How to raise OpenGL level on Android without GLtool

Android includes support for high performance 2D and 3D graphics with the Open Graphics Library (OpenGL®), specifically, the OpenGL ES API. OpenGL is a cross-platform graphics API that specifies a standard software interface for 3D graphics processing hardware.

if you want to change the OpenGL ES level

So you need to follow the steps.

step 1 : To extend OpenGL, you first need root access to your phone.

you need to root your phone for this process

step 2 : You need to download Root Browser Classic app

 

Name	Root Browser Classic
Size	4MB+
version	2.7.6.0
Download	5,000,000+>

minimum android 4.0 required

Download File

step 3 : Go to root directory of your phone by Root Browser Classic app

step 4 : Go to System folder in the root directory

• After that, there you can see a file called build.prop

step 5 : You need to edit that file. 

• You need to add a line 
• ro.opengles.version = 331072

After adding that line you need to save that file and reboot your phone.

And then you can test the OpenGL ES version by CPU-Z