Wi-Fi Won’t Turn on Samsung Notes Mobile phone. 三星手機Wi-Fi不能開啟

Wi-Fi Won’t Turn on Samsung Notes Mobile phone.
三星手機Wi-Fi不能開啟

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The reasons why your Android Wi-Fi won’t turn on

If you are using an android smartphone, it may sometimes won’t turn on for several reasons.
The most common reason could be low memory space in your device.
Check the RAM manager and see if the free memory is less than 45 MB. If it is, the Wi-Fi won’t turn on normally.
The other reason may be the fact that power saving mode is on.
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Solutions for “Wi-Fi won’t turn on” problem

Clear memory

To solve the problem, go to RAM manager. Then perform a level 1 clear of the memory.
If the problem is not solved, then perform level 2 clear of the memory.
After performing this you will see that almost 800 MB of memory will be free. Level 2 clear of the memory
helped many users to fix the issue.

• Level 1 clears all the apps that are running
• Level 2 clears your hidden programs that are running in the background.

Reboot The Phone

Try rebooting the device once to see if the issue related to Wi-fi is fixed. To do so:

• Turn on the Airplane mode on your device by pulling down the notification area.
• Next power off the device completely.
• Now pull out the battery and keep the phone in this condition for 5 minutes.
• Press down the power button for a minute without inserting the battery.
• Re-insert the battery and then power on the device by pressing the power button.
• Now check if the problem is resolved.

Turn WIFI Power Saving Mode Off

One of the main reasons you are having a problem with your wifi on your Samsung Galaxy /Android,
is due to power saving mode.
To turn this mode off navigate to:

• Dialer
• dial: *#0011#
• This will open up the service mode
• Press the menu key
• Click WIFI
• By default, the power-saving mode remains on in some of the Galaxy devices, switch them off.

refer to :
https://www.technobezz.com/turn-wifi-on-wont-android-samsung/