Android client: if can't open client or download update error, try download new full client.
Download Link.
If you got low FPS or rendering error or want old graphics, try open "System" -> "Graphics" -> "Rendering Quality" choose "Low".
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Mobile version new skill casting:
Press and hold skill button to picking near target.
or Use quick target button picking near target then click skill button.
or Use default attack button picking near target then click skill button.
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Camera too near:
Change camera type to "TOP Original"