Vodafone Ghana has, for 15 months consecutive months, maintained a clean sheet in terms of voice quality of service (QoS), while all the other five telcos recorded and continue to record various levels of breaches over the period.Minister of Communications, Dr. Edward Omane Boamah therefore commended Vodafone for working hard to achieve the regulator’s QoS key performance indicators (KPI), and also meeting customers’ expectation over that long period.He was speaking at the opening of the International Telecom Union’s (ITU) Quality of Service Development Group (QSDG) meeting in Accra. This is the Group that sets standards to improve telecom services across the world.The NCA’s periodic QoS Reports, which is based on the Cellular Mobile License obligations, shows how the six telecom operators in the country are doing in terms of call drops rate, call congestion rate, call set up time and stand-alone dedicated control channel (SDCCH) congestion rate.The law allows telcos up to one per cent each of call congestion and SDCCH congestion rates, and also allow up to 3% call drops rate. It also insists that for 95% of the time, calls should be set up within less than or up to 10 seconds.Call set up rate means, if a person makes a call from Vodafone to any other network for instance, it has to take only up to 10 seconds for the call to register on the receiver’s handset. If it took more than 10 seconds, it is a failure.In terms of congestion rate and SDCCH congestion rate, the law allows only one out of 100 calls to be affected by congestion; anything above that is a breach of the QoS KPI’s.And 3% call drop rate means out of every 100 calls, only three are allowed to drop. If more than three out of 100 calls drops, that constitutes a breach of the QoS indicators.The QoS tests, according to the NCA, are carried out in various localities and the results are based on user’s perspective among other factors.A close look at the NCA’s published QoS Reports indicate that the last time Vodafone was fined was in April 2012, and it was GHS50,000 for call set up breaches in the Western region. But it has since either recorded zero or negligible amount of breaches from May 2012 to July 2013.Vodafone has, by this feat avoided any fines, while its competitors continue to suffer fines and or warnings from the NCA regularly.