Detailed comparison and review of OPPO Reno Z and Samsung Galaxy A21s. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
| DESIGN AND DIMENSIONS | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1979 | SM-A217F/DSN | |
| Form Factor | Touch | Touch | |
| Height | 157.3 mm | 163.7 mm | Samsung Galaxy A21s has greater height than OPPO Reno Z. |
| Width | 74.9 mm | 75.3 mm | Samsung Galaxy A21s has greater width than OPPO Reno Z. |
| Depth | 9.1 mm | 8.9 mm | Samsung Galaxy A21s is narrower than OPPO Reno Z. |
| Weight | 186 g | 192 g | OPPO Reno Z is lighter than OPPO Reno Z. |
| Body Colour | Jet black | Aurora purple | White | Blue | Black | |
| Body Material | 3D glass | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.932 W/kg (head), 3.99 W/kg (limb), 1.175 W/kg (body) | 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) | |
| Connector Type | USB Type-C Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Display Type | OLED display | LCD display | |
|---|---|---|---|
| Display Technology | AMOLED | PLS TFT | |
| Screen Size (Display Size) | 6.4" | 6.5" | Samsung Galaxy A21s has larger screen size than OPPO Reno Z. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | OPPO Reno Z has better screen resolution than Samsung Galaxy A21s. |
| Display Format | - | HD+ | |
| Pixel Density | 402 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Display Enhancement Technology | OnCell technology | - | |
| Display Features | - | Infinity O display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
| PROCESSOR | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Processor Type (CPU) | MediaTek Helio P90 | - | |
|---|---|---|---|
| Clock Speed | - | 2 GHz | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | OPPO Reno Z has 64-bit architecture. |
| Graphics System (GPU) | 9XM-HP8 | - |
| MEMORY | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| RAM | 4 GB | 3 GB | OPPO Reno Z has more RAM than Samsung Galaxy A21s. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 32 GB | OPPO Reno Z has more internal memory than Samsung Galaxy A21s. |
| User Memory | - | 19.5 GB | |
| Supported Flash Memory Cards (Expandable Memory) | - | microSDHC, microSDXC - up to 512 GB |
| CAMERA | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 48 Megapixel | Both phones have the same camera resolution. |
| Sensor Size | 1/2" | - | |
| Sensor Name | Sony Exmor RS IMX586 sensor | - | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.7 | F/2.0 | OPPO Reno Z has better lens aperture than OPPO Reno Z. |
| Field of View (FoV) | - | 80 degree(s) | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 8x | |
| Special Effects | HDR | - | |
| Camera Modes | Time-lapse mode, Slow motion mode, Expert Mode, Backlit, Portrait, Pano mode, Dazzle Colour Mode, Ultra Night Mode 2.0 | Live Focus mode | |
| Light Source | LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, 1280 x 720 (720p) at 60 fps | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Noise reduction, EIS video stabilisation, 4-in-1 resolution focus technology | Live Focus |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 5 Megapixel | 8 Megapixel | Samsung Galaxy A21s has better second camera resolution than OPPO Reno Z. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.4 | F/2.2 | Samsung Galaxy A21s has better second camera lens aperture than OPPO Reno Z. |
| Field of View (2nd Camera) | - | 123 degree(s) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | 4cm macro photography |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Camera Functions (4th Camera) | - | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 32 Megapixel | 13 Megapixel | OPPO Reno Z has better front camera resolution than Samsung Galaxy A21s. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | OPPO Reno Z has better front lens aperture than OPPO Reno Z. |
| Focus Adjustment | - | Focus free |
| BATTERY AND CHARGING | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Battery Capacity (Battery Size) | 4035 mAh | 5000 mAh | Samsung Galaxy A21s has larger battery capacity than OPPO Reno Z. |
|---|---|---|---|
| Fast Charging Technology | VOOC Flash Charge technology 3.0 | - | OPPO Reno Z has fast charging technology. |
| Talk Time | - | 3240 minutes | |
| Run Time Details | - | Active online usage (4G): up to 23 hrs Active online usage (Wi-Fi): up to 23 hrs Playback (video): up to 21 hrs Playback (audio): up to 109 hrs Talk (4G): up to 3240 min |
|
| Battery Technology | - | Lithium Ion |
| CELLULAR | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | ColorOS 6 (based on Android 9) | - | |
| User Interface | - | One UI | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 | Band 1, Band 2, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 800, 900, 800 | 2100, 1900, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 18, Band 19, Band 20, Band 26, Band 28, Band 38, Band 39, Band 40, Band 41 | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 1900, TDD 2300, TDD 2500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | Wi-Fi | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 LE | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Supported Digital Audio Standards | - | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | Dolby Atmos Surround Sound | Dolby Atmos sound technology |
| FEATURES | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, gyro sensor, geomagnetic sensor | Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor | |
| Security Devices | Fingerprint reader (under display) | Face recognition, fingerprint reader | |
| Additional Phone Features | Protective O-Dot, Game Boost 2.0 | Samsung KNOX, Virtual Light Sensing |
| OTHERS | OPPO Reno Z | Samsung Galaxy A21s |
|---|
| Included Accessories | Headphones, power adapter, SIM card removal tool, cover, USB-C cable | Power adapter | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | - |
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