The Telecom Regulatory Authority of India (TRAI) has released the findings of its Independent Drive Test (IDT) conducted across Dibrugarh and Tinsukia districts in Assam, offering consumers a detailed assessment of mobile network quality delivered by telecom service providers. The tests were carried out from April 13 to 17, 2026, under the supervision of TRAI’s Regional Office, Kolkata, covering 374.5 km of city routes, 13 hotspot locations and 2.2 km of walk-test areas.
The exercise evaluated key Quality of Service (QoS) parameters, including network coverage, Call Setup Success Rate (CSSR), dropped call rate, call silence instances, speech quality, and data download and upload speeds across 2G, 3G, 4G and 5G networks using live voice and data sessions.
According to the report, Reliance Jio recorded the highest average download speed at 225.08 Mbps, followed by Airtel at 116.52 Mbps, Vodafone Idea at 27.27 Mbps and BSNL at 9.81 Mbps. Airtel reported one dropped call out of 447 established calls, Reliance Jio recorded two out of 446, Vodafone Idea 11 out of 445, while BSNL registered 144 dropped calls out of 501 established calls. Coverage gaps and call silence instances also varied among operators, with TRAI mapping affected locations for further action.
The drive covered areas including Dibrugarh Airport, Naharkatia, Duliajan, Digboi, Makum and Tinsukia, along with key public locations such as Dibrugarh Railway Station, Dibrugarh University, IOCL Digboi Refinery, Tinsukia Medical College and Hospital, and Assam Medical College and Hospital.
From a Guwahati market perspective, the findings are significant as the city remains Assam’s largest telecom and digital services hub, where network reliability is critical for businesses, startups, educational institutions and consumers. The publication of independent performance data is expected to encourage operators to strengthen infrastructure and improve service quality across the state, while helping users make informed choices based on objective network performance indicators. TRAI said the findings have been shared with the respective telecom operators for necessary corrective measures, with the detailed report available on its official website.