Verizon, AT&T, and T-Mobile are all advertising trade-in credits up to $1,200 toward an iPhone 18 Pro or Pro Max. That number is real — but it isn't an appraisal of your old phone, and treating it like one can lead to a worse deal than a straightforward cash buyback. Our free, neutral iPhone 18 trade-in value estimator puts both numbers side by side.
iPhone trade-in value calculator 2026: two very different numbers
An independent buyback estimate reflects roughly what your specific phone, in its specific condition, is actually worth on the resale market — for a good-condition iPhone 15, for example, that's in the ballpark of $300. The carrier's "up to $1,200" figure is a different kind of number entirely: it's the same maximum regardless of which eligible phone you trade in. AT&T's own promotion, for instance, offers its top credit for a qualifying iPhone "in any condition."
Carrier trade-in vs cash buyback: what the $1,200 actually requires
The catch, usually a few paragraphs into coverage of these promotions: the top credit typically requires a new or upgraded line on a premium, unlimited-tier plan, and it's usually paid out as bill credits spread across 24-36 months — not upfront. Leave that carrier before the credits finish and you forfeit what's left. You'll also still pay activation fees (often $35-40) and sales tax calculated on the phone's full retail price.
How much is my iPhone worth for iPhone 18: the honest answer
It depends what you're comparing it to. If you were already planning to commit to that carrier's premium plan and stay on it for a few years, the promotional credit can genuinely be worth more than a cash buyback. If you just want your old phone's actual value with no strings attached, an independent buyback service will typically pay less in absolute dollars but pay it immediately, in cash, with no plan commitment.
Why this estimator doesn't name a winner
We deliberately don't link to or favor any specific carrier or buyback company here — the right choice depends on whether you already want to be on a premium plan with a specific carrier, which isn't something a calculator can know for you. What it can do is make sure you're comparing the real numbers instead of one number that isn't really comparable to the other.
Try the iPhone 18 Trade-In Value Estimator →
Sources: Yahoo Finance, "How Apple's iPhone 18 price increases impact your trade-in value at Verizon, T-Mobile, or AT&T"; carrier promotional terms (AT&T, Verizon, T-Mobile official pages), cross-checked 2026-09; third-party buyback value data, aggregated 2026-06. This is general consumer information, not financial advice.
