One of the five mobile network operators of the United Kingdom, Three UK has reportedly topped the internet and phone complaints table compiled by the telecommunications regulator of the United Kingdom, Ofcom.

Three UK was cited by the regulator in its complaints table as the mobile service operator, which drew the maximum complaints from the consumers. Three UK topped the list with 0.15 complaint for every thousand customers during the period between 2010 October and 2011 February.

On the other hand, the mobile network operator of the United Kingdom that emerged the happiest wit their customers, as regards to the complaints list prepared by Ofcom has been O2.

O2, the long time leading mobile network operator in the United Kingdom, untill the merger of the UK operations of T-Mobile and Orange resulted in the forming of Everything Everywhere (the leading mobile network at present) faced just 0.04 complaints for every thousand customers.

Meanwhile, the most complaint about supplier of broadband and landline services during the same period has been the British telecommunications giant TalkTalk, according to the regulator.