Mobile network speeds slowed down after updating to 7.1

Hi everyone

As the title reads, when I updated something seems to have happened to the network, and though the logo says "4G" in the bar, it is now three to four times slower than prior to updating, even slower than 3G. Loading a website now results in Safari hanging at least 50 percent of the time and that the other part it takes an average of 15 - 25 seconds to load simple websites.

Has anyone else experienced this?

It is a iPhone 5

Kind Regards