How to upgrade the software system online?

Please follow the below steps:
Go to Settings>System>System Update
1. If there is a new version:
We recommend you download the latest Nothing OS software version using Wi-Fi. Do not press the power button or perform any actions during the upgrade process, and wait patiently for the update to complete.
2. If there is no new version:
If there is no new version update, it means your phone has the latest version.