A phone with a $999 retail price financed over 36 months at 0% has a payoff of roughly $999 minus payments made. At month 12, that is about $666. At month 24, about $333. This is the figure that most often makes switching uneconomic, and it is the figure carriers will quote you if you ask for a "device payoff quote."

New-carrier incentives. Switch offers commonly include $100 to $800 per line in the form of a prepaid card, bill credit, or device credit, often conditioned on porting in, activating a qualifying plan, and staying 60 to 90 days. These are frequently structured as "up to" amounts with tiered requirements, so read the tiers. A "$800 per line" offer often requires the top-tier unlimited plan and a trade-in.

Net math example. Old carrier: $400 remaining line credit plus $666 device payoff equals roughly $1,066 in costs to leave. New carrier: $500 in switch credits plus a $35 activation fee waiver plus a plan that is $20 per month cheaper across two lines ($480 over 24 months). Net benefit over the remaining term: roughly $1,066 in costs against $500 plus $480 plus $35, or about $1,015 in value. That is close to break-even, which is exactly why the written match offer matters. Getting the new carrier to add $200 to $300 in additional credit flips the decision from marginal to clearly positive.

Timing benchmarks. Ports typically complete in 15 minutes to 24 hours for wireless numbers, and most carriers process them during business hours. Porting on a Friday afternoon or a holiday weekend can leave you without service for a day or more. Port on a Tuesday or Wednesday morning if you can.

Credit application lag. New-carrier promotional credits often do not appear on the first bill. Expect a 1 to 3 billing cycle lag, and expect the first bill to be higher than quoted. Budget for one full cycle at the undiscounted rate.

Trade-offs and alternatives

Switching is not always the right answer, and the trade-off analysis should be explicit rather than emotional.

Switch now versus wait out the term. If remaining promotional value plus device payoff exceeds the new carrier's total offer, waiting is usually cheaper. Waiting also preserves your leverage, because a carrier that knows you are 3 months from term end will often offer a retention credit to keep you. Retention offers commonly run $100 to $400 per line in one-time credits or a plan rate reduction for 12 months. Ask for retention before you ask for a port.

Port one line versus all lines. If you have three or more lines and only one is out of term, porting the out-of-term line first lets you test the new carrier's network, billing, and customer service while keeping the promotional credits on the remaining lines intact. This is the lowest-risk sequencing and it is underused.

New carrier match versus new carrier discount. A match offer protects your promotional value; a discount offer lowers your ongoing rate. The best outcome is both, and they are negotiated separately. Ask for the rate first, then ask for the credit to cover remaining promotional value. Bundling the asks into one conversation usually gets you a worse result on both.

Buyout offers. Some carriers will reimburse your old device payoff or early termination fees via a prepaid card, typically $200 to $800 per line, conditioned on trade-in and a 60- to 90-day stay. These are real and worth pursuing, but they are reimbursements, not instant credits. You pay the payoff first and get the card weeks later. Cash flow matters here.

Staying and renegotiating. If your current carrier will not budge and the new carrier's offer is thin, the third option is to stay, drop to a lower-cost plan tier if your usage allows, and re-evaluate in 6 to 12 months when more of the device balance has amortized. This is unglamorous but often the highest expected value.

One more trade-off worth naming: promotional pricing is often tied to a specific plan tier. If you downgrade your plan to save money, you may void the promotional credit entirely, because the credit's terms can require the qualifying plan to remain active. Read the terms before you change tiers, not after.

Common pitfalls and how to avoid them

Pitfall: cancelling the old service first. This is the most common and most damaging error. Cancelling releases the number and can delay the port by days. Let the port close the account. Avoid it by never calling to cancel until the new carrier confirms the port is complete.

Pitfall: porting on day 1 or 2 of the billing cycle. You consume a full month of service and risk reversal of the cycle's credit. Avoid it by porting on day 27 or 28 of a 30-day cycle.

Pitfall: assuming the promotion follows the number. It almost never does. Credits live in the old carrier's billing system. Avoid it by getting the credit classification in writing before you port.

Pitfall: accepting a verbal match offer. A representative's verbal promise is not enforceable and often not recorded in the account notes. Avoid it by requesting the offer in writing via chat or email, and by saving the transcript. If they will not put it in writing, treat it as zero.

Pitfall: ignoring the device payoff. The payoff quote is the number that most often kills a switch, and it is easy to forget because it appears on the final bill, not at the point of sale. Avoid it by requesting a written payoff quote for every financed device before you authorize the port.

Pitfall: missing the switch-credit conditions. Switch credits commonly require a specific plan tier, a trade-in, autopay enrollment, and a 60- to 90-day stay. Missing any one condition voids the credit. Avoid it by reading the offer's terms and setting a calendar reminder for the stay period end.

Pitfall: not budgeting for the first bill. The first bill from a new carrier is usually the highest, because promotional credits lag and activation fees may apply. Avoid it by setting aside one full cycle at the undiscounted rate.

Pitfall: porting during a holiday or weekend. Ports can stall, leaving you without service. Avoid it by porting on a weekday morning.

Pitfall: letting the old account go delinquent during the port. An unpaid balance on the old account can block the port. Avoid it by settling any past-due amount before you initiate.

Pitfall: forgetting the number-transfer PIN. Most carriers require a transfer PIN and account number to port. Avoid it by requesting both from the old carrier before you start, and by confirming they are still valid the day of the port.

Related questions

Does my promotional pricing transfer to the new carrier automatically?

No. Promotional credits live in the old carrier's billing system and generally terminate when the account closes. The new carrier must issue its own credit to replace the value. Get that commitment in writing before you port.

What happens to my device installment if I switch carriers?

The remaining installment balance typically becomes due in full on your final bill, and future promotional credits stop. Request a written payoff quote for every financed device before authorizing the port.

Can I keep my number and my promotion at the same time?

You can keep the number, but the promotion usually does not follow it. The workable path is to have the new carrier issue a credit that covers the remaining promotional value, which is a negotiation, not an automatic transfer.

When is the best day of the billing cycle to port?

Day 27 or 28 of a 30-day cycle. Porting early in the cycle consumes a full month of service and can reverse the cycle's credit. Late-cycle ports produce a small, predictable final bill.

Will my old carrier offer a retention credit if I ask?

Often yes. Retention offers commonly run $100 to $400 per line in one-time credits or a 12-month rate reduction. Ask before you initiate a port, and get any offer in writing.

FAQ

Can I switch carriers and keep my promotional pricing in 2027?

You cannot literally transfer the old promotion, but you can preserve its value by having the new carrier issue a written credit, waived fees, or a lower rate that offsets the remaining promotional amount. Do the math on remaining credit value plus device payoff, then negotiate against that number before porting.

What is the biggest reason people lose promotional pricing when switching?

Cancelling the old service before the port completes, or porting early in the billing cycle. Both cause the old account to close in a way that forfeits remaining credits. Let the port close the account, and time it for day 27 or 28 of the cycle.

Do device promotional credits survive a carrier switch?

Generally no. Device credits are tied to the installment plan, and leaving early usually triggers the remaining balance due plus forfeiture of future credits. Ask for a written payoff quote and factor it into the switch decision.

How do I get a new carrier to match my old promotional pricing?

Ask specifically for a credit covering your remaining promotional value, separate from the rate negotiation. Request it in writing via chat or email, and confirm the conditions, including plan tier, trade-in, and stay period. Verbal promises are not enforceable.

How long does a number port take?

Typically 15 minutes to 24 hours for wireless numbers, and most complete during business hours. Port on a weekday morning to avoid weekend and holiday delays that can leave you without service.

What should I do if my promotional credit disappears after the switch?

Contact the old carrier immediately and request a written explanation of the credit terms and the final bill breakdown. If the credit was account-level, it likely terminated correctly on account closure. If it was line-level or device-attached and you believe it was applied incorrectly, escalate through the carrier's formal complaint process and, if unresolved, a consumer protection agency.

Sources

• https://www.fcc.gov/consumers/guides/porting-phone-number
• https://www.fcc.gov/consumers/guides/early-termination-fees
• https://www.consumer.ftc.gov/articles/phone-service-billing
• https://www.cfpb.gov/ask-cfpb/
• https://www.ftc.gov/business-guidance/resources/advertising-marketing-internet-rules-road
• https://www.fcc.gov/general/cellular-telephone-service
• https://www.usa.gov/phone-service-complaints

Related on PULSE

• How to calculate the true cost of switching carriers mid-term
• Device installment payoff versus early termination fees: what actually applies
• Retention offers: how to ask and what to expect
• Porting timelines and how to avoid service gaps
• Reading carrier promotional terms: account-level versus line-level credits
• When staying with your current carrier is the cheaper decision