http://apple-care-warning.com

On iPhone 6 plus, when I click on Safari I am getting the following message, which comes back when I hit "OK":

" http://apple-care-warning.com

****Device at Risk****

Server Detected Security Error,

Due to Multiple Suspicious

Activity Found on Your Device.

Contact Apple Care Phone

Technicians 1-855-999-8074(Toll Free)"

A phone number search online shows the number belonging to "InstaSquad". My guess is this is phishing, etc. and not something i need to contact apple for. Would greatly appreciate any thoughts and suggestions for removing the pop-up.