Complex sentence: Sri Lanka's all mobile networks (Dialog, Mobitel, Etisalat, Airtel and Hutch) launched 3G services and Dialog & Mobitel launched 4G LTE services on Colombo.
Split into simpler sentences: Sri Lanka's all mobile networks (Dialog, Mobitel, Etisalat, Airtel and Hutch) launched 3G services. Now Dialog & Mobitel launched 4G LTE services on Colombo.