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Information Note to the Press (Press Release No. /2026)
TELECOM REGULATORY AUTHORITY OF INDIA
www.trai.gov.in
New Delhi, 1 S Jun 2026
For Immediate Release
TRAI Assesses Mobile Network Quality Across metro routes in Sector-51 Noida to
Depot Station (Aqua Line), Dwarka Sector-21 to Noida Electronic City (Blue Line 1),
Vaishali to Yarnuna Bank (Blue Line 2), Kirti Nagar to Brigadier Hoshiyar Singh (Green
Line), Dwarka to Dhansa Bus Stand (Grey Line), Botanical Garden to Krishna Park
Extension (Magenta Line), Deepali Chowk to Majlis Park (Magenta Line Ext.), New
Delhi to Yashobhoomi Dwarka Sector-25 (Orange Line), Mayur Vihar-1 to Maujpur
Babarpur (Pink LinE), Shiv Vihar to Mayur Vihar-1 (Pink Line Ext.), Sector 55-56 to
Phase-3 (Rapid Metro), Shaheed Sthal to Rithala (Red Line), Raja Nahar Singh
(Ballabhgarh) to Kashmere Gate (Violet Line), Samaypur Badli to Millennium City
Centre (Yellow Line) & Delhi to Meerut (Namo Bharat RRTS) etc.
The Telecom Regulatory Authority of India (TRAI) has released findings of
Independent Drive Test (IDT) conducted across metro routes under Delhi Metro Rail
Corporation, Noida Metro Rail Corporation and National Capital Region Transport
Corporation under Delhi LSA, during the month ofApr 2026, for information of general
telecom consumers. The purpose ofthis 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 ofTSPs 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 490 Km of
metro routes during 01 st to 04th Apr 2026 & 14th Apr 2026 in Delhi LSA. These tests
were conducted under the supervision of the TRAI Regional Office Delhi. 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.
14. Drive Test Route Map: The following map provides overview of drive test
routes indicating metro routes, as per the legends shown on the map: -
25. 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 instances occurred during the
calls.
d) Data Servies: Download/ Upload Throughput, Latency, Jitter, Packet Drop
Rate
6. The overall mobile network performance in metro routes for the key parameters
has been summarised below: -
a) Coverage Gap - The signal strength observed during voice testing on the 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
1280/ 52666 for Airtel, 20768/ 43220 for MTNL, 1297/ 52325 for RJIL and
1490/ 52753 for VIL. Details of the coverage gaps have been provided in the
map Annexed.
b) Dropped Calls - Dropped calls in auto-selection mode (5G/ 4G/ 3G/ 2G),
measured as the number of dropped calls out of the number of successfully
established calls, were 5/ 491 for Airtel, 51/ 346 for MTNL, 8/ 487 for RJIL
and 10/ 490 for VIL. Details of the dropped call locations have been provided
in the map Annexed.
c) Data Download and Upload Throughput:
i) Data Download performance (Overall): Average download speed was
observed as 81.72 Mbps for Airtel (5G), 4.30 Mbps for MTNL (4G), 141.28
Mbps for RJIL (5G) and 23.94 Mbps for VIL (5G). Detail of Download
throughput has been provided in the map Annexed.
ii) Data Upload performance (Overall): Average upload speed was observed
as 25.98 Mbps for Airtel (5G), 1.84 Mbps for MTNL (4G), 19.99 Mbps for
RJIL (5G) and 16.96 Mbps for VIL (5G). Detail of Upload throughput has
been provided in the map Annexed.
Locations of Dropped Calls 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) Metro Routes:
1. Sector-51 Noida to Depot Station (Aqua Line)
2. Dwarka Sector-21 to Noida Electronic City (Blue Line 1)
3. Vaishali to Yamuna Bank (Blue Line 2)
4. Kirti Nagar to Brigadier Hoshiyar Singh (Green Line)
35. Dwarka to Dhansa Bus Stand (Grey Line)
6. Botanical Garden to Krishna Park Extension (Magenta Line)
7. Deepali Chowk to Majlis Park (Magenta Line Ext.)
8. New Delhi to Yashobhoomi Dwarka Sector-25 (Orange Line)
9. MayurVihar-1 to Maujpur-Babarpur (Pink Line)
10. Shiv Vihar to Mayur Vihar-1 (Pink Line Ext.)
11. Sector 5 5-5 6 to Phase-3 (Rapid Metro)
12. Shaheed Sthal to Rithala (Red Line)
13. Raja Nahar Singh (Ballabhgarh) to Kashmere Gate (Violet Line)
14. Samaypur Badli to Millennium City Centre (Yellow Line)
15. Delhi to Meerut (Namo Bharat RRTS)
8. The findings ofthis IDT rep01t have been shared with respective TSPs for taking
further necessary action at their end. Detailed reports of IDT are made available on the
TRAI website at www.trai.gov.in. For any clarification or additional infonnation, an
email can be sent to adv.ca@trai.gov or Regional Office of TRAI at Delhi RO can be
contacted on telephone no. +91-11-20907772.
~~
(Vivek Khare)
Advisor, RO Delhi, TRAI
4Annexure
Delhi Metro Rail Corporation, Noida Metro Rail Corporation and National Capital Region
Transport Corporation routes:
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 MTNL RJIL VIL
Total Number of Samples captured on Drive test route 52666 43220 52325 52753
Number of Samples having poor signal strength 1280 20768 1297 1490
Number of Samples having limited service 334 3039 595 294
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
AIRTEL
1MTNL
RJIL
2VIL
Note: Plot is based on Dynamic Drive Test results only.
b) Dropped Calls - The TSP-wise details of dropped calls in auto-selection mode (5G/ 4G/ 3G/ 2G)
are as below:
Parameter AIRTEL MTNL RJIL VIL
Number of successful Calls Established 491 346 487 490
Number of dropped Calls 5 51 8 10
3Locations of Dropped Calls
AIRTEL
MTNL
4RJIL
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 map.
Note: - Airtel – 1, MTNL – 1, RJIL – 2, and VIL – 2 drop calls were not plotted on the map, as these
call drops were observed during the underground metro route.
5c) 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
Measured AIRTEL MTNL RJIL VIL
Parameter
in (upto 5G) (upto 4G) (upto 5G) (upto 5G)
Typical Download throughput
(Mbits/s) 37.72 8.00 15.00 15.00
declared by TSP
Average Download
Throughput measured during (Mbits/s) 81.72 4.30 141.28 23.94
IDT
AIRTEL
6MTNL
RJIL
7VIL
Note: Plot is based on Dynamic Drive Test results only.
(ii) Upload Throughput
Measured AIRTEL MTNL RJIL VIL
Parameter
in (upto 5G) (upto 4G) (upto 5G) (upto 5G)
Typical upload throughput
(Mbits/s) 7.71 1.00 7.00 8.00
declared by TSP
Average Upload Throughput
(Mbits/s) 25.98 1.84 19.99 16.96
measured during IDT
8AIRTEL
MTNL
9RJIL
VIL
Note: Plot is based on Dynamic Drive Test results only.
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