I was looking at my battery usage when I found this thing at the top of the list. Does anyone know what it is?
[Re-Titled by Moderator]
Also here’s a tip, if you are going somewhere and you know there won’t be cell coverage, turn on Airplane Mode.
I believe you are referring to the No Cell Coverage. That means your iPhone was searching for a Wi-Fi or cellular signal or being used in a low signal environment, and this affected your device's battery life.
The no cell coverage thing at the top
If you mean No Cell Coverage it means that your phone is not connected to a cellular network, but it keeps trying to connect, which uses a lot of energy.
Strange icon in iPhone settings' battery section
