M1 has just release/launch their LTE network today, 20 June 2011, scheduled to be nationwide by Q1 2012!
At its launch, the LTE network covers major areas within the financial district, including Marina Bay, Suntec, Shenton Way and other areas, as shown by the map below. Coverage is being progressively expanded and is scheduled to be nationwide by the first quarter of 2012.
Source: M1
