11.20 Why can't I connect my phone to an OTG cable? 
 
When you connect an OTG cable to your phone, the phone functions as a card reader. 
Check whether your phone supports a microSD card and the USB drive function. If not, 
use another phone. 
 
Check whether the microSD card was inserted into the phone correctly. 
 
If a microSD card has already been inserted, check whether USB drive mode is activated 
on the connected phone. 
 
When an OTG cable is used to connect your phone to a USB storage device, the phone 
provides power to the device. Certain USB storage devices that have a high power rating 
such as portable hard drives or phones may not function properly. 
11.21 Why can't I connect my phone to a USB drive using 
an OTG cable? 
The USB drive may be incompatible with your phone. Try again with another USB drive. 
11.22 Can I connect my phone to a mouse or a keyboard 
using an OTG cable? 
Yes, if your phone supports OTG. When connected, the phone provides power to the mouse or 
keyboard. Certain devices with a high power rating may not work properly. In this case, use 
another mouse or keyboard. 
11.23 Why can't I transfer files to another Bluetooth device 
that I've already paired with? 
 
The distance between your phone and the other Bluetooth device is over 10 meters. 
 
The other Bluetooth device did not respond to your file transfer request in time. 
 
The other Bluetooth device doesn't support the format of the file you are trying to send. 
11.24 How do I view my phone's MAC address? 
When the phone is connecting to a Wi-Fi network that uses MAC filtering to ensure secure 
access, you need to find the phone's MAC address and add it to the wireless network's access 
list. 
Go to Settings and select About phone > Status to view the phone's MAC address.