After upgrading to Win 10 last Friday I can't use find my phone it always give me phone not found. Tried disabling and re-enabling both location and find my phone options in settings with no luck.
Any advice?
Not tried it myself. Might get a chance later.
If you've hard reset the device and its still not active, might have to wait for the next Technical Preview release. And not lose that phone in the meantime.
On the Windowsphone.com it says that phone os Is 8.1 that means phone didn't contact microsoft servers since update. But the microsoft account on the phone is synced ok.