[Phone] Troubleshooting - Device cannot read/detect memory card

Please follow the steps below for troubleshooting:

1. Take out the memory card, clean the metal contact part and install the memory card again. 

2. Install the memory card to other phone devices or card reader to test whether the error comes from memory card.

3. Test the detecting function with another fine memory card to see whether the error results from the phone device. 

4. If you have formatted the memory card with card inserted into computer, memory card will not be read when  you install it  to the phone device again. 
 It's because the card formatted on computer is not compatible to phone device. 
 Please insert the memory card to your phone and format the memory card again. 

5. Update the system firmware to the latest version:  Go to Settings > System > System Update > Check Update.

If the steps above can't solve your issue, please contact ASUS Customer Center for help.