iPhone 6 internet connection is horrible.

I got my iPhone 6 with iOS 8 yesterday but I am really disappointed. I feel like I am using the first iPhone. Internet connection both WiFi and Cellular is so poor. Although I have the fast WiFi network iPhone 6 is very slow when it try to open page using Safari or apps. I have company iPhone 5 and it is much faster than the new phone. Please help? Anyone has any issue like me