Wifi can be used on the Samsung Galaxy S3 to allow your smartphone to connect onto the internet via a wireless hotspot. This can be convenient for you on the train or at home, since you don't have to worry about going over your mobile phone data allowance. If you are trying to gain a more stronger wireless signal on your device, you can enter a special secret code. This will then allow you to remove the power save feature that reduces the power of the internal antenna. Doing this modification will allow you to gain more access points, however bear in mind that it will reduce the battery life span.
1) Open the dialer screen on your smartphone.
2) Enter the special access menu code into your device '*#0011#'.
3) Tap the left menu key and highlight the option called 'Wifi'.
4) Turn off the 'Wifi Power Save Mode' option by tapping the button it should change from 'On' to 'Off' position.
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