New Delhi: Overall quality of mobile phone service in the country improved during three months period which ended on 31 December 2011, sector regulator Trai said.
However, according to data given Trai, few operators need to improve services like billing and calls drop.
The Indian Telecom Services Performance Indicators Report for October- December 2011 period released today showed Vodafone having the most number of disputes over post-paid bills as opposed to the prescribed limit of 0.1 percent by Telecom Regulatory Authority of India (Trai).
Vodafone did not respond to query sent for comments.
The regulator has noticed dispute in Vodafone post-paid bills in five telecom service area - Madhya Pradesh, Mumbai, North East, Rajasthan and Uttar Pradesh (West).
Trai has set benchmark that not more than 0.1 percent of bills issued should be disputed over a billing cycle for post-paid billing.
In case of pre-paid mobile charges, maximum disputes were with Uninor in three circles followed by BSNL in one circle.
For pre-paid charges the authority has prescribed the benchmark that there should be not more than 1 complaint per 1000 customers or 0.1 percent complaints for metering, charging, credit and validity.
As per the report, number of operators failing to meet metering and billing credibility criteria for post paid has come down from 10 to 4 and for pre-paid it has come down from 13 to 4 compared to telecom service providers performance during three months which ended on September 2011.
The report shows that worst affected cell sites having call drop of more than 3 percent has come down from 58 in third quarter of calendar year 2011 in last quarter of 2011.
Trai has found maximum calls drop in the network of state run telecom company BSNL across 15 telecom service area followed by Aircel in eight, Tata DoCoMo's GSM service in six, Vodafone and S Tel in four and Uninor in three service area.
Queries for comments did not elicit any immediate response.