Black Friday 2026 Phone Deals: How to Read the Fine Print

How carrier bill credits actually work

When a carrier advertises a discount on a phone, you normally still buy the phone at full price on a 0% installment plan. The discount comes back to you as a credit on each monthly bill. The credit and the installment cancel out, so the phone looks free on paper.

The length of that arrangement is the first number to find. Verizon's device payment FAQ says its smartphone agreements run 36 monthly installments at 0% APR. AT&T's installment plan terms split the price into 30 monthly payments. T-Mobile's current promotional offer details mostly pay credits over 36 months, with some retailer offers over 24.

Credits also start late. T-Mobile says they can take two bill cycles to appear, Verizon says one to two, and AT&T's trade-in terms say they begin within three bills, followed by catch-up credits. Expect to pay the full installment for the first month or two.

For a deeper look at the installment side of this, see our explainer on how carrier device financing works.

The strings attached to most deals

New line or port-in requirements

Many of the largest discounts are reserved for new lines or for customers who bring a number from another carrier. T-Mobile's offer terms routinely list a new line or a port-in from AT&T, Verizon or another carrier as a condition. Existing customers upgrading a current line often see smaller offers.

AT&T adds a timing rule. Its promotion eligibility page says that if you cancel a new line within 90 days of activation, the smartphone credits tied to it end.

Required premium unlimited tiers

The biggest credits are usually tied to the carrier's most expensive plans. T-Mobile's offers name specific plan tiers and a minimum monthly price with AutoPay, and some exclude discounted plans for 55+, military, first responder and student customers. Verizon's device payment FAQ warns that switching from Unlimited Ultimate to another plan forfeits remaining promotional value, and its trade-in FAQ says myPlan promotions require the line to stay on myPlan for 36 months.

AT&T requires the line to stay on a qualifying unlimited plan. Its eligibility page gives you 30 days from a notification text to switch back before credits end for good.

Trade-in condition rules

Trade-in deals have their own fine print. T-Mobile's promotional trade-in page requires the old phone to be paid off, in good working condition, and with Find My iPhone or Android anti-theft turned off. You get 30 days from receiving the new phone to send the old one.

If the phone fails inspection, T-Mobile says you get a partial value and are generally no longer eligible for most promotions. Verizon says it adjusts credit to the final appraised value and that a device still under activation lock can get less. Some offers accept "any condition" trade-ins and others require "good condition," so check which one you are signing up for.

Activation fees and taxes on the full price

One-time charges vary by carrier and change often, so check the checkout total rather than the ad.

• T-Mobile: Its Broadband Facts labels list a $35 device connection charge per line, and most current offers require it at the time of sale.
• AT&T: Its first-bill guide says a first bill may include activation and other one-time fees, plus partial-month charges and a month billed in advance.
• Verizon: Its device payment FAQ says an upgrade fee applies. Droid Life reported in June 2026 that Verizon customers who opt in to its free loyalty program can skip activation and upgrade fees.

Sales tax is the cost people forget. T-Mobile's offer terms say tax on the pre-credit price is due at sale. On a phone that is "free after credits," you can still owe sales tax on the full retail price on day one.

Monthly fees matter too. T-Mobile's labels list a Regulatory Programs and Telco Recovery Fee of $5.49 per voice line on most plans, plus taxes that vary by location. Our guide to trading in versus selling your old phone covers how to compare a trade-in credit with cash in hand.

Locking, unlocking and leaving early

What happens if you leave

This is the part that turns a good deal into an expensive one. If you cancel service, the remaining device balance comes due, and the credits stop.

• Verizon: Disconnecting a line with an active device payment agreement puts the remaining balance on your next bill. Paying the device off early ends its monthly promotional credits.
• AT&T: Its installment terms say the remaining balance is due if service is cancelled. Its trade-in terms say cancelling ends credits and that early upgrades or early payoff may stop them.
• T-Mobile: Its offers say to contact T-Mobile before cancelling the entire account to keep remaining credits. Otherwise, credits stop and the financed balance is due. Paying off early also ends credits.

Your number is still yours to take. The FCC says your old carrier cannot refuse to port your number because you owe a balance, though you still owe it.

Device locking and unlock waits

A financed phone is locked to the carrier that sold it. Verizon's policy says postpaid phones unlock automatically once paid off, but if you pay the balance with a Verizon gift card, unlocking is delayed 35 days. AT&T requires the device to be paid off and purchased more than 60 days earlier. T-Mobile requires 40 days of activity on its network and full payment.

Put together, a 36-month promo usually means a phone that works on one network for three years unless you pay off the remainder. Our step-by-step guide to unlocking a phone on any carrier covers the request process.

Deal math: a worked example

1. Monthly credit: $1,000 ÷ 36 = about $27.78 a month.
2. Extra plan cost: $20 × 36 months = $720.
3. Extra up-front cost: the $35 connection charge.
4. Net saving if you stay all 36 months: $1,000 − $720 − $35 = $245.

That is a real saving, but a quarter of what the ad suggests. The "free" phone also is not free on day one: at 7%, you still owe about $70 in sales tax on the full price, plus the $35 charge.

Now suppose you leave after 12 months. You received about $333 in credits and paid $240 extra for the plan plus $35 up front. The remaining $667 device balance comes due. You end up only about $58 ahead of the unlocked baseline, and you spent a year on a plan you did not want.

Change one input and the deal flips. If the required plan costs $30 more a month instead of $20, the extra plan cost over 36 months is $1,080, and you lose money even if you stay the whole time.

The fine-print checklist

Take this list to the offer terms page, the store, or the chat window before you check out.

How to prepare before November 27

1. Write down your current cost. Pull your last full bill and note your plan price, fees and taxes per line.
2. Check your old phone. Confirm it is paid off, note its condition honestly, and know how to turn off Find My or anti-theft.
3. Get your transfer details ready. If you plan to switch carriers, find your account number and number transfer PIN, and do not cancel your old service before the port completes.
4. Price the unlocked alternative. Look up what the phone costs unlocked so you have a baseline for the deal math.
5. Read the offer terms page, not the banner. Each carrier publishes offer details. Look for the credit term, plan requirement and cancellation language.
6. Screenshot the terms at checkout. Terms say offers are limited-time and subject to change, so keep a record of what you accepted.

Switcher offers deserve their own scrutiny. When we checked on October 30, T-Mobile was running a switcher offer that pays off a prior carrier balance on a virtual prepaid Mastercard, not as cash. That card expires in six months, and you must submit proof of your old balance within 30 days of porting. Expect similar paperwork rules on any holiday switcher offer.