Samsung Galaxy S21 5G vs Samsung Galaxy S8+
Side-by-side specs and price comparison for buyers in Algeria.
Samsung Galaxy S21 5G
Samsung Galaxy S8+
Price coming soon
Quick Verdict
Who wins each category, side by side.
Better price
Even
Faster chip
Even
Bigger battery
Samsung Galaxy S21 5G
Faster charging
Samsung Galaxy S21 5G
Higher-resolution camera
Samsung Galaxy S21 5G
Better display
Samsung Galaxy S21 5G
Lighter body
Samsung Galaxy S21 5G
Best value for money
Even
Full specs comparison
Display
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Size (inches) | 6.2 | 6.2 |
| Panel Type | AMOLED | AMOLED |
| Resolution Height | 2400 | 2960 |
| Resolution Width | 1080 | 1440 |
| Refresh Rate | 120 | — |
| Peak Brightness | 1300 | — |
| PPI | 421 | 529 |
| Glass Type | Corning Gorilla Glass Victus | Corning Gorilla Glass 5 |
| Screen-to-body | 87.2 | 84 |
Platform
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| CPU | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China | Octa-core (4x2.3 GHz Mongoose M2 & 4x1.7 GHz Cortex-A53) - EMEAOcta-core (4x2.35 GHz Kryo & 4x1.9 GHz Kryo) - USA & China |
| GPU | Mali-G78 MP14 - InternationalAdreno 660 - USA/China | Mali-G71 MP20 - EMEAAdreno 540 - USA & China |
| Chipset Name | Exynos 2100 - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) | Exynos 8895 - EMEAQualcomm MSM8998 Snapdragon 835 (10 nm) |
| Process (nm) | 5 | 10 |
| OS Name | Android | Android |
| UI Skin | One UI 6.1 | One UI |
| OS Version | 11 | 7.0 |
Memory
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Card Slot | No | microSDXC (uses shared SIM slot) - dual SIM model only |
| Variants | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 64GB 4GB RAM, 128GB 6GB RAM |
Main Camera
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Video | 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10 + , stereo sound rec., gyro-EIS | 4K@30fps, 1080p@30/60fps, 720p@240fps, HDR, stereo sound rec., gyro-EIS, OIS |
| Features | LED flash, auto-HDR, panorama | LED flash, auto-HDR, panorama |
| Count | 3 | 1 |
| Telephoto | 64 MP, f/2, 29mm, (telephoto) | — |
| ultrawide | 12 MP, f/2.2, 13mm, (ultrawide) | — |
| Wide | 12 MP, f/1.8, 26mm, (wide) | 12 MP, f/1.7, 26mm, (wide) |
Selfie Camera
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Video | 4K@30/60fps, 1080p@30fps | 1440p@30fps |
| Features | HDR | HDR |
| Count | 1 | 2 |
| Lens | 10 MP, f/2.2, 26mm, (wide) | 2 MP |
Battery
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Capacity (mAh) | 4000 | 3500 |
| Chemistry | Li-Ion | Li-Ion |
| Wired Charging (W) | 25 | 15 |
| Wireless Charging (W) | 15 | — |
Body
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Build | Glass front (Gorilla Glass Victus), plastic back, aluminum frame | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame |
| SIM | Nano-SIM + eSIMNano-SIM + Nano-SIM + eSIM (max 2 at a time) | Nano-SIMNano-SIM + Nano-SIM |
| Height (mm) | 151.7 | 159.5 |
| Thickness (mm) | 7.9 | 8.1 |
| Weight (g) | 169 | 173 |
| Width (mm) | 71.2 | 73.4 |
Launch
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Announced | 2021, January 14 | 2017, March 29. Released 2017, April |
| Status | Available. Released 2021, January 29 | Discontinued |
Network
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| 2G Bands | GSM 850, 900, 1800, 1900 | GSM 850, 900, 1800, 1900 - SIM 1 & SIM 2 (dual-SIM model only) |
| 3G Bands | HSDPA 850, 900, 1700(AWS), 1900, 2100 | HSDPA 850, 900, 1700(AWS), 1900, 2100 |
| 4G Bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G991U1 | 1, 2, 3, 4, 5, 7, 8, 17, 20, 28 |
| 5G Bands | 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1 | — |
| Speed | HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5 + Gbps DL) | HSPA 42.2/5.76 Mbps, LTE (5CA) Cat16 1024/150 Mbps |
| Technology | GSM, CDMA, HSPA, EVDO, LTE, 5G | GSM, HSPA, LTE |
Connectivity
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Bluetooth | 5 | 5 |
| NFC | Yes | Yes |
| Positioning | GPS, GLONASS, BDS, GALILEO | GPS, GLONASS, BDS, GALILEO |
| Radio | FM radio (Snapdragon model only; market/operator dependent) | No |
| USB Type | Type-C | Type-C |
| USB Version | 3.2 | 3.1 |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 5 |
Sound
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| 3.5mm Jack | No | Yes |
| Loudspeaker | Yes, with stereo speakers | Yes |
Features
| Spec | Samsung Galaxy S21 5G | Samsung Galaxy S8+ |
|---|---|---|
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer | Iris scanner, fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2 |
Buying advice for Algeria
Both Samsung Galaxy S21 5G and Samsung Galaxy S8+ are sold in Algeria, but they fit different priorities.
Samsung Galaxy S21 5G packs a 4000 mAh battery, which translates to longer screen-on time when you are away from a charger.
Samsung Galaxy S21 5G reaches a higher main-sensor resolution at 64 MP, which helps with crops and lower-light photos.
Other popular comparisons
Samsung Galaxy S26 Ultra vs Apple iPhone 17 Pro Max
Samsung compared to Apple
Samsung Galaxy S26 Ultra vs Google Pixel 10 Pro XL
Samsung compared to Google
Samsung Galaxy S26 Ultra vs Xiaomi 15 Ultra
Samsung compared to Xiaomi
Apple iPhone 17 Pro Max vs Xiaomi 15 Ultra
Apple compared to Xiaomi
Apple iPhone 17 Pro Max vs Google Pixel 10 Pro XL
Apple compared to Google
Samsung Galaxy S26+ vs Apple iPhone 17
Samsung compared to Apple