Why does the mobile phone only show reverse charging when connected to a USB flash drive?

Solution to the problem that only reverse charging is displayed when the USB flash drive is connected to the mobile phone: First, make sure that the mobile phone supports OTG expansion. You can check whether the mobile phone supports the OTG function by consulting the customer service of the brand's mobile phone; then connect the USB flash drive to Typec Connect the adapter to the phone and turn on the phone; finally, in the notification bar, only "Reverse charging of the device via USB" will be displayed.

#1. It is necessary to make sure that the mobile phone supports OTG expansion. You can check whether the mobile phone supports OTG function by consulting the customer service of the mobile phone of the brand.

#2. Make sure that the mobile phone connection interface is normal and there is no bad contact. Generally, normal charging means it is normal.

#3. Make sure that the USB to Type c converter and U disk are in normal use and there is no bad contact. You can try changing the adapter or connecting the U disk to the mobile phone.

#4. Connect the U disk to the USB to Type c adapter and connect it to the mobile phone, and turn on the mobile phone.

#5. Come to the main interface. Under normal circumstances, you will see the icon as shown in the upper left corner of the interface, and pull down the notification bar.

#6. In the notification bar, you can see two options: [U disk] and [Reverse charging device via USB], indicating that the U disk has been successfully connected. And files can be transferred normally.

7. When unplugging the U disk and keeping the U disk connected to the USB to Type c adapter, only the notification bar will display [Reverse charging device via USB] option.

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