Windows 10 preview is upon us and as yet officially only the 520 has received the lumia denim update in India apart from the 535 which has it by build. When do microsoft plan on officially releasing the update here. None of the high end phones for which this update carries more significance has received the update. I think MS should make this update available as soon as possible here. 830s and 930s else where are receiving this upgrade. Why the delay here?