This happened when I first opened up my iPhone 6 on launch day. I tried connecting to the wifi during the set-up, and it couldn't find the wifi - It just kept searching and searching. After about 20 minutes, it finally found my wifi, and I was able to connect to it. It randomly disconnects, and it does the same thing... Takes about 20 minutes to reconnect. This happened a total of 3 times, in 8 days. Is this normal? Should I bring it into Apple and tell them? How will I prove that it has wifi problems, if the problem happens so randomly?