| Secret codes Coolpad Cool 21 | 
| Root Coolpad Cool 21 | 
| Unlock Coolpad Cool 21 | 
| Firmware Coolpad Cool 21 | 
| Developer Mode Coolpad Cool 21 | 
| Bypass Lock Screen Coolpad Cool 21 | 
| Remove a Google account Coolpad Cool 21 | 
| Coolpad Cool 21 Factory Reset | 
| Screenshot Coolpad Cool 21 | 
 
| OS: Android v11 CPU: MediaTek Helio G80 RAM: 6 GB Display: 6.52 inches Camera: 48 MP  8 MP  2 MP Battery: 4500 mAh | 
| Hardware and OS Coolpad Cool 21 | |
| Operating system: | Android v11 | 
| Processor: | MediaTek Helio G80 | 
| RAM: | 6 GB | 
| Internal Storage: | 128 GB | 
| Display Coolpad Cool 21 | |
| Type: | IPS LCD | 
| Size: | 6.52 inches | 
| Resolution: | 720 x 1600 Pixels | 
| Pixel Density: | 269 ppi | 
| Touchscreen: | Yes, Capacitive Touchscreen, Multi-touch | 
| Connectivity Coolpad Cool 21 | |
| Network support: | 4G , 3G, 2G | 
| WI-FI: | Yes, Wi-Fi 802.11, b/g/n | 
| Gps: | Yes, with A-GPS | 
| Bluetooth: | Yes, v5.0 | 
| Dual SIM: | Dual SIM, GSM GSM | 
| SIM size: | SIM1: Nano, SIM2: Nano | 
| USB connectivity: | Mass storage device, USB charging | 
| Camera Coolpad Cool 21 | |
| Main camera: | 48 MP 8 MP 2 MP | 
| Front camera: | 5 MP | 
| Front camera resolution: | 5 MP | 
| Camera features: | Digital Zoom, Auto Flash, Face detection, Touch to focus | 
| Flash: | Yes, LED Flash | 
| Autofocus: | Yes | 
| Video recording: | Yes | 
| Multimedia Coolpad Cool 21 | |
| Audio jack: | 3.5 MM | 
| Loudspeaker: | Yes | 
| Design Coolpad Cool 21 | |
| Height: | 164.3 mm | 
| Width: | 75.66 mm | 
| Thickness: | 8.65 mm | 
| Weight: | 199.6 grams | 
| Colours: | Earl Black, Secret Sea Blue, and Cocoa White | 
| Battery Coolpad Cool 21 | |
| Capacity: | 4500 mAh | 
| Type: | Li-Polymer | 
| Other Coolpad Cool 21 | |
| Fingerprint sensor: | Yes | 
| Fingerprint sensor position: | Side | 
| Other sensors: | Accelerometer, Proximity | 
|  | DabNacy | March 13, 2024 | 
| Feature phones are affordable, have a long battery life, durable, easy to use, have physical buttons, and can be a backup. | ||
| Reply | ||
|  | Bcxcpo-Xam | May 11, 2024 | 
| Limited features, outdated technology, small screen, low resolution, slow performance. | ||
| Reply | ||
|  | Gavlky | May 12, 2024 | 
| Good phone with solid features overall. | ||
| Reply | ||