Samsung Galaxy M15 vs Samsung Galaxy S21 5G
Side-by-side specs and price comparison for buyers in Algeria.
Samsung Galaxy M15
Samsung Galaxy S21 5G
Quick Verdict
Who wins each category, side by side.
Better price
Samsung Galaxy M15
Faster chip
Even
Bigger battery
Samsung Galaxy M15
Faster charging
Even
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 M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Size (inches) | 6.5 | 6.2 |
| Panel Type | AMOLED | AMOLED |
| Resolution Height | 2340 | 2400 |
| Resolution Width | 1080 | 1080 |
| Refresh Rate | 90 | 120 |
| Peak Brightness | 800 | 1300 |
| PPI | 396 | 421 |
| Glass Type | — | Corning Gorilla Glass Victus |
| Screen-to-body | 84.3 | 87.2 |
Platform
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| CPU | Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | 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 |
| GPU | Mali-G57 MC2 | Mali-G78 MP14 - InternationalAdreno 660 - USA/China |
| Chipset Name | Mediatek Dimensity 6100 + | Exynos 2100 - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) |
| Process (nm) | 6 | 5 |
| OS Name | Android | Android |
| UI Skin | One UI 6 | One UI 6.1 |
| OS Version | 14 | 11 |
Memory
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Card Slot | microSDXC (uses shared SIM slot) | No |
| Variants | 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM |
Main Camera
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Video | 1080p@30fps, gyro-EIS | 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10 + , stereo sound rec., gyro-EIS |
| Features | LED flash, panorama, HDR | LED flash, auto-HDR, panorama |
| Count | 3 | 3 |
| Macro | 2 MP, f/2.4, (macro) | — |
| Telephoto | — | 64 MP, f/2, 29mm, (telephoto) |
| ultrawide | 5 MP, f/2.2, (ultrawide) | 12 MP, f/2.2, 13mm, (ultrawide) |
| Wide | 50 MP, f/1.8, (wide) | 12 MP, f/1.8, 26mm, (wide) |
Selfie Camera
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Video | 1080p@30fps | 4K@30/60fps, 1080p@30fps |
| Features | — | HDR |
| Count | 1 | 1 |
| Lens | 13 MP, f/2, (wide) | 10 MP, f/2.2, 26mm, (wide) |
Battery
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Capacity (mAh) | 6000 | 4000 |
| Chemistry | — | Li-Ion |
| Wired Charging (W) | 25 | 25 |
| Wireless Charging (W) | — | 15 |
Body
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Build | Glass front, plastic back, plastic frame | Glass front (Gorilla Glass Victus), plastic back, aluminum frame |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + eSIMNano-SIM + Nano-SIM + eSIM (max 2 at a time) |
| Height (mm) | 160.1 | 151.7 |
| Thickness (mm) | 9.3 | 7.9 |
| Weight (g) | 217 | 169 |
| Width (mm) | 76.8 | 71.2 |
Launch
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Announced | 2024, March 09 | 2021, January 14 |
| Status | Available. Released 2024, April 05 | Available. Released 2021, January 29 |
Network
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| 2G Bands | GSM 850, 900, 1800, 1900 | GSM 850, 900, 1800, 1900 |
| 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, 17, 20, 26, 28, 38, 40, 41, 66 | 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 |
| 5G Bands | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 | 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1 |
| Speed | HSPA, LTE, 5G | HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5 + Gbps DL) |
| Technology | GSM, HSPA, LTE, 5G | GSM, CDMA, HSPA, EVDO, LTE, 5G |
Connectivity
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Bluetooth | 5.3 | 5 |
| NFC | Yes (market/region dependent) | Yes |
| Positioning | GPS, GALILEO, GLONASS, BDS, QZSS | GPS, GLONASS, BDS, GALILEO |
| Radio | No | FM radio (Snapdragon model only; market/operator dependent) |
| USB Type | Type-C | Type-C |
| USB Version | 2.0 | 3.2 |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6 |
Sound
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| 3.5mm Jack | Yes | No |
| Loudspeaker | Yes | Yes, with stereo speakers |
Features
| Spec | Samsung Galaxy M15 | Samsung Galaxy S21 5G |
|---|---|---|
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, compass | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
Buying advice for Algeria
Both Samsung Galaxy M15 and Samsung Galaxy S21 5G are sold in Algeria, but they fit different priorities.
Both phones sit in the same price band, so the choice comes down to specs and brand preference.
Samsung Galaxy M15 packs a 6000 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.
In the 30,000 to 60,000 DZD bracket, look for 5,000 mAh batteries, 120Hz screens, and at least 6 GB of RAM.
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