Cellular standby while airplane mode

[yanuaryudha7]

Model: ZE553KL(Zoom)
RAM: 4GB
Firmware/App Version: Oreo 8.0
Location:
Frequency of Occurrence:
Rooted: No
App Name: Cellular standby
Screenshot: https://us.v-cdn.net/6031231/uploads/ww_attachments/201907/12/095507jvvudnxvi3ikpbru.jpg
Description: #ask Excuse me, I want to ask ... What is the standby cellular network actually on? Even though the position of the handphone after being turned on is still a state of Airplane Mode and Wi-Fi has also not been turned on. But how come the battery usage always appears, I become curious. Thanks for wanting to answer ...