According to Trai's 'Independent Drive Test Report' for May, there has been "general improvement" in the parameters
used for measuring the quality of 2G networks in Delhi-NCR.
Most operators have improved their network performance, Telecom Regulatory Authority of India (TRAI) added.
In most cases of 3G network, the call drop rate has deteriorated in comparison to the previous drive test, the
deterioration being highest in case of Idea, it said.
"In summary, the operators Airtel, Vodafone, Reliance, Aircel and Idea - need to further improve the call drop rate performance, the CDMA operators and MTNL need to improve across all parameters, in order to offer acceptable levels of service," the report added.
In Hyderabad, majority of operators failed to meet the call drop rate benchmark of two per cent.
Chandigarh is among the better performing cities where most of the operators met the call drop rate parameter with the exception of Airtel 2G, Videocon 2G and BSNL 3G.
"Airtel 2G and Videocon 2G are the only 2 operators who need to improve the quality of the network in Chandigarh," it said.
In Bhopal, Airtel and Vodafone met the call drop rate benchmark in their 2G networks, while Airtel only marginally
failed to meet the benchmark in its 3G network.
Idea, Reliance and BSNL have call drop rates in the range of 10 per cent or above.
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