Hey peeps, while browsing through comments, I saw a few ppl having trouble with the 8.1 dp upgrade to cyan thingy. I am a dp user and when I tried to update 8.1.1, I couldn't update my phone because of this dumb error 0X88 something where my phone enters the spinning cogs and then it will just stop and switch the phone back on saying the update cannot be completed. My carrier has already approve Cyan. I downloaded the NSU, Nokia Software Updater if I'm right, it is a tool which is able to force update your phone to the latest version. I did it, unfortunately all my data is wiped out, luckily I backed up my phone. However, I got Cyan. After that I used dp to update to 8.1.1. Now I'm enjoying my phone.