Apple iPhone 17 Pro / Samsung Galaxy S24 (SM-S921B)

ProMotion raises the refresh rate to 120 Hz for scrolling and games and lowers it for static content to save power, which lets the Always-On lock screen stay lit at a very low rate. Measured as a standard rectangle the diagonal is 6.27 inches.

The adaptive refresh rate drops to 1 Hz on static content to save power; Vision Booster adjusts tone and contrast in bright light.

3,000 nits is a short peak reached in sunlight under auto-brightness, not sustained full-screen brightness. The 1-nit floor helps reading in the dark without glare.

Apple says Ceramic Shield 2 resists scratches 3x better than the previous generation, and the back resists cracks 4x better than the previous back glass. The anti-reflective coating is meant to keep the screen readable in bright light.

The vapor chamber spreads A19 Pro heat into the chassis; Apple claims up to 40% better sustained performance than the previous generation. Aluminium conducts heat better than the titanium frame of earlier Pro models.

Neural Accelerators in the GPU cores speed up on-device AI work; hardware ray tracing computes realistic lighting and reflections in games.

Usable space is lower than the label because the OS and apps take room. There is no memory card slot.

The 2× view is not a separate lens; it uses the centre of the 48MP sensor for a 12MP image. Default photos are 24MP.

Macro shots use the Ultra Wide camera; the phone can switch automatically when you get close to a subject.

8× (200 mm) is a crop from the centre of the 4× telephoto sensor, which Apple calls optical-quality zoom. The telephoto sensor is 56% larger than the previous generation's.

4K 120 fps ProRes records only to external storage over USB-C. Apple Log 2 and ProRes RAW leave room for colour grading; Genlock keeps several cameras in sync.

The square sensor allows landscape group selfies while holding the phone upright; Dual Capture records front and rear cameras at once, up to 4K 30 fps.

These figures are for the nano-SIM + eSIM model (A3523/A3526). Apple says eSIM-only models last longer because they fit a bigger battery.

Fast charging needs a high-wattage USB Power Delivery adapter; a 20 W adapter charges more slowly.

25 W needs the new MagSafe Charger or a Qi2 25 W-capable charger; older Qi chargers run at lower power.

10 Gb/s needs a USB 3 cable; the cable in the box is a charging cable. Video can go to a monitor or TV over a suitable USB-C cable.

Thread builds a low-power mesh with smart-home devices; Ultra Wideband finds AirTags and compatible devices with direction and distance. Wi-Fi 7 needs a compatible router.

This model has a physical SIM tray; models sold in some countries are eSIM-only. eSIM needs carrier support.

Dual-frequency GPS reduces location drift among tall buildings. Satellite features vary by country; Apple offers them free for two years after activation.

Testing is done in lab conditions; resistance may decline over time and liquid damage is not covered by warranty.

Camera Control is a touch-sensitive side button that opens the camera and lets you slide to adjust zoom and exposure. LiDAR helps autofocus in the dark and portrait depth.

Outside this range the phone may pause charging or dim the display.

Samsung’s UK page lists security updates for this model until 31 January 2031; timing can vary by market.

Samsung notes that the processor varies by market; the US SM-S921U does not use the same chip as this global model.

The series also has 256 and 512 GB and 12 GB RAM configurations; there is no microSD slot.

3x optical zoom uses the separate telephoto lens; the 2x option crops the main sensor at optical quality, and digital zoom reaches 30x.

Wireless PowerShare lets the back of the phone wirelessly charge small devices such as a watch or earbud case. No adapter is included.

The 2000-cycle figure comes from the EU label, which targets the battery keeping a set share of its capacity over that span.

The 6 GHz band needs a Wi-Fi 6E router.