As Puzzle & Dragons continues to be updated on the Android platform, it becomes increasingly difficult to maintain compatibility with older operating systems while maintaining optimal in-game performance. Because of this, the content listed below featured in Ver19.4.0 will not be compatible for devices below Android OS 7.0.
Devices that are incompatible with 8-Player Mode (PvP) 　
-Android OS 7.0 and below
For players using devices below Android OS 7.0, we highly recommend updating your OS or moving to a device that supports Android OS 7.0 or above.
Players with devices below Android OS 7.0 will still be able to enjoy playing Puzzle & Dragons, but will not be able to play the game in the future when support for these older operating systems are diminished.
For Data Transfer to another Android OS device, see here: http://bit.ly/2MQVRjc
For Data Transfer between different operating systems, please see here: http://on.fb.me/1ojJgOf
Please be aware that the aforementioned information may change at any time.
Notes:
*If you have questions regarding your device’s current operating system in use or on how to update it, please contact the device manufacturer.
*Using the Data Transfer code will delete the save data stored in the previous device.