When ı surf on Safari, when ever ı open a web page, it automatically directs me to ad's and I cannot use Safari
I cannot surf on Safari, there is something like virus which automatically directs me to some ad pages and it blocks me to reach web page that I want. May be you can say that this causes because of the web pages you open but it this also happens in very secure sites. For example bank's webpages, Facebook, forums... So I think that there is something which directly directs me to ad's.
iPhone 6, iOS 8.3