Need help about virtual memory!!

Jun 22, 2017
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I have increased my virtual memory by 589 ,,,, and now I wnt to go back to my original memory of 256 ..
Because of low phone memory and I can't even install my updates,
So help me in ,HOW CAN I CHANGE MY VIRTUAL MEMORY TO(256).???????
 
never used that feature nor sure if it exists in the phone but if nothing works then try to make a hard reset to ur phone. or before that try to close all apps and other data that may consume the RAM and then clean the virtual memory by some command from the menu.