Singtel 's outdoor coverage was below 99.6 % before 2015 .
Singtel Mobile was the first mobile phone operator in Singapore to launch the iPhone in 2008.As of fourth quarter of 2014 , Singtel 's 4G outdoor coverage was at 99.41 % , ranked first followed by M1 's 99.04 % , and Starhub 's 98.95 % .
Singtel