WIFI issue

[Navi1529]

Hi all, recently when i tried to connect to the wifi network, it gives an error message saying cannot authenticate connection and it will connect after soo many attempts. Tried reseting the router and the network settings on the phone, but no luck. 

I have another samsung device and it gets connected at the first attempt. Its only this device which does not connect quickly. What would be the problem and how can i solve this? Thank you

[Valeriya]

Hi Navi1529, I suggest you perform a factory reset and get back to us with the results. But, before you try to factory reset you must back up your personal data prior as your personal information may be lost. If you have encrypted the microSD card, you must decrypt it before resetting the phone. Otherwise, your phone will not be able to read the data on the card. From Settings, search for and select Decrypt SD card, and then follow the on-screen prompts. 

From Settings, search for and select Factory data reset. Next, tap Factory data reset again and then review the information. When you are ready, swipe to and tap Reset. If you have a security lockset on the phone, you will be asked to enter the credentials.