Identify Samsung device is not connected to the network by wifi icon with exclamation mark.
Too many users or routers work continuously causing overload from which you cannot connect to Wifi.
You fix by operation Reset Wifi Router: press the power off (Power) button and open the Router again.
Far away from the Router makes the Wifi wave weak a lot, affecting the connection process. You should get closer to the area where the wifi router is located to get better reception.
Wifi has changed the Wifi password, making the device unable to access the network. You need to delete (Forgot Wifi Network) and re-login with new password.
Step 1 : You go to "Settings".
Step 2 : Choose "Connection" and choose "Wifi".
Step 3 : Select to press and hold the Wifi network that is not connecting and select Forget.
Step 4 : Ask again for the Wifi password and login again.
Percussion types differ in character conventions that make the password incorrect during password entry. You should turn on the display of characters in the password input process to make it easy to see if you entered it correctly.
Note: Contact your carrier to check if the connection is disconnected by the network operator if you follow the article but still can't fix it.
Above are some ways to fix the error Samsung could not connect to Wifi for your reference and wish you to use a stable Wifi connection to complete the job.
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