TRAI Assesses Network Quality Across Mumbai

Information Note to the Press (Press Release No. ___/2026) TELECOM REGULATORY AUTHORITY OF INDIA www.trai.gov.in New Delhi, ____ March 2026 For Immediate Release TRAI Assesses Network Quality Across Mumbai The Telecom Regulatory Authority of India (TRAI) released its Independent Drive Test (IDT) findings for the Mumbai, Mumbai Licensed Service Area (LSA), covering extensive City/Railway/Coastal routes during the month of January 2026. The drive tests, conducted under the supervision of the TRAI Regional Office, Bengaluru, were designed to capture real-world mobile network performance across diverse usage environments – Urban Zones, Institutional Hotspots, Public Transport Hubs, and high-speed Corridors. Between 20th January 2026 to 23rd January 2026, TRAI teams conducted detailed tests across 214.8 Kms of Mumbai including 201.7 Kms of City drive, 7 Hot spots, 3.7 Kms Walk Test and Coastal drive of 9.4 Km. Technologies evaluated included 2G, 3G, 4G, and 5G, reflecting the service experience of users across multiple handset capabilities. The findings of IDT have been intimated to all the TSPs concerned for further necessary action. Key Parameters Assessed: a) Voice Services: Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Call Setup Time, Call Silence Rate, Speech Quality (MOS), Coverage. b) Data Services: Download/Upload Throughput, Latency, Jitter, Packet Drop Rate, and Video Streaming Delay. Call Setup Success Rate - Airtel, MTNL, RJIL and VIL have 100.00%, 20.77%, 100.00% and 100.00%, call setup success rate respectively in Auto-selection mode (5G/4G/3G/2G). Drop Call Rate - Airtel, MTNL, RJIL and VIL have drop call rate of 0.00%, 45.34%, 0.63% and 0.00% respectively in Auto-selection mode (5G/4G/3G/2G).. • The poor Signal Strength in auto-selection mode (5G/4G/3G/2G) during voice testing has been observed in 0.32%, 71.31%, 0.22% & 0.33% of the City IDT route in case of Airtel, MTNL, RJIL & VIL respectively. • The poor Signal Strength in auto-selection mode (5G/4G/3G/2G) during data testing has been observed in 2.00%, 71.43%, 1.84% & 1.26% of the City IDT route in case of Airtel, MTNL, RJIL & VIL respectively. • The poor Signal Strength in auto-selection mode (5G/4G/3G/2G) during voice testing has been observed in 0.44%, 89.39%, 0.46% & 0.00% of the Coastal IDT route in case of Airtel, MTNL, RJIL & VIL respectively. • The poor Signal Strength in auto-selection mode (5G/4G/3G/2G) during data testing has been observed in 2.00%, 96.71%, 2.34% & 0.80% of the Coastal IDT route in case of Airtel, MTNL, RJIL & VIL respectively. Page 1 of 3Summary of Performance against key QoS parameters CSSR: Call Setup Success Rate i.e. (in %), CST: Call Setup Time (in seconds), DCR: Drop Call Rate (in %) & MOS: Mean Opinion Score representing typical voice quality. Summary-Voice services Summary-Data services Data Download performance (Overall): Average Call Setup Success Rate: Airtel, MTNL, RJIL and VIL download speed of Airtel (5G/4G) is 84.34 Mbps, have 100.00%, 20.77%, 100.00% and 100.00%, call MTNL (3G/2G) is 3.54 Mbps, RJIL (5G/4G) is setup success rate respectively in Auto-selection mode 244.43 Mbps and VIL (5G/4G) is 40.00 Mbps. (5G/4G/3G/2G). Data Upload performance (Overall): Average Call Setup Time: Airtel, MTNL, RJIL & VIL have call upload speed of Airtel (5G/4G) is 27.32 Mbps, setup time of 1.31, 3.99, 0.57 and 0.41 seconds MTNL (3G/2G) is 0.58 Mbps, RJIL (5G/4G) is respectively in Auto-selection mode (5G/4G/3G/2G). 39.05 Mbps and VIL (5G/4G) is 13.40 Mbps. Drop Call Rate: Airtel, MTNL, RJIL and VIL have drop Latency (Overall): Airtel, MTNL, RJIL and VIL call rate of 0.00%, 45.34%, 0.63% and 0.00% 50th percentile latency is 29.87 ms, 57.27 ms, respectively in Auto-selection mode (5G/4G/3G/2G). 16.04 ms, 18.06 ms respectively. Call Silence/Mute Rate: Airtel, RJIL and VIL have Data performance - Hotspots (in Mbps): silence call rate of 1.77%, 0.30% and 1.19% respectively Airtel- 4G D/L: 40.41 4G U/L: 6.22 in packet switched network (4G/5G). 5G D/L: 124.48 5G U/L: 33.25 RJIL- 4G D/L: 38.04 4G U/L: 10.31 5G D/L: 179.78 5G U/L: 22.67 Mean Opinion Score (MOS): Airtel, MTNL, RJIL and VIL have average MOS of 3.89, 2.03, 4.51 and 4.47 VIL- 4G D/L: 31.13 4G U/L:8.70 5G D/L: 39.28 5G U/L: 12.84 respectively. Note- “D/L” Download speed, “U/L” Upload speed 4G & 5G technology have not been observed in MTNL In Mumbai, the assessment included high-density neighbourhoods like Retibunder, Mumbra, Kaleskar, Dahisar Mori, Navde, Taloja, Devichpada, Ustane, Taloja Bypass Phata, Bhavdevi Nagar, Shil Phata Khadi, Mahape, Kopar Khairane, Vashi Plaza, Bahnani Chowk, Turbhe MIDC, MIDC Industrial Area, Ghansoli, TTC Industrial Area, Rabale, Airoli, Digha Gaon, Kalwa West and Vastu Anand etc. TRAI also evaluated real-world conditions at Airoli Police Station, Kalva Tehsildar Office, Millennium Business Park (MBP), Mumbra Municipal Hospital, NMMC Ward Office Kopar Khairane, Pawane MIDC Industrial Area, and Rabale MIDC TTC Industrial Area (Main Gate). The walk tests, conducted on 21st January 2026 focused on Airoli Railway Station, Kopar Khairane Railway Station, and Rabale Railway Station capturing mobile network behaviour in crowded pedestrian environments. Page 2 of 3The Coastal drive test route covered Atal Setu and Belapur Jetty to understand quality of service along the route. The tests were conducted using TRAI-calibrated equipment and standardised protocols in real-time environments. The detailed report is available at TRAI website www.trai.gov.in. For any clarification/information, Shri Brajendra Kumar, Advisor (Regional Office, Bengaluru) TRAI may be contacted on email: adv.bengaluru@trai.gov.in or at Tel. No. +91-80-22865004. (Brajendra Kumar) Advisor, TRAI RO Bengaluru Page 3 of 3