I purchased a new iPhone about three weeks ago. I love it. I have one problem with Safari that I have use for internet. When I am on website to read or browsing the website. It sometimes shuts down Safari and lock up my iphone screen black for 5 seconds and then go back to home page"Desktop" Then I had to go back and click Safari again and use internet again as it works. Sometime it shut down byself. Have any one experniced? Any thing I can do to solve the problem? Thanks.