A poor quality touchscreen, insufficient RAM (1GB is standard for this model), or a slow processor. The YT9216BJ is an entry-level unit; no software update will transform it into a snappy flagship device.
Updates for these units generally follow one of two paths: an automatic local update via USB or a deep flash using PC tools if the unit is "soft-bricked." Method 1: Local USB Update This is the standard procedure for working units: Use a pen drive formatted to FAT32 . Yt9216bj-00012-v001 Update
After completing the YT9216BJ-00012-V001 update, the new firmware (e.g., V008 or V009) will be active. However, you are not done yet. A poor quality touchscreen, insufficient RAM (1GB is