Enabling Night light or blue light filter on iPhone 3GS can make the screen much easier to read at night time or darker environments. This reduces the blue light from the iPhone 3GS screen. This also helps our eyes while reading in the dark.
Phone Name: iPhone 3GS

How To Enable Night Shift on iPhone 3GS
Let’s learn how to Activate Night Shift on iPhone 3GS using two methods.
Method 1:
- Swipe up from the top right to access the control center of your iPhone.
- Now long press the brightness toggle.
- Here you can enable or disable Night Shift Option.
Method 2:
- Open settings app on your iPhone
- Click on the “Display & Brightness” option.
- Then choose the Night Shift option.
- Now you can manually Enable Night Shift by clicking on the “Manually Enable Until Tomorrow” option.
- Or you can Schedule it to turn on Night Shift automatically and switch off night shift after a particular time using the Schedule option.
- And you can adjust the amount of Blue light filter or setup it as Automatic.
How To Disable Night Shift on iPhone 3GS
To disable night shift on your iPhone 3GS, open the control panel window and long press the Brightness toggle and click on the Night Shift button to disable it.
If you had any problems while activating Night Shift (Blue Light Filter) on your iPhone 3GS, leave your comments below we will help you out.

Gowtham V is a tech blogger and founder of HowToDoNinja.com who is an expert in Technology & Software and writes awesome How-To Tutorials to help people online. He has 5 years of experience in creating websites and writing content. He uses a Windows PC, a Macbook Pro, and an Android phone. Check out more about our website and our writers on our About US page. Also follow me on Twitter page and Linkedin.