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A phone advertised as “free” can cost more than buying an iPhone outright when its credits require a pricier plan, a new line, a qualifying trade-in, or months of continued service.
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The total-cost formula
For a fixed comparison period, calculate each offer with one consistent formula:
All-in cost = upfront taxes and fees + net device payments during the period + required service-plan charges during the period + other required charges − trade-in and bill credits actually received
#1 Best Overall
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Use the same period for every offer, such as 24 or 36 months. If one installment plan lasts 24 months and another lasts 36, show both periods or calculate both offers over a common period. A monthly device payment by itself is not a meaningful price because it omits the service plan and may assume credits that are conditional.
The calculation is for the United States. Carrier promotions, taxes, fees, eligibility rules, and device prices can change, so verify the current agreement and checkout totals before ordering.
Collect these numbers before comparing offers
Make a worksheet for every route you are considering. Record the exact figure and the condition attached to it rather than copying only the advertised monthly payment.
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1. Exact phone and storage
- Write down the model, storage capacity, color if it changes the listing, and full retail price.
- Do not compare a 128 GB model with a 256 GB model simply because their monthly payments look similar.
- Record whether the quoted price is for a new device, a certified pre-owned device, or a lease.
2. Trade-in value for your actual device
- Use the value for your phone’s precise model, storage, condition, and region.
- Note whether the value is an immediate discount at checkout, a gift-card-style credit, or monthly bill credits.
- Record inspection requirements. A carrier may reduce or deny the advertised value if the device fails its condition rules.
- Never treat a published “up to” amount as guaranteed until the carrier accepts your device.
3. Device payment or lease terms
- Capture the amount due at signing, installment amount, number of installments, and total financed amount.
- For a lease, record the lease term, return or buyout requirement, upgrade conditions, and any end-of-term payment.
- Find out whether an early payoff ends credits, leaves a balance, or changes the amount you owe.
4. Required wireless plan
- Use the price for your actual number of lines, taxes and fees as applicable, and the service features you genuinely need.
- Identify whether the offer requires a new line, a particular tier, an age-based plan, or a new-customer status.
- If the promotion requires a more expensive plan than your realistic alternative, include the price difference for every month of the comparison period.
5. Credit schedule and eligibility
- Write down the credit amount per month, total number of credits, and the first billing cycle in which credits should appear.
- List every condition: qualifying trade-in, plan tier, line status, account standing, activation deadline, and required service duration.
- Record what happens if you change plans, suspend a line, cancel service, pay off the phone, or upgrade early.
6. Upfront and separate charges
- Include sales tax, activation or upgrade fees, shipping, regulatory charges, and any required down payment.
- Check whether taxes are charged on the full retail price or on a discounted amount in your jurisdiction.
- Separate one-time charges from recurring charges so you do not accidentally count either category twice.
7. Flexibility terms
- Check whether the phone is locked and when it becomes eligible for unlocking.
- Find the remaining device balance and unearned credits if you leave before the scheduled end date.
- Confirm whether the device can be used on another carrier and whether a lease must be returned rather than kept.
Choose one comparison period and one service package
Your result changes when the time horizon changes. A customer who keeps a phone for three years should not compare a three-year carrier cost with a 12-month Apple financing calculation. Run at least two horizons when your plans are uncertain:
| Horizon | Useful for | What to include |
|---|---|---|
| 12 months | Testing an early switch or upgrade | Payments made, credits received, upfront charges, and any payoff or return cost at month 12 |
| 24 months | Comparing common two-year ownership plans | All service and device costs through month 24, plus any balance or forfeited credits |
| 36 months | Evaluating longer carrier installments | Three years of plan charges, credits, and device payments, with the remaining balance if you leave sooner |
Keep the service package constant. If you currently need four lines with a particular data allowance, do not make one offer look cheaper by pricing only one line or by removing features you would otherwise pay for. Conversely, do not add a premium plan you would never choose merely to qualify for a promotion.
Handle trade-ins and bill credits correctly
Immediate trade-in credit
An immediate trade-in discount reduces the amount financed at the beginning. For example, a $1,099 phone with a $300 accepted trade-in leaves $799 to finance before taxes and fees. The reduction occurs once, so subtract it once in your worksheet.
Apple describes its Trade In process as applying the value of the old device toward a new iPhone. The financed amount decreases by the value received. That is different from a carrier promotion that sends credits on future bills.
Monthly bill credits
A carrier may show a small or zero device payment because a promotional credit offsets the regular installment each month. Count only the credits that arrive during your chosen period. If the offer promises 36 credits but you leave after 18 months, count 18 credits, then include the remaining device balance and any lost credits in the exit calculation.
Rank #2
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Do not assume that paying the device off early preserves the promotion. Some agreements stop credits when the installment account closes; others require the line and plan to remain eligible. The offer’s written terms control.
Credit timing and failed eligibility
Credits may begin after activation, after a trade-in inspection, or after one or more billing cycles. Show the expected first-credit month in your worksheet. If a credit is delayed, your initial bills may be higher than the advertised amount.
Model a failure case as well as the best case. If a trade-in is rejected or a plan change ends eligibility, replace the promotional credit with the regular device payment from that point forward. This shows the financial exposure instead of assuming perfect compliance for three years.
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Include the plan premium, not just the phone price
The most common comparison error is calling a phone free when the promotion requires a more expensive service plan. Calculate the incremental plan cost:
Required-plan premium = promotional plan price − realistic alternative plan price
Multiply that premium by every month you must remain eligible. A $25 monthly premium over 36 months is $900, which can exceed the phone discount. Use your own line count and existing plan; a one-line illustration does not automatically apply to a family account.
Also include charges tied to adding a line. A “new line” requirement can create a recurring cost even if you already have service. If the line is unnecessary, the entire line charge belongs in the deal’s cost.
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Buying from Apple with a trade-in
With an Apple purchase, an accepted trade-in can reduce the amount financed at the start. Compare the resulting device balance with the same phone’s balance under a carrier promotion. Keep the service plan separate if you are bringing your own service or choosing a plan that is not tied to the phone discount.
Rank #3
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Apple’s current buying guidance says an iPhone purchased from Apple outright or through Apple financing is unlocked. Confirm the status for the specific transaction because purchase routes and carrier policies can change.
Apple Card Monthly Installments
Apple describes Apple Card Monthly Installments (ACMI) as a 0% APR option subject to credit approval and available credit. For an iPhone, Apple says you select an eligible carrier at checkout; prepaid plans are not supported.
Do not treat the installment amount as the complete monthly cost. Apple says taxes and shipping are not included in the installment amount and are billed separately to the Apple Card. Those separate charges may be subject to the card’s variable APR. Apple’s legal installment terms also describe taxes and fees on the full retail price and possible carrier fees. Use the actual checkout amounts in your worksheet.
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Carrier deals commonly combine a device installment with monthly bill credits. The correct comparison includes the qualifying plan, line requirements, trade-in condition rules, number of credit installments, and consequences of leaving early.
Credit amounts and requirements change by offer and date. Do not rely on a headline such as “free iPhone” or on an old promotion. Read the current offer terms for your account, model, storage, trade-in, and plan before assigning a credit to your calculation.
Apple Upgrade leasing
Apple announced Apple Upgrade in the United States in July 2026 as a leasing option. Eligible trade-in credit can reduce lease payments, but a lease is not the same as owning the phone through installments. Compare the full lease term, return condition, upgrade timing, and any buyout or end-of-term obligation with your intended ownership period.
Apple says eligible participants in its prior iPhone Upgrade Program may have several routes, including Apple Upgrade, ACMI, outright purchase, or carrier financing. Choose the route that matches whether you want to own the phone, return it, or upgrade on a defined schedule.
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Rank #4
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Step-by-step worksheet
- Define the baseline. Write the exact iPhone model and storage, your line count, the service features you need, and the period you will compare.
- List each route. Create columns for Apple purchase, ACMI, each carrier offer you qualify for, and Apple Upgrade if available.
- Enter the undiscounted device cost. Record full retail price, installment term, lease term, and amount due at signing.
- Enter the trade-in result. Use the value for your actual device and condition. Mark it as immediate or monthly.
- Enter the credit schedule. Record the monthly amount, first expected credit, final credit, and every eligibility condition.
- Price the service. Add the required plan for your actual lines. Add the premium over your realistic alternative when the promotion requires a costlier plan.
- Add separate charges. Include taxes, shipping, activation or upgrade fees, and other mandatory charges in the month they are billed.
- Calculate each month. Sum device payment, service charge, and other recurring charges; subtract only credits scheduled and received in that month.
- Test an early exit. At the month you might switch or upgrade, add the remaining device balance and subtract only credits already earned. Include lease return or buyout costs.
- Check flexibility. Record lock status, unlock timing, and whether a payoff or plan change ends credits.
- Verify before purchase. Compare your worksheet with the final checkout screen, trade-in confirmation, and carrier agreement.
Worked examples
Example: an immediate trade-in versus a plan-dependent credit
Assume the same iPhone has a $1,099 retail price. Route A accepts a $300 trade-in immediately, leaving $799 to finance. Route B finances the full $1,099 but offers $30 monthly credits for 36 months, or $1,080 in scheduled credits, provided you keep a qualifying plan and line for the full term.
| Item | Route A: immediate trade-in | Route B: monthly credits |
|---|---|---|
| Starting device amount | $799 after the accepted $300 trade-in | $1,099 |
| Credit timing | At purchase | $30 per month for 36 months if eligible |
| Plan condition | Use the plan you otherwise choose | Qualifying plan and line required |
| Risk if leaving after 18 months | No future trade-in credit to lose | 18 credits received; remaining balance and unearned credits must be calculated |
Route B appears to save more on the device, but it can cost more overall if its plan is $25 per month above your alternative. That premium would be $900 over 36 months. Add taxes, fees, and any remaining balance before deciding.
Example: comparing two terms over a common period
Suppose one carrier uses 24 monthly installments and another uses 36. If you expect to keep service for 24 months, calculate both offers through month 24. For the 36-month offer, show the unpaid device balance and the 12 months of credits you would forfeit if leaving at month 24. If you expect to stay 36 months, calculate the full period instead. The “cheaper monthly payment” is not a result until the same horizon is applied.
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A published three-year illustration—and its limits
Kiplinger’s October 2026 comparison reported illustrative three-year costs for one line and an iPhone 18 Pro scenario:
| Plan in the scenario | Reported three-year cost |
|---|---|
| T-Mobile Essential Savers 2.0 | $3,000 |
| T-Mobile 55+ Essential Choice 55 2.0 | $2,460 |
| Verizon Simplicity Plan | $2,280 |
| AT&T Value 2.0 | $2,640 |
In that specific scenario, Kiplinger estimated possible three-year savings of $600 between the two T-Mobile examples and $360 for the AT&T example when selecting a lower-cost plan. These are publisher-reported figures for the stated one-line scenario, not universal carrier savings or a current quote for every account. Check live plan prices, eligibility, taxes, fees, device credits, and your line count before using them.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happens if you switch, cancel, or upgrade early?
Changing plans
A plan change can remove eligibility even when the new plan is offered by the same carrier. Before changing, ask whether the current credit schedule survives, whether a minimum tier is required, and whether the change takes effect immediately or at the next billing cycle.
Canceling service or moving to another carrier
List the device balance due on the cancellation date. Then remove all future credits from your calculation. A phone that was projected to cost $0 after credits may require a substantial payoff when service ends before the credit term.
Upgrading early
An early upgrade may require paying the remaining installments, returning a leased phone in specified condition, or surrendering future credits. Compare the upgrade route with simply keeping the current phone through the original term.
Best Value
- Powerful Performance: Apple’s A18 Pro chip with a 6-core CPU, 6-core GPU, and 16-core Neural Engine for fast responsiveness and efficient multitasking.
- Brilliant Display: 6.3-inch Super Retina XDR OLED with ProMotion technology (up to 120 Hz), Always-On display, True Tone, and high peak brightness for rich, smooth visuals.
- Pro-Level Camera System: Triple rear cameras — 48 MP Fusion main, 48 MP Ultra-Wide, and 12 MP telephoto with up to 5× optical zoom and advanced imaging features like Photonic Engine and Smart HDR.
- Natural Titanium Design: Premium aerospace-grade titanium build with a textured matte glass back and Ceramic Shield front for durability and elegant styling.
- Unlocked & 5G-Ready: Fully unlocked for use with major US carriers (supports eSIM) and future-ready 5G connectivity.
Trade-in inspection problems
If the carrier lowers the trade-in value after inspection, replace the advertised credit with the accepted amount and recalculate every installment. Keep photos, serial numbers, shipment tracking, and the inspection result until the credit appears on your bill.
Device locks and switching flexibility
Lock status affects the value of a deal because a phone that cannot be used on another network limits your options. Apple’s current buying guidance says iPhones bought from Apple outright or through Apple financing are unlocked. Apple’s store FAQ says an iPhone financed through AT&T’s Installment Plan, T-Mobile’s Equipment Installment Plan, or Verizon’s Device Payment Program is locked until paid in full. Confirm the terms for the exact transaction, since carrier rules can change.
Record the unlock policy beside the financial result. A slightly higher total cost may be worthwhile if it keeps you free to change carriers, while a lower cost with a long lock period may be unsuitable if you expect to move.
Taxes, fees, and charges outside the monthly payment
Monthly device figures often exclude amounts due at checkout. Add sales tax, shipping, activation or upgrade fees, and any down payment. Apple’s ACMI materials state that taxes and shipping are billed separately from the installment amount; the legal installment terms also address taxes and fees on the full retail price and possible carrier fees.
Enter each charge once, in the month it is due. If a carrier advertises a waived activation fee only for online orders or a particular customer category, treat the waiver as conditional until your checkout confirms it.
Common mistakes that make a deal look cheaper
- Comparing phone payments without service. Add the required plan for the full period.
- Subtracting a trade-in twice. An immediate credit lowers the financed amount; do not subtract it again from later installments.
- Counting maximum values. Use the accepted value for your exact device and condition, not an “up to” amount.
- Assuming every credit is guaranteed. Mark credits as conditional when they depend on a plan, line, trade-in, or continued service.
- Ignoring the first billing cycle. Delayed credits can make early bills higher than the advertisement.
- Mixing time horizons. Compare 24 months with 24 months or show the remaining balance when terms differ.
- Forgetting taxes and fees. Separate charges may not appear in the monthly device figure.
- Ignoring lock status. A locked phone can reduce your ability to switch carriers.
- Using a one-line example for a family account. Recalculate with your actual number of lines.
- Calling a lease ownership. Include return, buyout, and upgrade conditions before comparing it with a purchase.
Decision framework: which route fits your situation?
| If you value… | Examine first | Questions to answer |
|---|---|---|
| Lowest predictable device cost | Outright purchase or immediate trade-in | What is the accepted trade-in value, and what taxes and fees are due now? |
| Fixed payments with no carrier lock | Apple financing | Do you qualify for ACMI, and what separate taxes, shipping, and carrier charges apply? |
| Maximum advertised discount | Carrier bill-credit promotion | What plan and line are required, and what do I owe if I leave early? |
| Frequent upgrades | Apple Upgrade or another defined upgrade route | Is it a lease, what is the full term, and are there return or buyout conditions? |
| Freedom to change carriers | Unlocked purchase route | When is the phone unlocked, and does paying early affect credits? |
Choose the lowest all-in cost that also meets your service needs and flexibility requirements. A mathematically lower offer is not a saving if it requires a plan, line, or ownership arrangement you would not otherwise choose.
Final checklist before accepting an iPhone deal
- Same model and storage entered for every offer.
- Same service package and line count used throughout.
- Comparison period stated clearly.
- Trade-in value confirmed for the exact device and condition.
- Immediate credits separated from monthly bill credits.
- Credit amount, start date, duration, and eligibility conditions recorded.
- Required plan premium multiplied by the full eligibility period.
- Taxes, shipping, activation, upgrade, and other fees included.
- Remaining balance and lost credits calculated for an early exit.
- Lock and unlock terms checked.
- Lease return or buyout terms included where applicable.
- Final checkout and agreement match the worksheet.
The bottom line
Compare the complete service-and-device package, not the promotional phone payment. The reliable answer comes from one common time period, your actual plan and line requirements, accepted trade-in value, credits you can realistically earn, upfront charges, and the cost of leaving early. Once those items are in the same worksheet, “free” and “$0 per month” become claims you can test rather than prices you have to trust.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
