Windows 10: Mobile phone scam?

I got a call from +18553308653 claiming to be Microsoft and asked me to press the pound key to confirm sign in. I did not sign in to Microsoft at all when this happened nor have I used my account that day yet a received this call.

:)

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

Your list confirms my phone is eligible, Lumia 521. The windows Insider App fails after ~ 15 seconds, restores data and gives me error 80073cf9. I trouble shot this and went thru all the steps mentioned on several websites including MS without any luck. Short of a hard reset, this is where I am now. Suggestions appreciated.

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

When my phone fails to upgrade I just keep trying. One upgrade took 3 or 4 tries.

 

Phone scam

I now get no more weird foreign voices claiming to be from Microsoft's technical dept and many other such scams. We have been inundated with rubbish calls- before I added a call blocker device this reached 6 or 7 a day.

In the UK service providers have added a new free service that means callers are challenged to leave a short message, then press #. My phone then rings, and I have the option to add the caller to my approved list, accept this call but not add it, or simply not take the call.

I can manually add numbers to the blocked or approved list on line or using my phone.

The downside is any valid service (library reservations, some bank services) that rely on automated calls fail.

I have asked my service provider to consider adding a way to temporarily suspend the service.