Devices & Contracts

“Free iPhone.” “We’ll pay off your old phone.” “$0 today.” If the mobile aisle feels like a candy store, that’s by design. Modern device deals are a mash-up of credit, conditional discounts, and ownership rules hiding behind glossy banners. The monthly number looks harmless; the legal plumbing is not. In this guide, I’ll decode how phone financing actually works in 2025, why that “free” phone is rarely free, what “unlocking” really changes (and doesn’t), how trade-in credits can vanish, where early termination fees still lurk, and the exact paperwork you need if you want to switch without getting dinged.

The modern phone deal: what you’re actually signing

The most common U.S. offer today is a retail installment sale for the full device price at 0% APR, paired with promotional bill credits that drip onto your account each month as long as you keep the line, plan, and financing open. In legal terms, the installment contract is real credit and it carries its own disclosures; the bill credits are a separate, revocable discount tied to ongoing conditions. Carriers explain this in their own materials: for example, AT&T’s support and trade-in pages state that credits are applied monthly for the term and can take multiple billing cycles to start. (AT&T, AT&T Trade-In)

Under the hood, the installment agreement usually gives the seller a purchase-money security interest (PMSI) in the phone. A PMSI is a creditor’s lien on the very thing you’re buying; it’s how they keep a legal claim to the device (and even its resale proceeds) until you finish paying. AT&T’s installment terms say this out loud—“You grant us a purchase money security interest in the Device, and all proceeds”—language drawn from the Uniform Commercial Code. If you try to sell or trade a still-financed phone, that lien can bite you. (AT&T, Wolters Kluwer)

Promotional credits add a second trap door: early payoff or account changes can shut the credits off even if you keep the phone. T-Mobile’s offer pages include the classic line, “Bill credits end if you pay off device early,” and similar conditions appear across carriers. That’s why paying off a “free with 24 credits” phone on month six often turns a bargain into an overpay. (T-Mobile)

Ownership during financing: the lien, the lock, and the illusion of freedom

People assume “my name is on the bill, so it’s my phone.” Legally, it’s more like “your phone, subject to a lien.” The PMSI grants “super-priority” to the seller if something goes wrong—a concept corporate lawyers teach with casebooks but that now lives in everyday consumer contracts. Tech publications have begun warning about practical consequences: buyers discovering mid-promo that lien language blocks resale or trade for a different offer. The story may be anecdotal, but the mechanism is real and visible in the contracts themselves. (TechRadar, AT&T, Wolters Kluwer)

Unlocking adds confusion. An unlocked phone simply has its carrier restrictions removed so it can accept other carriers’ SIMs or eSIMs. That change affects the software lock—not the lien or your remaining balance. U.S. rules and policies are a patchwork. The FCC’s consumer guidance makes two points clear: carriers do unlock devices, but they may refuse if you still owe money or haven’t met usage or timing thresholds. So a phone can be unlocked and still be encumbered—usable on another network, but not safely saleable without clearing the balance. (Federal Communications Commission)

Unlocking rules in practice: the U.S. minimums and the big-carrier specifics

U.S. “unlocking” is governed by a mix of FCC guidance and carrier commitments. Verizon locks new devices for 60 days and then unlocks them automatically, with exceptions for fraud or theft; prepaid follows the same 60-day timeline after paid activation, and deployed military have a special track. AT&T sets an unlock gate at 60+ days and requires the installment balance to be fully paid and the device clear of fraud flags before it will process a request. T-Mobile generally wants 40 days of active service and the device paid in full; closed accounts must have a $0 balance. These pages move occasionally, but the patterns—short lock period plus “paid off and in good standing”—have been stable. (Verizon, AT&T, T-Mobile)

Internationally, the consumer baseline is stronger. Canada banned unlocking fees and required new phones to be sold unlocked as of December 1, 2017, under the CRTC Wireless Code. The U.K. went further: as of December 2021, Ofcom banned the sale of locked handsets altogether to make switching simpler. Those examples matter because travelers and cross-border buyers sometimes see international advice online and assume it applies in the U.S.—it doesn’t, but it shows where policy could head. (CRTC, www.ofcom.org.uk)

There’s also a live U.S. policy debate. Verizon has argued at the FCC for changes to the 60-day unlocking regime, citing fraud and trafficking concerns; national coverage has tracked those filings, and the Commission has floated proposals that would standardize unlock timing across providers. For consumers, this is mostly noise—today’s 40–60-day unlock windows still apply—but it’s worth knowing that rules here aren’t set in stone. (The Verge)

The “free phone” that stops being free: credits, plan locks, and acceleration clauses

When a banner says “$800 off via 24 credits,” you are being promised a conditional rebate that amortizes across your bill. The conditions typically include keeping the line active on an eligible plan for the full term, keeping the device financing open, staying current on payments, and complying with the trade-in program’s grade and timing rules. Carrier pages say the quiet parts directly: credits may take two or three cycles to begin, and if you cancel or pay off early, the remaining credits stop and the device’s remaining balance becomes due. That’s the “acceleration” clause in plain English. (AT&T Trade-In, T-Mobile)

AT&T’s support articles illustrate the split between the device loan and any legacy service contract. If you still have an old two-year agreement, canceling could add an ETF; if you’re on modern installments, there’s usually no ETF but you’ll owe the remaining device balance and lose any future credits. You’ll also see carrier agreements confirm another gotcha: no proration of monthly service when you cancel mid-cycle. That means your “last month” often bills in full. (AT&T)

Early termination fees: where they still exist and where they don’t

Traditional ETFs haven’t fully disappeared; they’ve just retreated. On wireless, modern consumer lines are mostly month-to-month with installment devices, so canceling today tends to trigger a balance-due on the phone rather than a classic ETF. However, if you’re on a legacy or business service commitment, carriers still publish ETF schedules. In adjacent products—home internet, business lines, some special-commitment promos—ETFs are alive and well and often prorated down over time. Carriers even run ETF-reimbursement promos to steal you from competitors; those reimbursements are real but come with their own eligibility and documentation hoops. (AT&T, T-Mobile)

Verizon’s general customer agreement also underscores the billing reality: cancel anytime, but you’re on the hook through the end of the billing cycle, and promotions tied to that line can unwind when the line closes. Read those lines literally if you’re planning a switch at month-end. (Verizon)

Returns, buyer’s remorse windows, and restocking fees

Day-one regret is protected, but not free. AT&T’s standard wireless policy offers 14 days to return, often with a restocking fee up to $55; some online orders returned within the window may waive that fee, and Apple devices unopened in the box are sometimes treated differently. Verizon allows 30 days with a $50 restocking fee, and T-Mobile’s policy sets a 14-day window with a restocking fee scaled to the device’s retail price. Policies change by channel—corporate store vs. authorized retailer vs. online—and refunds can take weeks to post. These fees and timeframes matter because returning a device usually does not automatically cancel the line; you must terminate or revert the upgrade explicitly, or the line keeps billing. (AT&T, Verizon, T-Mobile)

Trade-ins: grading, timing, and why credits disappear

Trade-in promotions sound simple—send us your old phone, get big credits on a new one—but the moving parts are easy to miss. Most offers require you to ship the trade within a set window, meet a functional condition threshold, and wait two or three billing cycles for credits to begin. If you upgrade again, cancel, or pay off early, remaining credits can stop and the value of your surrendered trade can effectively evaporate. Carriers disclose those mechanics in their terms, but the interplay only becomes obvious when a life event interrupts the 24- or 36-month march. Before you mail a trade, take high-resolution photos of the device, record the IMEI, keep the drop-off receipt, and screenshot the offer’s exact code and fine print. If grading comes back lower than expected, those artifacts are your leverage. (AT&T Trade-In)

Leases and “forever” programs: when you don’t own the device at all

Leases still exist under different branding. JUMP! On Demand is a T-Mobile lease with an 18-month term and a purchase option price at the end. If you do nothing, that purchase price can auto-post to your bill after the lease ends. Sprint’s old Flex Lease produced similar questions after the T-Mobile merger: customers could return and upgrade, or buy the phone by paying a lump sum or rolling into purchase-option installments. The lesson is that a lease is not a loan; until you exercise the purchase option, you’re a renter with different return and damage obligations. If you’re on a legacy lease, set calendar reminders for the end-of-term dates and ask for the dollar figure of the purchase option in writing. (T-Mobile, PhoneArena)

Unlocking abroad, traveling, and how international rules shape your options

If you roam internationally or resell across borders, foreign regimes matter. Canada requires carriers to sell devices unlocked and to unlock older devices free on request. The U.K. banned selling locked handsets as of December 2021. Those rules make it easier for Canadians and Britons to switch or gift devices. In the U.S., your phone might be unlocked after 40–60 days, but promo credits and liens follow you across borders; carrying an unpaid U.S. phone into a Canadian sale can create headaches if the PMSI pops up later. (CRTC, www.ofcom.org.uk)

Apple’s upgrade lane: when the lender isn’t your carrier

Apple’s iPhone Upgrade Program is a separate lane: a 24-month, 0% APR installment loan through a bank partner (currently Citizens Pay) plus AppleCare+ bundled in, with the option to upgrade after 12 payments. You’re dealing with Apple and a lender, not carrier bill credits, so the incentives and exit ramps are cleaner, and you can often switch carriers more freely because the phone isn’t encumbered by carrier promo conditions. The flip side is that you must keep the AppleCare+ subscription and satisfy the lender’s terms. (Apple)

Practical exit strategy: how to switch without paying extra

If you want out mid-promo, the safest path is methodical. First, download the installment contract from your carrier portal so you know the exact balance and the language around credits. Next, request an unlock if eligible under your carrier’s policy; a paid-off, unlocked device is simpler to move. Then, if a competitor offers ETF or balance reimbursement, read their submission rules closely—those Mastercards have expiry dates and require a final bill showing the charge you want reimbursed. Finally, time your line closure for just after your billing cycle resets to avoid paying for nearly a full extra month of service you didn’t use. The public pages for carrier unlocks, returns, and “we’ll pay your ETF” programs all spell out the dates and documents; the trick is aligning them. (Verizon, T-Mobile)

Edge cases and gotchas: fraud holds, blacklists, and plan-locked credits

A few corner cases deserve daylight. Devices can be flagged as lost, stolen, or fraudulently purchased; those flags can block unlocking and even activation on other networks. Unlock policies note those exceptions explicitly. Promotions also bind you to specific plans; changing from an unlimited tier to a cheaper plan can silently end the remainder of your device credits. And if you return a phone during the remorse window, the restocking fee and the timing of credit reversals can leave your next bill looking odd—expect a messy couple of cycles before it normalizes. (Verizon, AT&T)

Bottom line

Modern device deals are two contracts stapled together: a true loan secured by the phone itself, and a conditional stream of credits that stop if you deviate. Unlocking is a software switch, not a financial absolution. To stay in control, treat the promo like a long-term pact: document the offer, calendar the key dates, understand the lien, and know your unlock eligibility before you make any move.

Glossary (plain-English, no jargon left unexplained)

Purchase-Money Security Interest (PMSI). A lien that gives the seller or lender a first claim on the phone you’re buying on credit, and sometimes on the cash if you resell it before paying it off. It’s the reason you may be blocked from trading or selling mid-promo without settling the balance. (AT&T, Wolters Kluwer)

Unlocking. Removing carrier software restrictions so the device can be used with another carrier’s SIM or eSIM. It does not erase your debt or lien. U.S. carriers generally unlock after short use periods and confirmation that the device isn’t flagged for fraud and is paid off where required. (Federal Communications Commission, Verizon)

Promotional Bill Credits. A monthly discount applied for a fixed term if you keep the line, plan, and financing intact. If you cancel or pay off early, remaining credits stop. (AT&T Trade-In, T-Mobile)

Early Termination Fee (ETF). A fee for breaking a service contract early. Less common on modern consumer wireless lines, but still present on legacy terms and other products like home internet. Even without an ETF, canceling usually accelerates your remaining device balance. (AT&T)

Acceleration. A clause that makes the rest of your device balance due immediately if you default or cancel. It often coexists with language that stops future bill credits. Evidence shows this in public offer terms and support pages. (T-Mobile)

Lease (vs. Loan). A lease like JUMP! On Demand means you don’t own the phone unless you pay the purchase option at the end. A loan means you do own it, subject to a lien, and gain clear title when the balance hits zero. (T-Mobile)

Buyer’s Remorse Window. The short period—often 14 or 30 days—when you can return a device, usually with a restocking fee, and with separate steps required to cancel or roll back service changes. (AT&T, Verizon)

Sources & further reading

FCC consumer guide on cell-phone unlocking (policy overview, and when balances block unlocks). (Federal Communications Commission)

Verizon device unlocking policy (60-day automatic unlock; fraud and military exceptions). (Verizon)

AT&T unlock eligibility (60+ days; payoff required; lost/stolen/fraud flags). (AT&T)

T-Mobile SIM unlock policy (40-day active use; paid-in-full requirements; $0 balance on canceled accounts). (T-Mobile)

AT&T wireless return policy and fee schedule (14-day window; up to $55 restocking; fee schedule details). (AT&T)

Verizon return policy and FAQs (30-day window; $50 restocking). (Verizon)

T-Mobile return policy (restocking fee bands tied to full retail price; refund timing). (T-Mobile)

AT&T installment plan and trade-in credit timing/terms (security interest; credits applied monthly; delays of 2–3 cycles). (AT&T, AT&T Trade-In)

What a PMSI is under the UCC (plain-English legal explainer). (Wolters Kluwer)

AT&T on installment plan mechanics and payoff (36-month plans; no prepayment penalty; payoff allowed). (AT&T)

Carrier “we’ll pay your ETF/balance” offers and rules (T-Mobile Family Freedom). (T-Mobile)

AT&T ETF support pages and legacy contract language (where ETFs still apply; installment balances vs. ETFs). (AT&T)

Verizon customer agreement on cancellation and billing-cycle proration (charges through end of cycle; promo impacts). (Verizon)

T-Mobile JUMP! On Demand lease end-of-term options (purchase option, auto-post if no action). (T-Mobile)

Apple iPhone Upgrade Program (0% APR via bank partner; upgrade after 12 payments; AppleCare+ required). (Apple)

CRTC Wireless Code: unlocking fee ban and unlocked-by-default in Canada. (CRTC)

Ofcom: ban on selling locked phones in the U.K. (in force since Dec 2021). (www.ofcom.org.uk)

The current policy debate on U.S. unlocking timelines (industry filings and FCC proposals summarized in national tech press). (The Verge)

Tech-press cautionary piece on PMSIs and carrier promos (real-world implication of lien language during promos). (TechRadar)