The numbers given in the the warning are 1-800-480-4170?
in the U.S. or 0800 279 6211?
or 0800 652 4895?
While other users have reported a message saying There is a problem with the configuration of your iOS.
kindly call Apple Technical Support.
Some users said the pop-up had frozen activity on their web client.
Many users in UK and US have already fallen prey to the scam.
Heres how to prevent the pop ups.
To prevent the issue happening again, go to tweaks -> Safari -> Block Pop-ups.
source: www.techworm.net