M1 today announce they have doubled 4G LTE network speeds boosting it to 300Mbps from the previous 150Mbps. They are also the first telco in Singapore to provide 300mpbs 4G service.
Although the upgrade announcement is welcomed by subscribers, the typical download speed range as specified on M1 Data Bundled Plans page falls within 43.0 to 115.1Mbps. That said, the stated typical speeds are still miles better than 3G typical speeds which range from 2.6Mbps to 8.6Mbps. Your mileage may vary depending on location and whether you are using the network on a fix location or on the move.