Primary sources · Press release
TRAI Assesses Mobile Network Quality along river Ganga from Kolkata to Kachubaria-Gangasagar under West Bengal LSA.
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Information Note to the Press (Press Release No. 102 / 2026)
TELECOM REGULATORY AUTHORITY OF INDIA
www.trai.gov.in
New Delhi, 23 July 2026
For Immediate Release
TRAI Assesses Mobile Network Quality along river Ganga from Kolkata to Kachubaria-Gangasagar under
West Bengal LSA.
The Telecom Regulatory Authority of India (TRAI) has released findings of Independent Drive Test
(IDT) conducted along river Ganga from Kolkata to Kachubaria-Gangasagar under West Bengal LSA, during
the month of June 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 along river Ganga (Coastal) – 124.4 KMs,
Hotspot locations - 2 in West Bengal State on 6th June 2026 in West Bengal 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 Coastal
drive and Hotspots, as per the legends shown on the map: -
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Annexure
1. Coastal drive along river Ganga from Kolkata to Kachubaria-Gangasagar
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 18186 16338 18149 18122
Number of Samples having poor signal strength 1051 10326 1474 1819
Number of Samples having Limited Service (No
Coverage) 0 623 0 5
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
Note: Plot is based on Dynamic Drive Test results only.
VIL
AIRTEL BSNL
RJIL
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b) 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 129 124 130 133
Number of dropped Calls 1 24 2 9
Locations of Dropped Calls
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.
AIRTEL BSNL
RJIL VIL
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c) 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
Parameter Measured
in
AIRTEL
(upto 5G)
BSNL
(upto 4G)
RJIL
(upto 5G) VIL
(upto 5G)
Typical Download
throughput declared by TSP (Mbits/s) 5.04 5.00 15.00 15.00
Average Download
Throughput measured during
IDT
(Mbits/s) 55.93 5.95 86.53 24.23
Note: Plot is based on Dynamic Drive Test results only.
VILRJIL
BSNLAIRTEL
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(ii) Upload Throughput
Parameter Measured
in
AIRTEL
(upto 5G)
BSNL
(upto 4G)
RJIL
(upto 5G) VIL
(upto 5G)
Typical upload throughput
declared by TSP (Mbits/s) 3.77 3.00 7.00 8.00
Average Upload Throughput
measured during IDT (Mbits/s) 5.54 1.65 4.95 3.43
Note: Plot is based on Dynamic Drive Test results only.
BSNL
RJIL VIL
AIRTEL