Supposedly UK iOS, Android & Windows phone users are now being targeted by scam artists! These websites appear to block your phone and demand that you ring an 0800 number (often ending in 6211, 4895 or 3684) to unlock your device (at a cost of £50).
See below on how you can get rid of the error/scam.
Please pass on to those less tech savvy than you.
Thanks to Glenda for image