At the end of January 2017 (2 months in), they had already installed towers covering some areas of Singapore. It is now the end of July, so they have had another full 6 months. My guess is the coverage is perhaps 60% complete.
I know, we aussies can't even build an Opera house properly, let alone quickly...In an Asian country e.g. Korea/Japan, this the norm. In a country as organised and efficient as Singapore, more so.