Nothing Phone (3a) vs Xiaomi Xiaomi 15T

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Phone (3a) compared with Xiaomi 15T

	NothingPhone (3a)	XiaomiXiaomi 15T
Overview
Released
Released	March 2025	September 2025
Display
Screen size
Screen size	6.77″	6.83″
Resolution
Resolution	2392 × 1084	2772 × 1280 (better)
Sharpness
Sharpness	388 pixels per inch	447 pixels per inch (better)
Panel
Panel	OLED	OLED
Refresh rate
Refresh rate	120 Hz	120 Hz
Peak brightness
Peak brightness	3,000 nits	3,200 nits (better)
Display type
Display type	6.77-inch flexible AMOLED, FHD+	Flat AMOLED, DCI-P3, 68 billion colours and 5,000,000:1 contrast ratio
Pixel density
Pixel density	387 ppi	447 ppi
Brightness detail
Brightness detail	3,000 nits peak; 1,300 nits outdoor; 800 nits typical	3,200 nits peak covering 25% of the screen; 16,000-level automatic brightness
Always-on display
Always-on display	–	Smart AOD can activate when the user's face is detected
Screen protection
Screen protection	Panda glass	Corning Gorilla Glass 7i
Display features
Display features	120 Hz adaptive refresh; 480 Hz touch sampling (1,000 Hz in Gaming Mode); 2,160 Hz PWM dimming; 10-bit (1.07 billion colours); 1,000,000:1 contrast ratio	3,840 Hz PWM dimming, 480 Hz touch sampling and 2,560 Hz instantaneous sampling in Game Turbo; HDR10+, Dolby Vision, wet-touch support, adaptive colours and TÜV low-blue-light, flicker-free and circadian-friendly certifications
Performance
Chip
Chip	Snapdragon 7s Gen 3	MediaTek Dimensity 8400-Ultra
Memory
Memory	8 GB – 12 GB	12 GB
Storage
Storage	128 GB, 256 GB	256 GB, 512 GB (better)
CPU
CPU	8-core, up to 2.5 GHz; 4 nm TSMC process (N4)	4 nm; one Cortex-A725 up to 3.25 GHz, three Cortex-A725 up to 3 GHz and four Cortex-A725 up to 2.1 GHz
GPU
GPU	Qualcomm Adreno	Arm Mali-G720; maker gives no core-count suffix
AI engine
AI engine	–	MediaTek NPU 880
Storage type
Storage type	UFS 2.2; RAM Booster adds virtual RAM, up to 20 GB in total	LPDDR5X at 8,533 Mbps and UFS 4.1; UK 12 GB/256 GB or 12 GB/512 GB
Cooling
Cooling	4,500 mm² vapour chamber	Xiaomi 3D IceLoop system
Cameras
Main camera
Main camera	50 MP	50 MP
Ultra wide camera
Ultra wide camera	8 MP	12 MP
Telephoto camera
Telephoto camera	50 MP	50 MP
Optical zoom
Optical zoom	2×	2×
Front camera
Front camera	32 MP	32 MP
Main camera
Main camera	50 MP, ƒ/1.88, 1/1.57″ sensor, 24 mm, 84.5° field of view, OIS and EIS, autofocus	Leica Summilux, Light Fusion 800, 50 MP, f/1.7, OIS, 23 mm equivalent, 1/1.55-inch sensor and 4-in-1 binning to 2 µm pixels; 1G+6P lens
Ultra wide camera
Ultra wide camera	8 MP Sony sensor, ƒ/2.2, 1/4″ sensor, 15 mm, 120° field of view	Leica 12 MP, f/2.2, 15 mm equivalent and 120° field of view
Telephoto camera
Telephoto camera	50 MP, ƒ/2.0, 1/2.75″ sensor, 50 mm, 49.5° field of view, 2× optical zoom, EIS, autofocus	Leica 50 MP, f/1.9 and 46 mm equivalent
Front camera
Front camera	32 MP, ƒ/2.2, 1/3.44″ sensor, 22 mm, 81.2° field of view	32 MP, f/2.2 and 21 mm equivalent
Zoom
Zoom	2× optical; 4× in-sensor zoom; up to 30× Ultra Zoom	2× optical telephoto confirmed by Expert Reviews and TechRadar; maker lists 23 mm main and 46 mm telephoto and up to 60× digital zoom
Video recording
Video recording	4K video recording with AI-powered stabilisation; 4K at 30 fps and 1080p at 30, 60 or 120 fps (GSMArena)	4K at 30/60 fps, Full HD at 30/60 fps and HD at 30 fps; 10-bit log at 4K 60 fps and HDR10+ across focal lengths; slow motion HD or Full HD at 120/240/960 fps
Front video
Front video	–	4K at 30 fps, Full HD at 30/60 fps and HD at 30 fps; HDR10+, teleprompter and time-lapse selfie
Camera features
Camera features	TrueLens Engine 3.0	Leica Authentic and Vibrant styles, filters, watermark and shutter sound; ProFocus motion capture, Lightning Burst, master portraits, night mode, 50 MP main and telephoto modes, RAW/HEIF/JPEG, LUT import, ShootSteady and Ultra Night Video
Battery and charging
Battery
Battery	5,000 mAh	5,500 mAh (better)
Wired charging
Wired charging	Up to 50 W	Up to 67 W (better)
Wireless charging
Wireless charging	None	None
Battery life detail
Battery life detail	Up to two days of use (Nothing)	Xiaomi Surge Battery; maker laboratory claim of at least 80% capacity after 1,600 cycles and up to 13.19 hours continuous use
Wired charging
Wired charging	50 W; 50% in 19 minutes, 100% in 56 minutes	67 W HyperCharge; PD3.0 and PD2.0; maker laboratory full-charge time of 50 minutes; separate Xiaomi 67 W adaptor or above recommended
Wireless charging
Wireless charging	–	No wireless charging, confirmed by Expert Reviews and TechRadar
Charges other devices
Charges other devices	7.5 W reverse wired charging	–
Connectivity
Satellite messaging
Satellite messaging	No	–
Mobile network
Mobile network	5G (NSA and SA) with 4×4 MIMO; Gigabit LTE with 4×4 MIMO	5G SA/NSA, LTE, WCDMA and GSM; Xiaomi Astral Communication with Surge T1S tuner; regional Offline Communication supports voice calls up to 1.3 km in open unobstructed conditions with SIM, Xiaomi account and Bluetooth; not intended for emergency communications
SIM
SIM	Dual nano-SIM (eSIM in Japan only)	Dual nano-SIM, nano-SIM plus eSIM or dual eSIM; eSIM depends on region and carrier
Wi-Fi
Wi-Fi	Wi-Fi 6 (802.11a/b/g/n/ac/ax), 2.4 and 5 GHz	Wi-Fi 6E/6 capability depends on region and local network; 2×2 MIMO and Wi-Fi Direct
Bluetooth
Bluetooth	Bluetooth 5.4	Bluetooth 6.0
NFC
NFC	Yes, with Google Pay	Supported
USB
USB	–	USB-C; interface version not published on the UK specification page
Positioning
Positioning	GPS (L1), GLONASS (G1), BDS (B1I), Galileo (E1), QZSS (L1)	GPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou, QZSS L1/L5 and NavIC L5; assisted positioning
Design
Type
Type	Standard	Standard
Weight
Weight	208 g	194 g (better)
Thickness
Thickness	8.35 mm	7.5 mm (better)
Height × width
Height × width	163.5 × 77.5 mm	163.2 × 78 mm
Water and dust resistance
Water and dust resistance	IP64	IP68
Stylus
Stylus	No	–
Materials
Materials	Panda glass front; glass back; 100% recycled aluminium mid-frame and buttons	–
Colours
Colours	Black, White, Blue	Black, Gray and Rose Gold
Buttons
Buttons	Essential Key (press to capture to Essential Space, long press for a voice note, double tap to open it)	–
Water resistance detail
Water resistance detail	IP64	IP68; maker test in static freshwater at 3 m for 30 minutes with temperature difference no greater than 5 K; resistance can decline with wear
Biometrics
Biometrics	In-screen optical fingerprint sensor	In-screen fingerprint reader and AI Face Unlock
Sensors
Sensors	Accelerometer, electronic compass, front ambient light sensor, gyroscope, proximity sensor; linear haptic motor	Proximity, ambient light, accelerometer, gyroscope, electronic compass, IR blaster, flicker and colour-temperature sensors; X-axis linear motor
Speakers
Speakers	Dual stereo speakers	Dual speakers, Dolby Atmos, Hi-Res Audio and Hi-Res Wireless Audio
Microphones
Microphones	Two high-definition microphones	–
Software
Operating system
Operating system	Android	Android
Software at launch
Software at launch	Nothing OS 3.1 powered by Android 15	Xiaomi HyperOS 2; Android 15 confirmed by TechRadar; maker schedules HyperOS 3 OTA from the end of October 2025
Software updates
Software updates	Three years of Android updates and six years of security updates, from first availability on nothing.tech	Four Android version upgrades and six years of security updates reported by Expert Reviews and TechRadar
AI features
AI features	Essential Space (early access) with the Essential Key	Regional AI writing, speech recognition, interpreter, search, dynamic wallpapers and creativity tools; Google Gemini and Circle to Search; applicable features need internet access
In the box
In the box	Nothing Phone (3a), Nothing Cable (USB-C to USB-C), pre-applied screen protector, SIM tray ejector, safety card (no charger)	Phone, USB-C cable, SIM tool, protective case, safety information, quick-start guide, warranty card and desiccant; standard UK box excludes adaptor