Samsung wifi turning on and off - Video tutorial on I fixed mine samsung galaxy S6 Edge Plus Wifi issue. You will see my wifi kept turning off and on again and again automatically without touching the screen.
If you are unable to see Improve Accuracy button, then check out these places
Go to Settings, turn off the Wifi and there you will see Scanning settings link below, click on that you will see Improve accuracy buttons OR Go to Settings, then go to Wifi tab, you will see Improve accuracy link there
http://techsalsa.com/fix-samsung-s6-edge-galaxy-phones-wifi-turning-off-on-automatically/

Some other workarounds to try:
1. Go to Settings - Connections - Wi-Fi - Advanced and make sure that Keep Wi-Fi on during sleep is set to Always.
2. Go to Settings - Connections - Wi-Fi - Advanced - Manage networks, tap on the problem network and then Forget. Reboot your phone and router, then set the connection up again from scratch.

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[Gear I Use]

➤ Cameras:
1. DSLR Camera: Canon EOS 80D
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2. Action Camera: GoPro Hero 7
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3. Samsung S8+ Camera
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➤ Microphones:
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2. Microphone splitter
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➤ Filming Accessories:
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2. Phone Stabilizer/Gimbal: Zhiyun Smooth Q
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3. DSLR Light Kit: LimoStudio 160 LED light
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4. DSLR SD Card: SanDisk Extreme Pro
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5. GoPro Micro SD Card: Lexar 64 GB
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