We just got information from reliable sources that point to a possible launch of the next Apple iPhone (presumable iPhone 5) in Singapore on 21st September.
The date coincides with what iMore and Jim Dalrymple of The Loop reported earlier - the first wave of iPhone launches will take place on 21st September. The information comes from sources that have provided HardwareZone with accurate launch dates in the past, which include the local launches of the iPhone 4S and Samsung Galaxy S III.
Note that at the point of publication, none of the telcos could be contacted for a comment (and we bet they can't anyway). Stay tuned for more updates as we try to wrangle out more information in time to come.