Strange problem with 7.1

After enabling 3g i found delay in opening apps and it disappear after turning off 3g

My phone is 5s and i did OTA update

Any one else see this ???

 

I do that man and not helped i don't know what is this problem and it was working , i am sure it's from the update

 

Hay guys any help i already contact apple and guess what the told me to check with my carrier company and no problem in the phobe at all and i tried another carrier and problem solved but why i have to change my old number this is very strange and i found same complain from others in the feed back thread