My WiFi on samsung galaxy doesn't work and it did

the problem is in the wifi. The network is unstable

I dont know about 20.1 however if is 10.1 go to settings>wireless& networks>wifi>turn wifi on>wifi settings and sure you should find the open wifi with strong signal.If you dont have the security code or access code to the available wifi then there is no way.

1. With the Samsung Galaxy TAB turned off, press and hold the VOLUME Down button, and then briefly press the POWER button.

Note: If you see "Downloading" on the screen with an Android shoveling you pressed the wrong Volume key. Remove and reinsert the battery and try again.



It should hard reset any of these tablets:
Reset GT-P6210 Galaxy Tab Plus 7.0 WIFI
Reset GT-P6200 Galaxy Tab Plus 7.0 WIFI + 3G
Reset GT-P6810 Galaxy Tab 7.7 WIFI
Reset GT-P6800 Galaxy Tab 7.7 WIFI + 3G
Reset GT-P7310 Galaxy Tab 8.9 WIFI
Reset GT-P7300 Galaxy Tab 8.9 WIFI + 3G
Reset GT-P7510 Galaxy Tab 10.1 WIFI
Reset GT-P7500 Galaxy Tab 10.1 WIFI + 3G

+Hi, I know how frustrating this issue can be. I finally shut every thing down...the android, the wifi connection and the modem. When I turned the android back on, and of course, the modem had reset, so I then reentered the wifi settings on the android. I'ts been working ever since. Good luck.

1. With the Samsung Galaxy TAB turned off, press and hold the VOLUME Down button, and then briefly press the POWER button.

Note: If you see "Downloading" on the screen with an Android shoveling you pressed the wrong Volume key. Remove and reinsert the battery and try again.



It should hard reset any of these tablets:
Reset GT-P6210 Galaxy Tab Plus 7.0 WIFI
Reset GT-P6200 Galaxy Tab Plus 7.0 WIFI + 3G
Reset GT-P6810 Galaxy Tab 7.7 WIFI
Reset GT-P6800 Galaxy Tab 7.7 WIFI + 3G
Reset GT-P7310 Galaxy Tab 8.9 WIFI
Reset GT-P7300 Galaxy Tab 8.9 WIFI + 3G
Reset GT-P7510 Galaxy Tab 10.1 WIFI
Reset GT-P7500 Galaxy Tab 10.1 WIFI + 3G

Some Galaxy Tab devices have crosstalk between wifi and bluetooth that causes signal interference.

Try turning off Bluetooth.

hi,
how to unlock samsung galaxy tab after too many attempts pattern i dont have wifi connection also,

make sure your wifi network is turned on, then open your tablet's wifi and search for it. it should be fine, if not, contact Toshiba for tech help.
Android 4.0 Tablet PC

restore your mobile to the factory defualt settings
it will work