First, update to version v1.2.9.15 via USB flash drive. Then, you can upgrade to v1.2.9.22 either via OTA (Over-The-Air) online update or USB flash drive. Finally, upgrade to the latest version either via OTA online update or USB flash drive.
Upgrade via OTA (Over-The-Air) update or USB flash drive to v1.2.9.22 version. Finally, upgrade to the latest version via OTA update or USB flash drive.
Upgrade directly via OTA (Over-The-Air) online or update to the latest version through USB flash drive.
https://www.youtube.com/watch?v=oqyssRTK9jo&t=7s
NOTE:
① For successful upgrade, please update the firmware to version v1.2.9.22 from versions prior to v1.2.9.22, Then upgrade to the latest version via USB flash drive or online update.
② v1.3.1.4 includes a privacy agreement, where users need to agree to use network functions for remote printing or monitoring. If not agreed, even after binding Creality cloud APP, the printer will always stay offline in Creality Cloud.