To provide specific information about downloading firmware for KOOLNEE mobile devices, I’d need more details. Typically, firmware updates for smartphones like KOOLNEE are released by the manufacturer to improve device performance, fix bugs, or introduce new features.
| Mobile Name | Version | File Size | Download Link |
| KOOLNEE Apex | Download Here | ||
| KOOLNEE K1 | Download Here | ||
| KOOLNEE K1 Trio | Download Here | ||
| KOOLNEE K3 | Download Here | ||
| KOOLNEE K5 | Download Here | ||
| KOOLNEE Opeth | Download Here | ||
| KOOLNEE Rainbow | Download Here |