Bahrain's regulator has directed telecommunication firms to improve their performances, after an increase in the number of complaints about poor voice quality and unstable data services, the Gulf Daily News reported. A Telecommunications Regulatory Authority (TRA) audit last month found that 2 percent of calls failed while 1 percent of calls were dropped. Each mobile network operator has been asked to investigate and report the reasons for the level of call failures and dropped calls, and to take appropriate action. The percentage of calls that lasted for two minutes stood at 96.8 per cent. Meanwhile, average web downlink speeds increased significantly, with ranges between 3,400 kbps and 5,600 kbps depending on the network.