Please tell us some basic information before asking for help:
Model Name: ZB601KL
Firmware Version: 0.56
Rooted or not: NOT
Frequency of Occurrence: NORMAL
APP Name & APP Version (If your issue relates to the app): FOTA
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
NEED 0.63 UPDATE REVIEW. ANY BUGS? HOW'S THE SOUND, BATTERY AND PERFORMANCE?