My S3 froze up so I removed the battery and now I can't connect to Wi-Fi at work or at a free access point in restaurants. I get random faults such as, authentication error occurred and out of range. I've done a soft reset which consisted of removing battery, micro sd card and sim card for 10 minutes. I also did factory reset and wiped all the data from it. It drops wi-fi constantly, its like the signal comes and goes when I know in the past that it has worked in the same locations. I

 

WOW, my old thread, the problem was a bad Wi-Fi board and I had to send it in under warranty and I got it fixed. It was the same phone with the same scratches on it when it returned and it works fine now for a year. Almost time for my Verizon Upgrade this December, I've got my fingers crossed for a Note 4 =)