iPhone 17 Pro IMEI Check: A3256 and Lock Counts
The compact Pro is easy to confuse with the Pro Max. Match the A-number first, then read what 104 lookups showed.
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Compact, but not the cheap one
Apple introduced the iPhone 17 Pro in 2025. Apple's "Identify your iPhone model" page (read 10 November 2026) lists a 6.3-inch Super Retina XDR display with the Dynamic Island, a textured matte Ceramic Shield back, three rear cameras and a LiDAR Scanner, in 256 GB, 512 GB and 1 TB. The finishes are Silver, Cosmic Orange and Deep Blue.
A seller can describe a Pro Max as "the Pro" or the reverse, and the difference in price is large. Apple's list sets the check: screen size 6.3 against 6.9, and no 2 TB on the Pro.
| Detail from Apple | iPhone 17 Pro | iPhone 17 Pro Max |
|---|---|---|
| US model number | A3256 | A3257 |
| Display | 6.3-inch | 6.9-inch |
| Capacities | 256 GB, 512 GB, 1 TB | 256 GB, 512 GB, 1 TB, 2 TB |
| Colours | Silver, Cosmic Orange, Deep Blue | Silver, Cosmic Orange, Deep Blue |
What our checker saw
Counts are distinct handsets seen between 12 August and 10 November 2026. Phones whose lookup returned A3256:
| A3256 result | Devices | Share of 50 |
|---|---|---|
| Locked to a carrier we read | 13 | 26 % |
| Unknown (lock not readable for free) | 29 | 58 % |
| Unlocked or other | under 10 | - |
Phones identified by name only (no A-number) came to 54: 39 locked (72 %) and 15 unlocked (28 %), with 41 of them from the United States. None of that group read unknown, which tells you how it was read: through T-Mobile or Metro data, the two networks whose locks the free lookup can see. So do not average the two groups: read the 72 % as what T-Mobile and Metro data show for this model, and the 26 % as a floor for the wider picture.
Mostly American lookups
Of the 50 A3256 phones, 20 were checked in the United States and no other country reached ten. Unlike the Pro Max, this model has no clear cluster abroad.
If a 17 Pro is on offer
- Read Model Number under Settings, General, About: A3256 on a US phone.
- Check the display is 6.3 inches and capacity is not above 1 TB.
- Ask for a screenshot of the Carrier Lock line in the same settings page.
- Run the IMEI, then a blacklist check. For unlock timing see T-Mobile's rules.
Model numbers and specs are Apple's. Counts are ours and cover only phones checked here. Compare the regular iPhone 17.
Questions people ask
What is the model number of a US iPhone 17 Pro?
A3256 for the United States and Puerto Rico. Apple lists A3522 for Canada, Japan, Mexico, Saudi Arabia and several Gulf states, A3524 for mainland China and A3523 for other countries and regions.
How big is the 17 Pro compared with the Pro Max?
Apple lists 6.3 inches for the Pro and 6.9 inches for the Pro Max. The Pro stops at 1 TB, while the Pro Max also has 2 TB.
Is there a SIM tray to read the IMEI from?
Not on a US phone, nor in the other regions where Apple lists no tray. Elsewhere there is a nano-SIM tray on the left side. For a US phone use Settings, General, About or dial *#06#.
Why does the lock share change so much between your two counts?
One group of 50 phones returned the A-number and mostly came back unknown. Another group of 54 was identified by name only and mostly read locked. They are different lookup routes, so we show them apart.
Which colours did Apple list for the 17 Pro?
Silver, Cosmic Orange and Deep Blue, the same three as the Pro Max. Colour will not tell the two apart, size will.