iPhone 17 Pro Max IMEI Check: A3257 and Lock Status
No tray to read, a 2 TB option no other 17 has, and two sets of lock counts. Here is how to match the phone and what our lookups showed.
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The big Pro, and the only one with 2 TB
Apple introduced the iPhone 17 Pro Max in 2025. Apple's "Identify your iPhone model" page (read 10 November 2026) lists a 6.9-inch Super Retina XDR display with the Dynamic Island, three rear cameras (Fusion Ultra Wide, Fusion Main, Fusion Telephoto) with a LiDAR Scanner, and capacities of 256 GB, 512 GB, 1 TB and 2 TB in Silver, Cosmic Orange and Deep Blue.
Two mix-ups are common: a 6.3-inch 17 Pro described as a Pro Max, and last year's 16 Pro Max sold as new. Apple's own wording helps: the Pro Max back is "textured matte back glass", and 2 TB exists only on this model.
| A-number | Sold in | Checked on FullIMEI (90 days) |
|---|---|---|
| A3257 | United States, Puerto Rico | 66 devices |
| A3526 | Other countries and regions | 17 devices |
| A3525 | Canada, Japan, Mexico, Saudi Arabia, Gulf states and others | under 10 |
| A3527 | Mainland China | under 10 |
Two ways our checker reads this phone
Counts are distinct handsets seen between 12 August and 10 November 2026. When a lookup returned the A-number, 66 phones were A3257:
| A3257 result | Devices | Share of 66 |
|---|---|---|
| Locked to a carrier we read | 19 | 29 % |
| Unlocked | 11 | 17 % |
| Unknown (lock not readable for free) | 36 | 55 % |
A separate group of 139 lookups identified the phone by name only, with no A-number. Those read 91 locked and 48 unlocked, and 119 came from the United States. Two-thirds locked is a very different picture, but it is a different kind of lookup: these were answered from carrier data, so they lean towards phones that sit on T-Mobile or Metro. We do not merge the two groups.
Compare the older 15 Pro Max page if you are choosing between generations.
Sixteen from Pakistan
The A3257 lookups came from the United States (29) and Pakistan (16). A phone built for the US market that is checked in Pakistan is usually on its way to a second owner. That owner cannot walk into the original carrier's store, so the lock question has to be settled before the sale.
Checks before paying for a 17 Pro Max
- Open Settings, General, About. The Model Number for a US phone is A3257; the Capacity must be 256 GB or more.
- Compare the screen to the listing: a 6.9-inch display. If the phone feels small, ask whether it is a 6.3-inch 17 Pro.
- Look for the Cosmic Orange, Silver or Deep Blue finish. Apple lists no other colour.
- Run the IMEI here, then a blacklist check. Ask the seller to sign out of Apple Account in front of you, as in the iCloud lock steps.
Specs and model numbers are Apple's; the counts are ours and cover only phones checked on this site. For the base model see iPhone 17.
Questions people ask
What is the model number of a US iPhone 17 Pro Max?
Apple lists A3257 for the United States and Puerto Rico. A3525 covers Canada, Japan, Mexico, Saudi Arabia and several Gulf states, A3527 is mainland China, and A3526 is every other country and region.
Does the iPhone 17 Pro Max have a SIM tray?
Not in the United States, Puerto Rico or the other regions Apple names for A3257 and A3525. Elsewhere Apple lists a nano-SIM tray on the left side. With no tray there is nothing etched to read, so use Settings, General, About or dial *#06#.
What separates a 17 Pro Max from a 17 Pro in a listing?
Size and storage. Apple lists a 6.9-inch display on the Pro Max and 6.3 inches on the Pro, and only the Pro Max comes in 2 TB. Both have three rear cameras and the same three colours.
Why do two sets of numbers appear on this page?
Our checker reaches a model in two ways. Some lookups return the Apple model number, others only name the phone. We report them side by side and never add them together, because we cannot prove they are different phones.
Can the free lookup tell if a 17 Pro Max is carrier locked?
Only for T-Mobile and Metro. Of 66 phones that returned A3257, 19 read locked, 11 unlocked and 36 unknown. Unknown is not a clean bill of health, it means the free lookup could not see a lock.