I have a Lumia 1520 (RM-937) which is running on preview for developers. My question is do I have to do something in order to get the Lumia Denim update? or Do I have to wait a bit more? Why I try to update the phone, it says phone up to date. I tried updating after switching off preview for developer but still the same result. But the weird part is, I checked the extras+info and it says Lumia Denim. I think that's just a bug. So what should I do?