Date: 2026-06-15Category: Press ReleaseState: Union GovernmentCountry: India
TRAI assesses Mobile Network Quality across metro routes under Delhi Metro Rail Corporation, Noida Metro Rail Corporation and National Capital Region Transport Corporation under Delhi LSA
**Executive Summary**
The Telecom Regulatory Authority of India (TRAI) released findings on June 15, 2026, from Independent Drive Tests (IDT) conducted in April 2026 across 490 km of metro routes in the Delhi Licensed Service Area (LSA). The report assesses the real-time voice and data Quality of Service (QoS) provided by Telecom Service Providers (TSPs) across DMRC, NMRC, and NCRTC routes. The findings have been shared with TSPs to encourage service improvements and inform general telecom consumers.
**Key Points / Main Content**
* **Assessment Scope and Methodology**
* Tests were conducted between April 1–4 and on April 14, 2026, covering 15 metro routes including the Blue, Magenta, Pink, Red, Yellow, and Namo Bharat RRTS lines.
* The IDTs captured performance across 2G, 3G, 4G, and 5G networks using SIM cards from all TSPs and advanced test handsets.
* Performance was monitored and analyzed in real-time using specialized software systems to reflect on-ground network quality.
* **Voice Service Performance**
* **Coverage Gaps:** Signal strength was measured against prescribed minimums; MTNL showed the highest number of poor signal samples (20,768), while RJIL showed the lowest (1,297).
* **Dropped Calls:** Airtel recorded the fewest dropped calls (5), followed by RJIL (8) and VIL (10), while MTNL recorded the highest (51).
* **Parameters:** Evaluation included Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Call Setup Time, Call Silence Rate, and Speech Quality (MOS).
* **Data Throughput Results**
* **Download Speeds:** Average 5G download speeds were measured at 141.28 Mbps for RJIL, 81.72 Mbps for Airtel, and 23.94 Mbps for VIL. MTNL’s 4G download speed averaged 4.30 Mbps.
* **Upload Speeds:** Average 5G upload speeds were 25.98 Mbps for Airtel, 19.99 Mbps for RJIL, and 16.96 Mbps for VIL. MTNL’s 4G upload speed was 1.84 Mbps.
* **Additional Metrics:** The assessment also monitored Latency, Jitter, and Packet Drop Rate.
**Impact Analysis**
**Telecom Service Providers (Airtel, MTNL, RJIL, VIL)**
**Impact**
TSPs are held publicly accountable for their network performance, with specific coverage gaps and call drop locations identified across major transit routes. The report highlights discrepancies between declared typical speeds and actual measured speeds.
**Action Required**
TSPs must review the shared IDT findings and take "further necessary action" to address network deficiencies and improve service quality in the identified areas.
**General Telecom Consumers**
**Impact**
Consumers gain access to objective, comparative data regarding the real-world performance of various mobile networks across the Delhi metro system.
**Action Required**
No mandatory action is required; however, consumers are encouraged to use the published findings to inform their choice of service provider.
**Telecom Regulatory Authority of India (TRAI)**
**Impact**
The authority fulfills its role in monitoring QoS and ensuring transparency in the telecommunications sector.
**Action Required**
TRAI must continue to supervise drive tests through its Regional Office and provide public access to detailed reports via its website for ongoing consumer awareness.
Key Entities Referenced
Delhi LSA: The specific Licensed Service Area covering the Delhi-NCR region where the network quality tests were conducted.
Telecom Regulatory Authority of India (TRAI): The primary regulatory body that conducted the assessment of mobile network quality across various metro routes.
Independent Drive Test (IDT): The assessment initiative used to capture and verify real-time Quality of Service (QoS) parameters of mobile networks.
Delhi Metro Rail Corporation, Noida Metro Rail Corporation, and National Capital Region Transport Corporation: The transport infrastructure entities whose metro and rail routes were the primary focus of the network quality assessment.
Telecom Service Providers (TSPs): The entities, including Airtel, MTNL, RJIL, and VIL, whose 2G, 3G, 4G, and 5G network performance was evaluated.
Ministry of Communications
TRAI assesses Mobile Network Quality across
metro routes under Delhi Metro Rail Corporation,
Noida Metro Rail Corporation and National
Capital Region Transport Corporation under
Delhi LSA
प्रव तथ: 15 JUN 2026 2:52PM by PIB Delhi
TRAI Assessed 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 Yamuna 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 of Apr 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.
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.
TRAI, through its appointed agency, conducted drive tests across 490 Km of metro routes during 01st 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.
Drive Test Route Map: The following map provides overview of drive test routes indicating metro routes,
as per the legends shown on the map: -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
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.
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)
5. 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. Mayur Vihar-1 to Maujpur-Babarpur (Pink Line)
10. Shiv Vihar to Mayur Vihar-1 (Pink Line Ext.)
11. Sector 55-56 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)
The findings of this IDT report 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 information, 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.
Annexure
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 1490Number 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 observedNote: 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 10Locations of Dropped CallsNote: 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.
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:
d. Download Throughput
Parameter Measured AIRTEL MTNL RJIL VIL
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 (Mbits/s) 81.72 4.30 141.28 23.94
measured during IDTNote: Plot is based on Dynamic Drive Test results only.
ii. Upload Throughput
Parameter Measured AIRTEL MTNL RJIL VIL
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 IDTNote: Plot is based on Dynamic Drive Test results only.
***
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