An interesting article by Jérôme Segura for the Malwarebytes blog: Tech support scammers target smartphone and tablet users. With particular reference to scammers advertising support for Android.
You might also find this thread, flagged by my good friend Steve Burn, also of Malwarebytes, of interest: https://www.mywot.com/en/forum/42800-microsoftsupporter-com.
Added to the Tech Support Scam Resources page, of course.
Small Blue-Green World
ESET Senior Research Fellow