Q: I was using safari. I clicked on a page and on that time something appeared in my mobile screen that my iOS has been blocked and there is chance that my personal information like bank details will be exposed to hackers and so on.

I was using safari. I clicked on a page and on that time something appeared in my mobile screen that my iOS has been blocked and there is chance that my personal information like bank details will be exposed to hackers and so on. And a number was given to call immediately. I called this number and I spoke with a guy who said that iOS has been blocked and hackers  get my personal information. I asked this guy how can I fixed that problem and he replied that I have to pay money for that. He mentioned about two cost, one is £50 and other is £150. And the number to which I called is 0808 101 2172. I am worried that is it a scam?