In depth comparison and review of Apple iPhone 6s and Realme C21. 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 | Apple iPhone 6s | Realme C21 |
|---|
| Product Type | Smartphone - refurbished | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | A1688 | - | |
| Form Factor | Touch | Touch | |
| Height | 138.3 mm | 165.2 mm | Realme C21 has greater height than Apple iPhone 6s. |
| Width | 67.1 mm | 76.4 mm | Realme C21 has greater width than Apple iPhone 6s. |
| Depth | 7.1 mm | 8.9 mm | Apple iPhone 6s is narrower than Apple iPhone 6s. |
| Weight | 143 g | 190 g | Apple iPhone 6s is lighter than Apple iPhone 6s. |
| Body Colour | Space grey | Rose gold | Gold | Silver | Cross black | Cross blue | |
| Body Material | Stainless steel, glass, anodised aluminium | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.98 W/kg (body), 0.87 W/kg (head) | - | |
| Connector Type | Headset jack - mini-phone 3.5mm Lightning |
Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Single-SIM | Dual-SIM |
| DISPLAY | Apple iPhone 6s | Realme C21 |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | Retina HD display with IPS technology | LCD | |
| Screen Size (Display Size) | 4.7" | 6.5" | Realme C21 has larger screen size than Apple iPhone 6s. |
| Screen Resolution (Display Resolution) | 1334 x 750 pixels | 1600 x 720 pixels | Realme C21 has better screen resolution than Apple iPhone 6s. |
| Display Format | - | HD+ | |
| Pixel Density | 326 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | 500 cd/m² | 420 cd/m² | Apple iPhone 6s has better display brightness than Realme C21. |
| Contrast Ratio | 1400:1 | - | |
| Display Features | Dual-domain pixels, Display Zoom, Reachability (screen shifting), Landscape Views | Mini-drop display | |
| Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating | - |
| PROCESSOR | Apple iPhone 6s | Realme C21 |
|---|
| Processor Type (CPU) | Apple A9 | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | - | 2.3 GHz | |
| Processor Core Qty | - | 8-core | |
| 64-bit Architecture | Yes | - | Apple iPhone 6s has 64-bit architecture. |
| Graphics System (GPU) | - | PowerVR GE8320 |
| MEMORY | Apple iPhone 6s | Realme C21 |
|---|
| RAM | - | LPDDR4X SDRAM - 3 GB | |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 16 GB | 32 GB | Realme C21 has more internal memory than Apple iPhone 6s. |
| Supported Flash Memory Cards (Expandable Memory) | - | microSD |
| CAMERA | Apple iPhone 6s | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 3 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 13 Megapixel | Realme C21 has better camera resolution than Apple iPhone 6s. |
| Sensor Type | BSI | - | |
| Lens Aperture | F/2.2 | F/2.2 | Both phones have the same camera lens aperture. |
| Lens Construction | 5-element | 5-element | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | 3x | 4x | Realme C21 has better digital zoom than Apple iPhone 6s. |
| Special Effects | - | HDR | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Burst mode, Panorama, Time-lapse mode, Timer mode | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
| Face Recognition (Face ID) | Face detection | - | Apple iPhone 6s has face detection. |
| Light Source | LED light | 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 | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Sapphire crystal lens cover, Cinematic video stabilisation, Focus Pixels, Cinematic video stabilisation, Live Photo, Playback zoom, Hybrid IR filter, Exposure control, noise reduction, geotagging | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (2nd Camera) | - | F/2.4 | |
| Lens Element Qty (2nd Camera) | - | 3-element | |
| Camera Functions (2nd Camera) | - | B&W lens |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Lens Element Qty (3rd Camera) | - | 3-element | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | 4cm macro photography |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 5 Megapixel | Both phones have the same front camera resolution. |
| Sensor Type (Front) | BSI | - | |
| Lens Aperture (Front) | F/2.2 | F/2.2 | Both phones have the same front camera lens aperture. |
| Lens Element Qty (Front) | - | 3-element | |
| Special Effects (Front) | - | HDR | |
| HDR Mode (Front) | Auto HDR mode | - | |
| Camera Modes (Front) | Burst mode, Timer mode | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | |
| Face Recognition (Face ID) | Face detection | Face recognition | Both phones have face detection. |
| Light Source (Front) | Retina Flash | - | |
| Video Resolutions (Front) | 1280 x 720 (720p) | - | |
| Camera Features (Front) | FaceTime HD camera, Exposure control | - |
| BATTERY AND CHARGING | Apple iPhone 6s | Realme C21 |
|---|
| Battery Capacity (Battery Size) | - | 5000 mAh | |
|---|---|---|---|
| Standby Time | 240 hours | - | |
| Talk Time | 840 minutes | - | |
| Run Time Details | Talk (3G): up to 840 min Standby: up to 240 hrs Active online usage (3G): up to 10 hrs Active online usage (LTE): up to 10 hrs Active online usage (Wi-Fi): up to 11 hrs Playback (video): up to 11 hrs Playback (audio): up to 50 hrs |
- | |
| Battery Technology | Lithium Ion | - |
| CELLULAR | Apple iPhone 6s | Realme C21 |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | iOS 9 | Android 10 | |
| User Interface | - | Realme UI | |
| Intelligent Assistant | Siri | - | |
| Payment Technology | Apple Pay | - | |
| Navigation | GPS, GLONASS | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | Apple iPhone 6s | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, DC-HSDPA, LTE Advanced, VoLTE, TDD-LTE, VoWiFi | FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 1900 CDMA2000 1X, 1700 CDMA2000 1X (AWS), 2100 CDMA2000 1X (AWS) | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | - | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 27, Band 28, Band 29, Band 30, Band 38, Band 39, Band 40, Band 41 | Band 1, 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 700a, FDD 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 800 SMR, FDD 700 APT, FDD 700d, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.0 | |
| NFC | Yes | - | Apple iPhone 6s has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | Apple iPhone 6s | Realme C21 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AIFF, PCM, Audible, MP3, Apple Lossless, AAC-LC, HE-AAC, Audible AAX, Audible AAX+, protected AAC | - | |
|---|---|---|---|
| Supported Digital Video Standards | AVI, MOV, M-JPEG, MPEG-4, H.264, M4V | - |
| FEATURES | Apple iPhone 6s | Realme C21 |
|---|
| 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, 3-axis gyro sensor, digital compass, barometer | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | Fingerprint reader | Fingerprint reader | |
| Additional Phone Features | Multitasking, FaceTime, AirPlay wireless streaming, AirPrint wireless printing, iCloud Photo Sharing, AirDrop function, Apple TV support (2nd, 3rd), MIMO technology, Wi-Fi Calling, iBeacon microlocation, CarPlay function, Family Sharing feature, QuickType keyboard, iCloud Keychain, Spotlight Search, Notification Center, M9 motion coprocessor | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | Apple iPhone 6s | Realme C21 |
|---|
| Included Accessories | USB cable, power adapter, Apple EarPods | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | HAC (Hearing Aid Compatible) | TUV Rheinland | |
| Max Operating Temperature | 35 °C | - | |
| Min Operating Temperature | 0 °C | - | |
| Humidity Range Operating | 5 - 95% (non-condensing) | - |
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