In depth comparison and review of Realme C21 and CAT S53. 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 | Realme C21 | CAT S53 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch - Rugged | |
| Height | 165.2 mm | 171 mm | CAT S53 has greater height than Realme C21. |
| Width | 76.4 mm | 81 mm | CAT S53 has greater width than Realme C21. |
| Depth | 8.9 mm | 16 mm | Realme C21 is narrower than Realme C21. |
| Weight | 190 g | 320 g | Realme C21 is lighter than Realme C21. |
| Body Colour | Cross black | Cross blue | - | |
| Protection | - | Shockproof, dustproof, waterproof, sandproof, dirtproof, drop-proof, vibration-resistant, temperature protection, salt mist protection, bleach resistant | |
| Waterproof (Water-resistant) | - | Yes | CAT S53 is waterproof. |
| IP rating | - | IP68, IP69K, IP69 | |
| Integrated Components | - | LED flashlight | |
| Connector Type | Micro-USB 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 | |
| SIM Card Configuration Details | - | Nano SIM + nano SIM/microSD |
| DISPLAY | Realme C21 | CAT S53 |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Display Technology | LCD | - | |
| Screen Size (Display Size) | 6.5" | 6.5" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 1600 x 720 pixels | Both phones have the same screen resolution. |
| Display Format | HD+ | HD+ | |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | 420 cd/m² | - | |
| Display Enhancement Technology | - | Super Bright Display | |
| Display Features | Mini-drop display | Glove & Wet Touch | |
| Display Protection (Screen Protector) | - | Scratch-resistant glass, tempered glass |
| PROCESSOR | Realme C21 | CAT S53 |
|---|
| Processor Type (CPU) | MediaTek Helio G35 | Qualcomm Snapdragon 480 5G | |
|---|---|---|---|
| Clock Speed | 2.3 GHz | 2 GHz | Realme C21 has higher clock speed than CAT S53. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | PowerVR GE8320 | - |
| MEMORY | Realme C21 | CAT S53 |
|---|
| RAM | LPDDR4X SDRAM - 3 GB | 6 GB | CAT S53 has more RAM than Realme C21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 128 GB | CAT S53 has more internal memory than Realme C21. |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSD |
| CAMERA | Realme C21 | CAT S53 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 2 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 48 Megapixel | CAT S53 has better camera resolution than Realme C21. |
| Lens Aperture | F/2.2 | F/1.79 | CAT S53 has better lens aperture than Realme C21. |
| Lens Construction | 5-element | - | |
| Focus Adjustment | Automatic | - | |
| Digital Zoom | 4x | - | |
| Special Effects | HDR | - | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | - | |
| Light Source | LED flash | Flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps | - | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 2 Megapixel | 2 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| Lens Aperture (2nd Camera) | F/2.4 | - | |
| Lens Element Qty (2nd Camera) | 3-element | - | |
| Camera Functions (2nd Camera) | B&W lens | Macro camera |
| 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 | 16 Megapixel | CAT S53 has better front camera resolution than Realme C21. |
| Lens Aperture (Front) | F/2.2 | - | |
| Lens Element Qty (Front) | 3-element | - | |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | - | |
| Face Recognition (Face ID) | Face recognition | - | Realme C21 has face detection. |
| BATTERY AND CHARGING | Realme C21 | CAT S53 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 5500 mAh | CAT S53 has larger battery capacity than Realme C21. |
|---|---|---|---|
| Wireless Charging | - | Yes | CAT S53 can be charged wirelessly. |
| Wireless Charging Standards | - | Qi | |
| Battery Technology | - | Lithium polymer |
| CELLULAR | Realme C21 | CAT S53 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | CAT S53 has more advanced generation mobile network. |
| Operating System | Android 10 | Android 11 | |
| User Interface | Realme UI | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | - |
| COMMUNICATIONS | Realme C21 | CAT S53 |
|---|
| Data Transmission | FDD-LTE, TDD-LTE | LTE, VoLTE, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 | |
| 3G UMTS Frequency | 2100, 850, 900 | 2100, 1900, 1700, 850, 800, 900, 800 | |
| 4G LTE Band | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | 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 28, Band 34, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 4G LTE Frequency | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | 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 700 APT, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | - | N1, n2, n3, n5, n7, n8, n28, n41, n66, n77, n78 | |
| 5G NR Frequency | - | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 700APT, TDD TD 2500, FDD AWS-3, TDD TD 3700, TDD TD 3500 | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11ax | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.1 | |
| NFC | - | Yes | CAT S53 has NFC reader for mobile payments. |
| FEATURES | Realme C21 | CAT S53 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, magnetometer, light sensor | - | |
| Security Devices | Fingerprint reader | - | |
| Additional Phone Features | Super power saving mode, HyperEngine technology, Reverse charging | Fast Charging, 2 years of Security Updates, programmable push-to-talk button, Android Enterprise Zero-touch enrollment |
| OTHERS | Realme C21 | CAT S53 |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool | - | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | IP68, IP69K, MIL-STD-810H | |
| Max Depth of Water Resistance | - | 1.5 m | |
| Max Height of Shock Resistance | - | 1.8 m | |
| Max Operating Temperature | - | 55 °C | |
| Min Operating Temperature | - | -25 °C |
cs
sk
de
it
es
fr
hu
pt
ru
pl
br
ro
