If the 2.8 inch color display on your new Grandstream GXP2135 is too bright or dim out of the box, then follow these quick and easy steps to adjust the brightness! Because not all office settings are the same, Grandstream has made it simple to customize this small, but important detail on your new phone.
Start by pressing the round Menu button on the front face of the phone.
Then select Preference, followed by Appearance.
Once you are there, select Idle LCD Brightness. From there, you will be able to adjust the brightness of your screen by pressing the Left and Right arrow keys.
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