TRAI Assesses Mobile Network Quality across South Tripura District and adjoining areas in the State of Tripura under North East LSA.

Information Note to the Press (Press Release No. 101 / 2026) TELECOM REGULATORY AUTHORITY OF INDIA www.trai.gov.in New Delhi, 23 July, 2026 For Immediate Release TRAI Assesses Mobile Network Quality across South Tripura District and adjoining areas in the State of Tripura under North East LSA. The Telecom Regulatory Authority of India (TRAI) has released findings of Independent Drive Test (IDT) conducted across South Tripura District and adjoining areas in the State of Tripura under North East LSA, during the month of May 2026, for information of general telecom consumers. The purpose of this drive test is to assess and verify real time quality of mobile network services (both voice & data) provided by Telecom Service Providers (TSPs). During the IDT, TRAI captures performance of TSPs for key Quality of Service (QoS) parameters like Coverage, Call Drop Rate (CDR), Call Setup Success Rate (CSSR), data Download (DL) and Upload (UL) throughput etc., which are then published to inform Consumers and encourage TSPs to improve their services. 2. These IDTs have been designed to capture on ground mobile network performance of all TSPs across diverse usages environment like cities, hotspots, public transport hubs, etc. In this type of drive testing, live data and voice sessions are established using SIM cards from all TSPs over 2G, 3G, 4G, and 5G networks. Multiple advanced test handsets are used, and the sessions are monitored and analysed in real-time using advanced Software Systems. 3. TRAI, through its appointed agency, conducted drive tests across City drive – 244.2 KMs, Hotspot locations - 9, Walk Test – 1.6 KMs in Tripura State during 13th May 2026 to 16th May 2026 in North East LSA. These tests were conducted under the supervision of the TRAI Regional Office Kolkata. The observations presented in drive test reports represent the performance of the TSPs on the area/ route under test on the day/ time of conducting the drive test. 4. Drive Test Route Map: The following map provides overview of drive test routes indicating City drive, Inter-operator calling, Hotspots and Walk tests, as per the legends shown on the map: - 15. Key Parameters Assessed a) Coverage Gap: Percentage of samples, for which signal strength observed less than the minimum prescribed signal strength for respective technology (2G/ 3G/ 4G/ 5G). b) Voice Services: Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Call Setup Time, Call Silence Rate, Speech Quality (MOS). c) Call Silence Instance: Number of call silence instance occurred during the calls. d) Data Services: Download/ Upload Throughput, Latency, Jitter, Packet Drop Rate 6. The overall mobile network performance in South Tripura District and adjoining areas for the key parameters has been summarised below: - a) Coverage Gap - The signal strength observed during voice testing on the city drive test route in auto-selection mode (5G/4G/3G/2G), measured as the number of samples having poor signal strength out of the total samples collected, was 6217/ 30754 for Airtel, 11854/ 28800 for BSNL, 7590/ 35527 for RJIL and 8627/ 19553 for VIL. Details of the coverage gaps have been provided in the map Annexed. b) Dropped Calls - Dropped calls, measured as the number of dropped calls out of the number of successfully established calls, were 9/ 221 for Airtel, 22/ 176 for BSNL, 2/ 254 for RJIL and 24/ 148 for VIL. Details of the dropped call locations have been provided in the map Annexed. c) Call Silence Instance - Call silence instances, measured as the total number of silence instances observed for > 3 seconds out of the total calls established, were 17/ 201 for Airtel, 24/ 131 for BSNL, 20/ 244 for RJIL and 6/ 99 for VIL. Details of the call silence instance locations have been provided in the map Annexed. d) Data Download and Upload Throughput: i) Data Download performance (Overall): Average download speed was observed as 88.67 Mbps for Airtel (5G/4G), 10.64 Mbps for BSNL (4G/2G), 46.11 Mbps for RJIL (5G/4G) and 35.19 Mbps for VIL (5G/4G/2G). Detail of Download throughput has been provided in the map Annexed. ii) Data Upload performance (Overall): Average upload speed was observed as 17.32 Mbps for Airtel (5G/4G), 3.25 Mbps for BSNL (4G/ 2G), 3.83 Mbps for RJIL (5G/4G) and 6.84 Mbps for VIL (5G/4G/2G). Detail of Upload throughput has been provided in the map Annexed. Locations of Dropped Calls and Call Silence instances can be seen by clicking red dot on the map Annexed. 7. Details of drive test route and area covered during the IDT is as under: - a) City - The areas covered in the city drive Rajnagar, Belonia, Paikhola, Rajapur, Santirbazar, Baikhora, Jolaibari, Gardhang, Bhuratali, Manu Bazar, Kalachara, Sabroom, Baishnabpur, Dakshin Manu Bankul and Matai etc. in Cities and Adjoining areas of South Tripura District. b) Hotspot - The hot spot locations, capturing stationary user experience, are (i) Belonia Sub Post Office Bank Rd Opp. to Old Motor Stand Belonia; (ii) District Court Belonia; (iii) District Hospital Santirbazar; (iv) Iswar Chandra Vidyasagar College Belonia; (v) Jolaibari BDO Office Muhuripur R.F.; (vi) Manu H.S. School Manu Bazar; (vii) Sabroom Sub-Divisional Hospital Sabroom; (viii) The Court of Additional District and Sessions Judge Sabroom; (ix) Trishna Wild Life Sanctuary Belonia Joychandrapur. 2Annexure 1. South Tripura District (City drive) a) Coverage Gap – The coverage distribution found less than the minimum specified signal strength for the drive test route in auto-selection mode (5G/4G/3G/2G) during voice testing, is as below: Parameter AIRTEL BSNL RJIL VIL Total Number of Samples captured on Drive test route 30754 28800 35527 19553 Number of Samples having poor signal strength 6217 11854 7590 8627 Number of Samples having limited service (No 3592 3198 0 10494 Coverage) Note: Signal strength has been considered poor if it falls below −110 dBm for 5G & 4G, −90 dBm for 3G, and −85 dBm for 2G. Coverage Gap observed A I R TEL BSNL Note: Plot is based on Dynamic Drive Test results only. 4RJIL VIL Note: Plot is based on Dynamic Drive Test results only. 5b) Dropped Calls - The TSP-wise details of dropped calls in auto-selection mode (5G/ 4G/ 3G/ 2G) are as below: Parameter AIRTEL BSNL RJIL VIL Number of successful Calls Established 221 176 254 148 Number of dropped Calls 9 22 2 24 Locations of Dropped Calls AIRTEL BSNL RJIL VIL Note: Dropped calls locations are shown in red colour and which can be clicked to know the exact location (latitude and longitude) on the maps. 6c) Call Silence Instance - The TSP-wise details of Call silence instance in Auto-selection mode (5G/4G) are as below: Parameter AIRTEL BSNL RJIL VIL Call Established 201 131 244 99 (within service provider network) Number of silences calls for >3 Sec 17 24 20 6 Total number of silence instances for >3 Sec 11 18 9 4 Locations of Call Silence Instance AIRTEL BSNL RJIL VIL Note: Call silence instances are shown in red colour and which can be clicked to know the exact location (latitude and longitude) on the map. 7d) Data Download and Upload throughput: The TSP-wise details of Average Download (DL) and Upload (UL) throughput against declared typical DL/UL Throughput for month, in Auto-selection mode (5G/4G/3G/2G) are as below: (i) Download Throughput AIRTEL BSNL RJIL VIL Parameter Measured in (upto 5G) (upto 4G) (upto 5G) (upto 4G) Typical Download throughput (Mbits/s) 5.28 5.00 15.00 15.00 declared by TSP Average Download Throughput (Mbits/s) 88.67 10.64 46.11 35.19 measured during IDT AIRTEL BSNL Note: Plot is based on Dynamic Drive Test results only. 8RJIL VIL Note: Plot is based on Dynamic Drive Test results only. 9(ii) Upload Throughput RJIL Measured AIRTEL BSNL VIL Parameter (upto 5G) in (upto 5G) (upto 4G) (upto 4G) Typical upload throughput (Mbits/s) 3.13 3.00 7.00 8.00 declared by TSP Average Upload Throughput measured during IDT (Mbits/s) 17.32 3.25 3.83 6.84 AIRTEL BSNL Note: Plot is based on Dynamic Drive Test results only. 10RJIL VIL Note: Plot is based on Dynamic Drive Test results only. 11