Malaysian mobile network operators Celcom Axiata and DiGi Telecommunications have extended their Memorandum of Understanding (MoU) for the exploration of long-term network and infrastructure collaboration, the Malay Mail reports. It is understood that the duo have extended discussions for a further three months, and as previously reported by CommsUpdate the MoU, which was initially signed in June 2010, focuses on three areas: operations and maintenance; transmission and site sharing; and radio access network. The proposed active sharing model under discussion is intended to generate significant operation and cost efficiencies for both cellcos. The pair, it is believed, are aiming to finalise a binding agreement by 31 January 2011.