wi fi connection problem on my S3 after ypgrading to 4.1.2

[Mohamed Salah1]

Hi,
i just got my phone 3 days ago, when i bought it it was working properly and i had no problem with WiFi even with 4.1.2, but since yesterday it started refusing to join some wifi networks, even at my home, it was connecting normally then it doesn`t want to connect at all
what i noticed iis that i might need to downgrade my software to 4.1.1, so how can i do this safely, and is there any other option to solve this problem?
regards

 

[Dreamliner330]

Have you tried a factory reset? Also, Samsung phones have connectivity issues, not too late to rethink your purchase.