Design and Build

The Samsung Galaxy A51 has a plastic body which is 7.9mm thick and weighs 172g. It's available in Prism Crush Black, White, Blue, and Pink with a 6.5-inch display. There’s no water/dust protection. The profile of the gadget has been described as “thin”, “lissome” and other like adjectives by the users while some have observed that it’s “less premium”, “humbler”, less “elite” than the Galaxy S20.

• Plastic chassis, 7.9mm thick
• 172g weight
• No water/dust resistance
• In-display fingerprint sensor
• No glass back

Galaxy A51 Display

With a 2400 x 1080 resolution at 405 PPI and 800 nits brightness, the Galaxy A51 carries on a 6.5-inch Super AMOLED display. It is also fitted with a sheet of Gorilla Glass 3 for protection. The screen has vibrant colors that are very pleasing to the eye, but it’s not a great experience with the 60Hz refresh rate as opposed to the Galaxy A52.

• Super AMOLED, 2400 x 1080, 405 PPI
• 800 nits brightness
• 60Hz refresh rate
• Gorilla Glass 3
• No HDR

Performance and Software

The Galaxy A51 is equipped with an Exynos 9611 (octa-core, 2.3GHz, 10nm), 4GB/6GB/8GB RAM, and 64GB/128GB storage. Being originally shipped in the Android 10 version, it can be also updated to One UI 2.0, and it is also able to be further updated to Android 13. Samsung Pay and the Knox security service are included as well. This phone is great for everyday tasks without any issues about the performance, while the phone is also described as slower than the Galaxy S20 by some users.

• Exynos 9611, octa-core
• 4GB/6GB/8GB RAM
• Android 10 (up to Android 13)
• Samsung Pay, Knox
• No flagship performance

The Exynos 9611 handles casual use well but struggles with heavy gaming.

Cameras

The Galaxy A51 features a quad-camera system: 48MP main (f/2.0), 12MP ultrawide (f/2.2), 5MP macro (f/2.4), and 5MP depth (f/2.2), with a 32MP front camera (f/2.2). It supports 4K video at 30fps. Users praise its daylight performance but note weaker low-light shots than the Galaxy S20.

• 48MP main, 12MP ultrawide
• 5MP macro, 5MP depth
• 32MP front
• 4K video at 30fps
• No telephoto

Battery and Charging

The Galaxy A51 has a 4000mAh battery, offering up to 15 hours of video playback. It supports 15W fast charging (0–100% in ~90min) via USB-C. Real-world use yields 1–1.5 days. Users appreciate its battery life but note slower charging than the Galaxy A71.

• 4000mAh battery
• Up to 15h video playback
• 15W charging, 0–100% in ~90min
• 1–1.5 days real-world
• No wireless charging

Connectivity

The Galaxy A51 supports Wi-Fi 5 (802.11ac), Bluetooth 5.0, 4G, NFC, and GPS (A-GPS, GLONASS, Galileo, BDS). It includes a 3.5mm headphone jack and USB-C 2.0. Users praise its connectivity but note no 5G support compared to the Galaxy A52 5G.

• Wi-Fi 5, Bluetooth 5.0
• 4G, NFC
• GPS, 3.5mm jack
• USB-C 2.0
• No 5G