I just got another Lumia Icon and was looking to update it to the current Windows 10 mobile release. The last time I had one I got it up to version 1709 . While trying to update my current ICON I got the error code 0x80070273 which has something to do with build 15063. So my question is I saw where someone had suggesting FAST RINGING past that build. Could some please explain to me how you do that. Do you upgrade to a certain point and then change you insider settings. Any help would be appreciated. Oh, one more thing, when I got my previous ICON to the 15252 is was spoofing it as a LUMIA 550. Just thought I would add that info...