The Samsung Galaxy M21 is a budget-friendly yet functional smartphone that strikes a good balance between power, efficiency, and strength. It is packed with a super AMOLED screen, a large battery, and a reliable Exynos processor and is designed for users who prefer screen quality and battery life without increasing their budget.
| Feature | Specification |
| Display | 6.4-inch Full HD Super AMOLED |
| Processor | Exynos 9611 (10nm) |
| RAM & Storage | 4GB/6GB RAM, 64GB/128GB internal storage |
| Rear Camera | Triple – 48MP (main) + 8MP (ultrawide) + 5MP (depth) |
| Front Camera | 20MP |
| Battery | 6000mAh with 15W fast charging |
| OS | Android 10, upgradable to Android 13 (One UI) |
| Build | Polycarbonate back, Gorilla Glass 3 front |
Display Excellence: Immersive Visuals with Super AMOLED
The Galaxy M21 has a 6.4 -inch super amoled panel with a resolution of 1080 x 2340 pixels, providing a great viewing experience with deep black and lively colors. 19.5: 9 Aspect conditions increase media consumption, while 420 nits (specific) desire ensures clarity in light daylight.
Key Display Attributes
- Screen-to-body ratio: 84.2%
- Pixel density: 403 ppi
- Protection: Corning Gorilla Glass 3
- Always-on Display: Supported
Performance Engine: Exynos 9611 SoC Analysis
Under the hood runs the Galaxy M21 Exynos on the 9611 chipset, built on the 10NM process, and provides a power-capable and balanced performance. With an Octa-Core CPU and Mali-G72 MP3 GPU, the device basically handles multitasking, medium play and everyday use.
CPU Configuration
- 4×2.3 GHz Cortex-A73
- 4×1.7 GHz Cortex-A53
Combined with 4GB or 6GB of LPDDR4x RAM, the M21 performs smoothly with One UI’s optimized Android interface.
Storage Variants & Expandability
The Galaxy M21 is available in 64GB and 128GB UFS 2.1 storage options. Storage is expandable via microSD card up to 512GB, utilizing a dedicated microSD slot, giving users complete flexibility to store apps, media, and files.
Battery Brilliance: Unmatched Endurance with 6000mAh
One of the standout features of the Galaxy M21 is its 6000mAh battery, capable of providing two full days of usage under normal conditions. The 15W fast charging ensures the phone is ready to go in just over 2 hours of charging time.
Battery Life Metrics
| Activity | Duration (Approx.) |
| Video Playback | Up to 29 hours |
| Internet Browsing | Up to 17 hours |
| Talk Time (4G VoLTE) | Up to 49 hours |
| Audio Playback | Up to 131 hours |
Camera Capabilities: Triple Lens Versatility
The M21 sports a triple rear camera setup that supports versatile photography modes. Its 48MP primary sensor captures detailed daylight shots, while the 8MP ultra-wide lens provides a 123° field of view. The 5MP depth sensor adds natural bokeh effects to portraits.
Camera Features
- Live Focus
- Night Mode
- Scene Optimizer
- 4K Video Recording at 30fps
- Super Slow-mo, Hyperlapse
Front Camera Performance
The 20MP front-facing camera is optimized for selfies with AI beauty mode and supports 1080p video recording, making it ideal for video calls and social media content creation.
Software Experience: One UI on Android
Out of the box, the M21 ships with Android 10 with One UI 2.0, and is upgradeable to Android 13. Samsung’s One UI offers a clean, bloatware-free, and user-friendly interface, tailored for one-handed usage and efficient navigation.
Key Software Features
- Dark Mode
- Digital Wellbeing
- Secure Folder
- Samsung Knox Security
- Edge Panels
Connectivity Suite
The Galaxy M21 supports a dual nano-SIM configuration with dual VoLTE capability. It includes Wi-Fi 802.11ac, Bluetooth 5.0, USB Type-C, and GPS with GLONASS support. The inclusion of a 3.5mm headphone jack and FM Radio further enhances its usability.
Design and Build: Sturdy Yet Lightweight
While made of polycarbonate, the Galaxy M21’s back panel has a glossy gradient finish and is available in Raven Black, Midnight Blue, and Iceberg Blue. Despite housing a large battery, the phone weighs only 188g, making it ergonomic and pocket-friendly.
Biometrics & Sensors
The Galaxy M21 features a rear-mounted fingerprint scanner and AI-powered face unlock. Other sensors include:
- Accelerometer
- Gyroscope
- Proximity Sensor
- Compass
- Light Sensor
Pros and Cons
✅ Pros
- Super AMOLED Full HD+ Display
- 6000mAh Battery with Excellent Backup
- Versatile Triple Camera Setup
- Expandable Storage
- Clean UI with Long-Term Updates
❌ Cons
- No NFC support
- Plastic build (less premium feel)
- Only 15W fast charging
Ideal Use Cases
- Media Consumption: Thanks to its AMOLED display and long battery life
- Photography Enthusiasts: Decent camera system for the price
- Students & Professionals: Reliable daily driver with productivity features
- Travelers: All-day battery and expandable storage
Samsung M21 vs Redmi Note 9 Pro: Which Is Best?
When comparing the Samsung Galaxy M21 vs Redmi Note 9 Pro, both phones cater to budget-conscious users but differ in strengths.
| Feature | Samsung Galaxy M21 | Redmi Note 9 Pro |
| Display | 6.4″ Super AMOLED | 6.67″ IPS LCD |
| Processor | Exynos 9611 | Snapdragon 720G |
| Battery | 6000mAh | 5020mAh |
| Main Camera | 48MP Triple | 48MP Quad |
| Front Camera | 20MP | 16MP |
| Charging | 15W | 18W |
| OS | Android 10 → 13 | Android 10 → 12 |
| Build | Plastic back | Glass back (Gorilla Glass 5) |
How to Set Alarm in Samsung M21
Setting an alarm on your Galaxy M21 is simple:
- Open the Clock app from your app drawer.
- Tap the Alarm tab at the bottom.
- Tap the “+” icon to create a new alarm.
- Set the time, choose days, assign a label, and select a sound.
- Tap Save.
Your alarm will now be active and visible in the list.
How to Change Time in Samsung M21
To manually change the time on Samsung M21:
- Open Settings.
- Tap General Management.
- Select Date and Time.
- Turn off Automatic date and time.
- Tap Set time to manually change the current time.
- Tap Set date to modify the date.
How to Switch Off Samsung M21
To turn off your Samsung Galaxy M21:
Method 1: Hardware Buttons
- Press and hold the Power + Volume Down buttons simultaneously.
- Tap Power Off on the screen.
- Confirm by tapping Power Off again.
Method 2: Notification Panel
- Swipe down from the top to open the Quick Panel.
- Tap the Power icon in the top-right corner.
- Choose Power Off and confirm.
How to Take Screenshot for Samsung M21
You can take a screenshot on your Galaxy M21 using several methods:
Method 1: Button Combination
- Press the Power + Volume Down buttons at the same time.
- The screen will flash, and a screenshot will be saved in the Gallery > Screenshots folder.
Method 2: Palm Swipe Gesture
- Go to Settings > Advanced Features > Motions and Gestures.
- Enable Palm swipe to capture.
- Swipe the edge of your palm across the screen (left to right or vice versa).
Method 3: Assistant Menu
- Enable Assistant Menu in Settings > Accessibility > Interaction and dexterity.
- Tap the floating Assistant Menu, then select Screenshot.
Why Samsung M21 is Still a Smart Buy
- Super AMOLED Display: Offers deeper contrast and superior color reproduction.
- Long-Lasting Battery: 6000mAh ensures up to two days of moderate use.
- One UI Experience: Clean and consistent software updates.
- Expandable Storage: microSD support up to 512GB.
- Reliable Camera: Quality daytime shots and excellent selfies.
Samsung Galaxy M21 Price In Bangladesh
Variant : 4GB+64GB=16999
6GB+128GB=18999
Final Verdict
The Samsung Galaxy M21 is a value-for-money smartphone that brings flagship-grade display quality and exceptional battery life into the budget segment. It is an excellent choice for users seeking a reliable smartphone for multimedia, photography, and long-lasting performance without breaking the bank.
With consistent software updates, dependable performance, and an immersive display, the M21 remains one of the top contenders in its price segment.