What is iPhone model A1921?
Daniel Martin
Updated on February 18, 2026
The A1921 is the only unlocked iPhone XS Max for the US and is the version Apple offers as their “SIM-free†model for AppleCare replacement devices. A1921 is fully compatible with all wireless carriers in the US — working on both GSM and CDMA networks — and is the preferred model for anyone living in the states.
Also question is, what model is A1921?
Apple iPhone Xs Max Technical specifications
| Brand | Apple Apple Smartphones |
|---|---|
| Model name | iPhone Xs Max |
| Other names | A1921 |
| Standardy | GSM, UMTS, LTE, CDMA read more |
| GSM frequencies | 850 900 1800 1900 |
Additionally, are all iPhones dual band? All of the iPhones will work on bands like 1, 2, 3, 4, 5, and 7, which are the ones most carriers in the world use to establish basic LTE coverage. All of them, as far as we know right now, will make both GSM and CDMA voice calls. (I think A2097 and A2101 might not support CDMA, but I have no proof of this.)
Likewise, people ask, what model is the iPhone XS Max?
iPhone Q&A
| iPhone Model | Model No |
|---|---|
| iPhone XS (China) | A2100 |
| iPhone XS Max (US/Canada) | A1921 |
| iPhone XS Max (Global) | A2101 |
| iPhone XS Max (Japan) | A2102 |
Is iPhone XS GSM or CDMA?
A2100
| Network | Technology | GSM / CDMA / HSPA / EVDO / LTE |
|---|---|---|
| CDMA 800 / 1900 | ||
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| CDMA2000 1xEV-DO | ||
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 46, 66 - A2097 |
Related Question Answers
Will an unlocked AT&T iPhone work on Verizon?
The Verizon and Sprint variants have CDMA and GSM chips on the inside, and can be taken to any other carrier as long as the phone is unlocked. That means you can't use an AT&T or T-Mobile iPhone on Verizon or Sprint, since those versions don't have CDMA chips.What number is iPhone XR?
The iPhone XR (stylized and marketed as iPhone XÊ€; Roman numeral "X" pronounced "ten") is a smartphone designed and manufactured by Apple Inc.iPhone XR.
| iPhone XR in Blue | |
|---|---|
| Dimensions | H: 150.9 mm (5.94 in) W: 75.7 mm (2.98 in) D: 8.3 mm (0.33 in) |
| Mass | 194 g (6.8 oz) |
What is iPhone XS Max Global?
The iPhone Xs Max has a 6.5" (diagonal) widescreen OLED multi-touch, HDR, wide color (P3), True Tone display that Apple markets as "Super Retina." This display specifically has a 2688x1242 native resolution at 458 ppi, a 1,000,000:1 typical contrast ratio and 625 cd/m2 max brightness. It supports 3D Touch, as well.How do I know what model my iPhone is XR?
Go to Settings > General > About. To the right of Model, you'll see the part number. To see the model number, tap the part number.Why was the iPhone XS Max discontinued?
The discontinuation of the iPhone XS and XS Max suggest a concern that offering those devices at a lower price point—as is customary after a year—could cannibalize sales of the new iPhone 11 Pro models. Meanwhile, Apple will also still sell the iPhone 8 and iPhone 8 Plus, which debuted in 2017.Is iPhone 11 and XS Max same size?
The batteries are of a similar size, and should last a full day, but iPhone 11 has the fast new A13 Bionic processor, improving on 2018's A12 Bionic chip. But it's in camera tech where Apple have made the biggest strides.Apple.
| Name | iPhone 11 | iPhone XS Max |
|---|---|---|
| Display | 6.1-inch LCD | 6.5 inches |
How Much Is iPhone XS Max?
iPhone XS Max: $1,099/64GB, $1,249/256GB, $1,449/512GB.How many years will iPhone XS Max last?
| Version | Released | Discontinued |
|---|---|---|
| iPhone XS / XS Max | 3 years ago (21 Sep 2018) | 2 years ago (10 Sep 2019) |
| iPhone 8 / 8 Plus | 4 years ago (22 Sep 2017) | 1 year and 6 months ago (15 Apr 2020) |
| iPhone X | 4 years ago (12 Sep 2017) | 3 years ago (12 Sep 2018) |
| iPhone 7 / 7 Plus | 5 years ago (16 Sep 2016) | 2 years ago (10 Sep 2019) |
Is iPhone XS Max 5G?
Apple's iPhone XS and XS Max DON'T have 5G support - but they are much faster on 4G. Apple's newly-announced iPhone XS and XS Max might not support 5G but they do offer amazing 4G speeds thanks to new hardware. And the good news is that both of this year's XS models support up to gigabit speeds over 4G.What is the difference between the XS and XS Max?
The iPhone XS has a 5.8-inch screen, and the iPhone XS Max has a 6.5-inch display. It has about the same footprint as the iPhone 8 Plus (0.04 inches shorter, 0.2 inches narrower, 0.07 inches thicker, and 0.21 ounces heavier), but obviously fitted with a larger 6.5-inch OLED screen that stretches to the edges.What is the difference of iPhone XS and XS Max?
Both the iPhone XS and the XS Max feature the same OLED "Super Retina" display from last year's iPhone X — the same pixel density, same contrast ratio, same everything. The only difference, screen-wise, between the iPhone XS and the XS Max is the size. You're not losing out on quality.Which is better Xs or Xs Max?
The 5.8-inch iPhone XS is better optimized for one-handed use, as it's shorter and narrower than the iPhone XS Max while weighing a lighter 6.24 ounces.Against.
| iPhone XS | iPhone XS Max | |
|---|---|---|
| Processor | A12 Bionic | A12 Bionic |
| Screen | 5.8-inch OLED (2436 x 1125 pixels) | 6.5-inch OLED (2688 x 1242 pixels) |
