Samsung Galaxy A42 5G vs Samsung Galaxy A51 5G
A spec-by-spec comparison of the Samsung Galaxy A42 5G and the Samsung Galaxy A51 5G, taken from their full specification sheets. Green marks the better value in each measured row.
Head to head
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Price | $90 | $99 |
| Our rating | 7/10 | 7/10 |
| Battery | 5,000 mAh | 4,500 mAh |
| Wired charging | 15W | 15W |
| RAM (max) | — | 8 GB |
| Storage (max) | 128 GB | 128 GB |
| Screen size | 6.6 in | 6.5 in |
| Main camera | 48 MP | 48 MP |
| Weight (lower is lighter) | 193 g | 187 g |
| Released | Nov 2020 | Apr 2020 |
Summary: Samsung Galaxy A42 5G is ahead on battery, screen size. Samsung Galaxy A51 5G is ahead on weight (lower is lighter).
★ Which should you buy? Samsung Galaxy A42 5G is the stronger overall pick on the measured specs.
Reviewed by the infozme.com Editorial Team — see how we research & rate phones.
Display
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Type | Super AMOLED, Infinity-U Display | Super AMOLED |
| Size | 6.6 inches, 105.2 cm2 (~84.3% screen-to-body ratio) | 6.5 inches |
| Resolution | 720 x 1600 pixels, 20:9 ratio (~266 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) |
| Features | In-display optical fingerprint scanner | — |
| Protection | — | Corning Gorilla Glass 3 |
Platform
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Chipset | Qualcomm SM7225 Snapdragon 750G 5G (8 nm) | Exynos 980 (8 nm) (Note: Some carrier variants, like Verizon, used Snapdragon 765G) |
| CPU | Octa-core (2x2.2 GHz Kryo 570 & 6x1.8 GHz Kryo 570) | Octa-core (2x2.2 GHz Cortex-A77 & 6x1.8 GHz Cortex-A55) |
| GPU | Adreno 619 | Mali-G76 MP5 |
| OS | Android 10, upgradable to Android 13, One UI 5 | Android 10, upgradable to Android 13, One UI 5 |
Memory
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| RAM | 4GB, 6GB, 8GB | — |
| Internal Storage | 128GB UFS 2.1 | — |
| Card Slot | microSDXC (uses shared SIM slot), up to 1TB | — |
| Card slot | — | microSDXC (dedicated slot) |
| Internal | — | 128GB 6GB RAM, 128GB 8GB RAM |
Main Camera
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Quad | 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF; 8 MP, f/2.2, 123˚ (ultrawide); 5 MP, f/2.4, (macro); 5 MP, f/2.4, (depth) | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF; 12 MP, f/2.2, 123˚ (ultrawide); 5 MP, f/2.4, (macro); 5 MP, f/2.2, (depth) |
| Features | LED flash, panorama, HDR, Scene Optimizer, Flaw Detection | LED flash, panorama, HDR |
| Video | 4K@30fps, 1080p@30fps | 4K@30fps, 1080p@30fps |
Selfie Camera
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Single | 20 MP, f/2.2, (wide) | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm |
| Features | Selfie Focus, Smart Beauty, AR Emoji, AR stickers | HDR |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps |
Battery
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Type | Li-Po 5000 mAh, non-removable | Li-Po 4500 mAh, non-removable |
| Charging | 15W wired fast charging | 15W wired |
Body
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Dimensions | 164.4 x 75.9 x 8.6 mm (6.47 x 2.99 x 0.34 in) | 158.9 x 73.6 x 8.7 mm (6.26 x 2.90 x 0.34 in) |
| Weight | 193 g (6.81 oz) | 187 g (6.60 oz) |
| Build | Glass front, plastic back, plastic frame | Glass front (Gorilla Glass 3), plastic back, plastic frame |
| Colors | Prism Dot Black, Prism Dot White, Prism Dot Gray | — |
| SIM | — | Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) |
Comms
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE |
| Positioning | GPS, GLONASS, GALILEO, BDS | GPS, GLONASS, GALILEO, BDS |
| NFC | Yes | Yes (market/region dependent) |
| USB | USB Type-C 2.0, USB On-The-Go | USB Type-C 2.0, OTG |
| Radio | — | FM Radio |
Launch
| Samsung Galaxy A42 5G | Samsung Galaxy A51 5G |
|---|
| Announced | September 2, 2020 | 2020, April 8 |
| Status | Available. Released November 11, 2020 | Released 2020, April 29 |
| OS at Launch | Android 10, One UI 2.5 | — |
Frequently asked questions
Which has the better battery, Samsung Galaxy A42 5G or Samsung Galaxy A51 5G?
Samsung Galaxy A42 5G — 5,000 mAh for the Samsung Galaxy A42 5G versus 4,500 mAh for the Samsung Galaxy A51 5G.
Which is lighter, Samsung Galaxy A42 5G or Samsung Galaxy A51 5G?
Samsung Galaxy A51 5G — 193 g for the Samsung Galaxy A42 5G versus 187 g for the Samsung Galaxy A51 5G.
Which is newer, Samsung Galaxy A42 5G or Samsung Galaxy A51 5G?
Samsung Galaxy A42 5G — Nov 2020 for the Samsung Galaxy A42 5G versus Apr 2020 for the Samsung Galaxy A51 5G.
Is the Samsung Galaxy A42 5G or the Samsung Galaxy A51 5G rated higher?
We rate the Samsung Galaxy A42 5G 7/10 and the Samsung Galaxy A51 5G 7/10.
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