In depth comparison and review of ASUS Zenfone 8 Flip and Nokia XR21. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZS672KS | TA-1486 | |
| Form Factor | Touch | Touch - Rugged | |
| Height | 165.04 mm | 168 mm | Nokia XR21 has greater height than ASUS Zenfone 8 Flip. |
| Width | 77.28 mm | 78.58 mm | Nokia XR21 has greater width than ASUS Zenfone 8 Flip. |
| Depth | 9.6 mm | 10.45 mm | ASUS Zenfone 8 Flip is narrower than ASUS Zenfone 8 Flip. |
| Weight | 230 g | 231 g | ASUS Zenfone 8 Flip is lighter than ASUS Zenfone 8 Flip. |
| Body Colour | Galactic black | Midnight black | Pine green | |
| Body Material | Glass | Polycarbonate, thermoplastic polyurethane (TPU) | |
| Protection | - | Dustproof, drop-proof, water-resistant | |
| Waterproof (Water-resistant) | - | Yes | Nokia XR21 is waterproof. |
| IP rating | - | IP68, IP69K, IP69 | |
| SAR Value | 1.43 W/kg (head), 1.245 W/kg (body), 3.504 W/kg (limb) | 1.16 W/kg (body), 1.1 W/kg (head) | |
| Integrated Components | - | LED flashlight | |
| Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Display Type | OLED display | - | |
|---|---|---|---|
| Display Technology | AMOLED | - | |
| Screen Size (Display Size) | 6.67" | 6.49" | ASUS Zenfone 8 Flip has larger screen size than Nokia XR21. |
| Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 2400 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | Full HD+ | Full HD+ | |
| Aspect Ratio | 20:9 | 20:9 | |
| Max Brightness | 1000 cd/m² | 550 cd/m² | ASUS Zenfone 8 Flip has better display brightness than Nokia XR21. |
| HDR | Yes | - | ASUS Zenfone 8 Flip has HDR. |
| HDR Technology | HDR10+ | - | |
| Display Enhancement Technology | DC Dimming | - | |
| Display Refresh Rate | 90 Hz | 120 Hz | Nokia XR21 has better refresh rate than ASUS Zenfone 8 Flip. |
| Display Features | ASUS Glove Touch technology, Delta-E < 1, NanoEdge display, 105% NTSC, 110% DCI-P3 | Glove & Wet Touch, 82% NTSC | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 6 (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 888 5G | Qualcomm Snapdragon 695 5G | |
|---|---|---|---|
| Processor Number | SM8350 | SM6375 | |
| Clock Speed | 2.84 GHz | 2.2 GHz | ASUS Zenfone 8 Flip has higher clock speed than Nokia XR21. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Qualcomm ADRENO 660 | Qualcomm ADRENO 619 |
| MEMORY | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| RAM | LPDDR5 SDRAM - 8 GB | 6 GB | ASUS Zenfone 8 Flip has more RAM than Nokia XR21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 256 GB | 128 GB | ASUS Zenfone 8 Flip has more internal memory than Nokia XR21. |
| Memory Interface | UFS 3.1 | - | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSD, microSDXC - up to 2 TB | - |
| CAMERA | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 2 | |
|---|---|---|---|
| Rear Camera Design | Flip | - | |
| Sensor Resolution | 64 Megapixel | 64 Megapixel | Both phones have the same camera resolution. |
| Sensor Size | 1/1.7" | - | |
| Sensor Name | Sony Exmor RS IMX686 sensor | - | |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/1.8 | - | |
| Field of View (FoV) | 78.3 degree(s) | - | |
| Pixel Size | 0.8 μm | - | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | ASUS Zenfone 8 Flip has optical stabilisation. |
| Focus Adjustment | - | Automatic | |
| Minimum Focal Length (Focal Distance) | 26.6 mm | - | |
| Camera Modes | Slow motion video, Time-lapse mode, Pro mode, Auto Panorama | AI Portait, Night Mode 2.0, SpeedWarp camera mode, Action Cam mode, flash shot mode | |
| Light Source | LED flash | Dual 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, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 30fps, Slo-mo video 3840 x 2160 (4K) at 120 fps | - | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), 3-axis electronic image stabilisation, Wind Noise Filter, Motion tracking, Quad Bayer technology, HyperSteady, Free Zoom, Mic Focus, 2x1 On-Chip Lens (OCL), Quick Flip Angle camera | Corning Gorilla Glass DX+ (protective lens glass), UW Capture fusion |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 8 Megapixel | ASUS Zenfone 8 Flip has better second camera resolution than Nokia XR21. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/2.55" | - | |
| Sensor Name (2nd Camera) | Sony Exmor RS IMX363 sensor | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | - | |
| Pixel Size (2nd Camera) | 1.4 μm | - | |
| Minimum Focal Length (2nd Camera) | 14.3 mm | - | |
| Camera Features (2nd Camera) | Dual Pixel Phase Detect Auto-Focus (PDAF), Real-time distortion correction, Dual Pixel image sensor, 4cm macro photography | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 8 Megapixel | - | |
|---|---|---|---|
| Sensor Size (3rd Camera) | 1/2.55" | - | |
| Lens Type (3rd Camera) | Telephoto lens | - | |
| Pixel Size (3rd Camera) | 1.4 μm | - | |
| Optical Zoom | 3x | - | |
| Digital Zoom | 12x | - | |
| Camera Features (3rd Camera) | Dual Pixel image sensor | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 0 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | - | 16 Megapixel |
| BATTERY AND CHARGING | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 4800 mAh | ASUS Zenfone 8 Flip has larger battery capacity than Nokia XR21. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0, Power Delivery 3.0 | Qualcomm Quick Charge 3.0, Power Delivery 2.0 | Both phones have fast charging technology. |
| Recharge Time (Charging Time) | 1.7 hours | - | |
| Run Time Details | - | Mixed usage: up to 48 hrs | |
| Battery Technology | Lithium polymer | - |
| CELLULAR | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 5G | Both phones have the same mobile network generation. |
| Operating System | Android 11 | Android 12 | |
| User Interface | ASUS ZenUI 8.0 | - | |
| Navigation | GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC, A-GLONASS |
| COMMUNICATIONS | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Data Transmission | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE, DC-HSPA+, 5G NR FR1 | LTE, 5G NR | |
|---|---|---|---|
| 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 3, Band 4, Band 5, Band 6, Band 8, Band 19 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1800, 1700, 850, 800, 900, 800 | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 34, Band 38, Band 39, Band 40, Band 41, Band 42 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 42, Band 43, Band 48, Band 66, Band 71 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500, TDD 3700, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600 | |
| 5G NR Band | N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12 | N1, n2, n3, n5, n7, n20, n28, n41, n66, n71, n77, n78, n79, n40, n25 | |
| 5G NR Frequency | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12 | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 800, FDD 700APT, TDD TD 2500, FDD AWS-3, FDD 600, TDD TD 3700, TDD TD 3500, TDD TD 4500, TDD 2300, FDD 1900 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac/ax, Wi-Fi 6E | IEEE 802.11a/b/g/n/ac/ax | |
| Bluetooth | Bluetooth 5.2 EDR | Bluetooth 5.1 | |
| Bluetooth Profiles | A2DP | - | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Modem | Snapdragon X60 5G | Snapdragon X51 5G |
| MEDIA | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Supported Digital Audio Standards | Apt-X, apt-X HD | - | |
|---|---|---|---|
| Sound Enhancements | Dirac HD Sound, Hi-Res audio certified, OZO Audio, Qualcomm aptX Adaptive | OZO Playback technology, OZO spatial sound recording with wind noise reduction, audio boost mode | |
| Audio Amplifier | Dual NXP TFA9874 | - |
| FEATURES | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, G-sensor, hall sensor, gyroscope | Accelerometer, ambient light sensor, proximity sensor, digital compass, barometer, gyroscope | |
|---|---|---|---|
| Security Devices | Fingerprint reader (under display), face recognition | Face recognition, fingerprint reader (side) | |
| Security Technology | - | Face Unlock | |
| Additional Phone Features | MIMO technology, Power Saving Mode, AudioWizard, Smart Key, One Hand Mode, ASUS Noise Reduction technology, ARCore, dual stereo speakers, triple noise reduction microphones, system mode | Dual microphones, 4 years of Security Updates, dual stereo speakers, 3 years of OS updates, SOS light signal function |
| OTHERS | ASUS Zenfone 8 Flip | Nokia XR21 |
|---|
| Included Accessories | SIM card removal tool, USB-C to USB-C cable, protective case, power adapter (30 W) | SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | - | IP68, IP69K, MIL-STD-810H | |
| Product Recycled Content | - | 100 % - aluminium inner chassis | |
| Max Height of Shock Resistance | - | 1.8 m |
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