Google Pixel 9a / Samsung Galaxy S24 (SM-S921B)

Google Pixel 9a: Pixel 9a; 8 GB RAM with 128 or 256 GB. The band list on this page belongs to the GTF7P model on the UK page; model codes and 5G bands can differ in other markets. The Pixel 9 and Pixel 10a are separate models.

Samsung Galaxy S24 (SM-S921B): Galaxy S24, global SM-S921B (8 GB / 128 GB, Nano-SIM + eSIM). The US SM-S921U uses a different processor; the Galaxy S24+ and S24 Ultra are separate models.

SpecificationGoogle Pixel 9aSamsung Galaxy S24 (SM-S921B)
Release year20252024
Display6.3-inch (160 mm) Actua pOLED; 1080 × 2424, 422 ppi; 60–120 Hz Smooth Display; 1,800 nits HDR, 2,700 nits peak

Smooth Display switches between 60 and 120 Hz depending on content, so scrolling is smooth and static screens save power. 2,700 nits is the peak for a small area; the full-screen HDR figure is 1,800 nits.

Google		6.2-inch (6.0-inch with rounded corners) Dynamic AMOLED 2X; 2340 × 1080 (FHD+); adaptive 1–120 Hz; Vision Booster

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

Samsung
Cover glassCorning Gorilla Glass 3

Gorilla Glass 3 is an older Corning glass generation; the Pixel 9 and 9 Pro use the newer Victus 2.

Google		—
ProcessorGoogle Tensor G4; Titan M2 security coprocessor

Titan M2 handles sensitive tasks such as passcodes, lock screen and boot verification on a chip separate from the main processor.

Google		10 cores; 3.2 GHz, 2.9 GHz, 2.6 GHz and 1.95 GHz clusters

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

Samsung
Memory and storage8 GB RAM; 128 or 256 GB

There is no microSD slot; storage is chosen at purchase.

Google		8 GB RAM; 128 GB (about 103.9 GB available)

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

Samsung
Rear cameras48 MP wide (ƒ/1.7, 1/2-inch, Quad PD, OIS + EIS); 13 MP ultrawide (ƒ/2.2, 120°); Super Res Zoom up to 8x

There is no telephoto camera; 8x zoom is done in software and optical quality is given only at 0.5x and 1x.

Google		50 MP wide (ƒ/1.8, OIS, 85°); 10 MP 3x telephoto (ƒ/2.4, 36°); 12 MP ultra-wide (ƒ/2.2, 120°)

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

Samsung
VideoRear 4K 30/60 fps; front 4K 30 fps; slow motion up to 240 fps Google8K (7680 × 4320) at 30 fps; slow motion at UHD 120 fps and FHD 240 fps Samsung
Front camera13 MP (ƒ/2.2, 96.1°) Google12 MP, ƒ/2.2, 80° Samsung
Battery and charging5,100 mAh (typical), 5,000 mAh minimum; fast wired charging; Qi-certified wireless charging

No charger is included, only a USB-C cable (USB 2.0).

Google		4000 mAh typical (3880 mAh rated); about 50% in 30 minutes with a 25 W adapter and 3 A cable; Fast Wireless Charging 2.0; Wireless PowerShare

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

Samsung
DurabilityIP68; matte composite back, satin metal frame

IP68 describes dust-tightness and water resistance under defined conditions; liquid damage is usually not covered by warranty.

Google		IP68 (up to 1.5 m of fresh water for up to 30 minutes) Samsung
SoftwareLaunched with Android 15; seven years of OS, security and Pixel Drop updates Google—
Connectivity5G Sub-6; Wi-Fi 6E (2x2 MIMO); Bluetooth 5.3; NFC; GPS, GLONASS, Galileo, BeiDou, QZSS; USB-C 3.2

This model has no mmWave 5G; Sub-6 bands can differ between regional model codes.

Google		5G; Wi-Fi 6E (2.4 + 5 + 6 GHz); Bluetooth 5.3; NFC; USB Type-C (USB 3.2 Gen 1)

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

Samsung
SIMNano SIM + eSIM (dual SIM) Google—
UnlockingUnder-display fingerprint and face unlock Google—
AudioStereo speakers; two microphones Google—
Size and weight154.7 × 73.3 × 8.9 mm; 186 g Google147.0 × 70.6 × 7.6 mm; 167 g Samsung
ColoursObsidian, Porcelain, Iris, Peony GoogleOnyx Black, Marble Grey, Cobalt Violet, Amber Yellow; extra online colours Samsung
Model code—SM-S921B/DS; Nano-SIM + eSIM or dual eSIM Samsung
Rated battery life—Up to 29 hours of video playback; rated for at least 2000 charge cycles; energy efficiency class A

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

Samsung
Location and sensors—GPS, GLONASS, BeiDou, Galileo, QZSS; accelerometer, barometer, fingerprint, gyro, geomagnetic, Hall, light and proximity sensors Samsung
Operating system—Shipped with Android 14 and One UI 6.1; seven generations of OS upgrades and seven years of security updates

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

Samsung