Samsung Galaxy A18 vs Samsung Galaxy A51

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Galaxy A18 compared with Galaxy A51

	SamsungGalaxy A18	SamsungGalaxy A51
Overview
Released
Released	September 2026	December 2019
Display
Screen size
Screen size	6.7″	6.5″
Resolution
Resolution	2340 × 1080	2400 × 1080 (better)
Sharpness
Sharpness	385 pixels per inch	405 pixels per inch (better)
Panel
Panel	OLED	OLED
Refresh rate
Refresh rate	90 Hz	–
Display type
Display type	Super AMOLED, FHD+, 16 million colours; 6.7-inch full rectangle, 6.5-inch accounting for rounded corners	Super AMOLED Infinity-O display; 6.3-inch viewable diagonal accounting for rounded corners
Screen protection
Screen protection	Corning Gorilla Glass 3 on the front	–
Performance
Chip
Chip	Exynos 1610	Exynos 9611
Memory
Memory	4 GB	4 GB
Storage
Storage	128 GB	128 GB
CPU
CPU	Octa-core, 2.4 GHz and 2 GHz	Octa-core, four cores at 2.3 GHz and four at 1.7 GHz; Exynos 9611 confirmed by Samsung support
Storage type
Storage type	–	Dedicated microSD slot supports cards up to 512 GB; 107 GB available on the 128 GB model
Memory
Memory	LPDDR5; RAM Plus uses internal storage as virtual memory, separate from physical RAM	–
Cameras
Main camera
Main camera	50 MP (better)	48 MP
Ultra wide camera
Ultra wide camera	5 MP	12 MP
Telephoto camera
Telephoto camera	None	None
Optical zoom
Optical zoom	None	None
Front camera
Front camera	13 MP	32 MP (better)
Main camera
Main camera	50 MP, F1.8, autofocus; Samsung UK's exact specification lists no OIS, conflicting with GSMArena's stabilisation description	48 MP, F2.0, autofocus; no optical image stabilisation
Ultra wide camera
Ultra wide camera	5 MP, F2.2	12 MP, F2.2
Front camera
Front camera	13 MP, F2.0; no autofocus or OIS	32 MP, F2.2, fixed focus
Zoom
Zoom	Digital zoom up to 10×	Digital zoom up to 8×
Video recording
Video recording	FHD (1920 × 1080) at 30 fps; slow motion at 120 fps in HD	UHD 4K 3840 × 2160 at 30 fps; HD slow motion at 240 fps
Camera features
Camera features	2 MP F2.4 macro camera; rear flash	5 MP F2.4 macro and 5 MP F2.2 depth cameras; Super Steady ultra-wide video in Full HD; rear flash
Battery and charging
Battery
Battery	5,000 mAh (better)	4,000 mAh
Video playback (maker's claim)
Video playback (maker's claim)	–	Up to 20 hours
Wired charging
Wired charging	Up to 25 W (better)	Up to 15 W
Wireless charging
Wireless charging	None	None
Battery life detail
Battery life detail	Typical 5,000 mAh, non-removable; EU energy class A, minimum battery endurance 1,200 cycles	4,000 mAh typical, 3,890 mAh rated; up to 20 hours video playback
Wired charging
Wired charging	Up to 25 W; Samsung France claims 50% charge in 30 minutes; charger sold separately	15 W fast charging
Design
Type
Type	Standard	Standard
Weight
Weight	196 g	172 g (better)
Thickness
Thickness	7.7 mm (better)	7.9 mm
Height × width
Height × width	164.4 × 77.9 mm	158.5 × 73.6 mm
Water and dust resistance
Water and dust resistance	IP64	–
Colours
Colours	Black, Silver, Light Blue (UK)	Prism Crush Black, White and Blue
Water resistance detail
Water resistance detail	IP64, dust-tight and splash-resistant; maker test sprays 10 litres of fresh water per minute from all angles for five minutes; not recommended for beach or pool use	–
Biometrics
Biometrics	Side-button fingerprint recognition sensor (exact repair guide)	In-screen fingerprint reader
Sensors
Sensors	Accelerometer, fingerprint sensor, gyro sensor, geomagnetic sensor, light sensor, virtual proximity sensing	Accelerometer, fingerprint sensor, gyroscope, geomagnetic sensor, Hall sensor, light sensor and virtual proximity sensing
Speakers
Speakers	No stereo support (Samsung UK)	Mono speaker and 3.5 mm headphone socket
Software
Operating system
Operating system	Android	Android
Software at launch
Software at launch	Android 17 with One UI 9 (Samsung France)	Android 10 with One UI 2 (TechRadar)
Safety features
Safety features	–	Samsung Knox
Software features
Software features	Knox Vault, Quick Share and Smart Switch; no Samsung DeX support	–
Release detail
Release detail	Samsung France confirmed already available on 15 September 2026; first retail day is not established, so month precision is retained. Swedish announcement says availability later in 2026.	–
Software updates
Software updates	Up to six generations of OS upgrades and six years of security updates; UK security support listed until 31 October 2032	–
AI features
AI features	Circle to Search with Google; Gemini (Samsung France)	–
Connectivity
Mobile network
Mobile network	4G LTE FDD/TDD; 3G WCDMA and 2G GSM; no 5G	4G LTE, 3G WCDMA and 2G GSM
SIM
SIM	Dual nano-SIM; UK technical table specifies SIM 1 plus hybrid second SIM/microSD slot, despite its generic FAQ calling the microSD slot dedicated	Dual nano-SIM with separate microSD slot
Wi-Fi
Wi-Fi	Wi-Fi 5 (802.11a/b/g/n/ac), 2.4 and 5 GHz, VHT80; Wi-Fi Direct	Wi-Fi 5 (802.11a/b/g/n/ac), 2.4 and 5 GHz
Bluetooth
Bluetooth	Bluetooth 5.3	Bluetooth 5.0
NFC
NFC	Yes (UK model)	Supported
USB
USB	USB Type-C, USB 2.0; audio via USB-C	USB Type-C, USB 2.0
Positioning
Positioning	GPS, Glonass, Beidou, Galileo, QZSS	GPS, GLONASS, BeiDou and Galileo