Find my iphone can Be acesss from any windows,browser or even another phone brand browser than iphone or safari
.find my iphone is an application for IPHONE'S
its happen with me many times, Iphone 5s gold . iphone 5 , & iphone 5 refurbished.
.and most common is that sucpi activities on your device. Example as using Multiple emails. accounts of Facebook/google..etc . In defferrnt devices that INCLUDE
you crashed iPhone,
as find my iphone was on .that means and always apple looking for the security of theier customer. if that so, then maybe your iphone actually ON but screen blackout
and that black out may take 2 hours to 4 days .. As the system checking that phone havnt been stolen or access by unauthorized person.
2- you may make purchase of an app from apple store and you dont have enough cash to cover the payment.