**Executive Summary**
The Telecom Regulatory Authority of India (TRAI) released the findings of an Independent Drive Test (IDT) conducted in December 2025 for the Tamil Nadu Licensed Service Area, including Trichy City and adjoining areas. The IDT assessed real-world mobile network performance across various environments and technologies. The findings of the IDT have been shared with all concerned Telecom Service Providers (TSPs). The detailed report is available on the TRAI website (www.trai.gov.in).
**Key Points / Main Content**
* **Scope and Methodology:**
* The IDT covered urban zones, institutional hotspots, and rural residential areas.
* Assessments included 371.3 km of drive tests and a 5.1 km walk test, evaluations at seven hotspot locations.
* Technologies assessed: 2G, 3G, 4G, and 5G.
* **Key Parameters Assessed:**
* **Voice Services:** Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Call Setup Time (CST), Call Silence Rate, Speech Quality (MOS), and Coverage.
* **Data Services:** Download and Upload Throughput, Latency, Jitter, Packet Drop Rate, and Video Streaming Delay.
* **Overall Mobile Network Performance in Trichy City:**
* **Call Setup Success Rate:** Airtel and VIL recorded 100.00%, BSNL at 90.51% and RJIL at 97.65%.
* **Call Setup Time:** Airtel at 1.12 seconds, BSNL at 4.66 seconds, RJIL at 0.80 seconds and VIL at 1.63 seconds.
* **Drop Call Rate:** All recorded 0.00% respectively, except for BSNL at 5.87%.
* **Data Download Speeds:** Airtel (5G/4G) averaged 194.70 Mbps, BSNL (4G/3G/2G) 5.46 Mbps, RJIL (5G/4G) 286.39 Mbps, and VIL (4G/2G) 24.85 Mbps.
* **Poor Signal Strength:** Airtel at 6.45%, BSNL at 11.74%, RJIL at 6.07% and VIL at 6.73%.
* Tests were conducted using TRAI's suggested equipment and standardized protocols.
**Impact Analysis**
**Telecom Service Providers (TSPs)**
* **Impact:**
* TSPs are the primary stakeholders, as the report assesses their network performance.
* The findings highlight areas where TSPs excel or need improvement in Trichy.
* **Action Required:**
* TSPs should review the detailed findings.
* TSPs must take corrective measures to address deficiencies in network performance.
**Telecom Regulatory Authority of India (TRAI)**
* **Impact:**
* The report provides TRAI with data to evaluate network performance.
* **Action Required:**
* Monitor and assess the actions taken by TSPs.
* Use the data to inform regulatory decisions.
**Consumers**
* **Impact:**
* Consumers benefit from improved network quality.
* Consumers are informed about the performance of different service providers.
* **Action Required:**
* Consumers can use the information to make informed choices about their service providers.
Key Entities Referenced
Telecom Regulatory Authority of India (TRAI): The regulator that conducted the network quality assessment.
Tamil Nadu: The state where the network quality assessment was conducted.
Trichy City: The city within Tamil Nadu where the network quality assessment was focused.
Airtel: One of the telecom service providers whose network quality was assessed.
BSNL: One of the telecom service providers whose network quality was assessed.
Ministry of Communications
TRAI Assesses Network Quality Across Trichy
City and Adjoining Areas in the State of Tamil
Nadu (Tamil Nadu Licensed Service Area)
प्रव तथ: 22 JAN 2026 12:35PM by PIB Delhi
The Telecom Regulatory Authority of India (TRAI) has released the findings of its Independent Drive Test
(IDT) for the Tamil Nadu Licensed Service Area (LSA), covering Trichy City and adjoining areas,
conducted in December 2025. The drive tests were carried out under the supervision of the TRAI Regional
Office, Hyderabad, to assess real-world mobile network performance across diverse usage environments,
including urban zones, institutional hotspots, and rural residential areas. Between 09 December 2025 and
12 December 2025, TRAI teams conducted detailed assessments covering a total of 371.3 km of drive
tests across Trichy City, along with a 5.1 km walk test and evaluations at seven hotspot locations. The
technologies assessed included 2G, 3G, 4G, and 5G, reflecting the service experience of users across
multiple handset capabilities. The findings of the IDT have been shared with all concerned Telecom
Service Providers (TSPs).
Key Parameters Assessed:
a. Voice Services:
Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Call Setup Time (CST), Call Silence Rate,
Speech Quality (MOS), and Coverage.
The overall mobile network performance in Trichy City is summarized below:
Call Setup Success Rate (Auto-selection mode: 5G/4G/3G/2G):
Airtel, BSNL, RJIL, and VIL recorded CSSR values of 100.00%, 90.51%, 97.65%, and 100.00%,
respectively.
Poor Signal Strength during Voice Testing (Auto-selection mode: 5G/4G/3G/2G):
Observed at 0.39% for Airtel, 10.48% for BSNL, 0.96% for RJIL, and 2.99% for VIL along the city IDT
route.
b. Data Services:
Download and Upload Throughput, Latency, Jitter, Packet Drop Rate, and Video Streaming Delay.
Poor Signal Strength during Data Testing (Auto-selection mode: 5G/4G/3G/2G):
Observed at 6.45% for Airtel, 11.74% for BSNL, 6.07% for RJIL, and 6.73% for VIL along the city IDT
route.
Abbreviations:
CSSR – Call Setup Success Rate (%),CST – Call Setup Time (seconds),
DCR – Drop Call Rate (%),
MOS – Mean Opinion Score.
Summary-Voice services Summary-Data services
Call Setup Success Rate: Airtel, BSNL, RJIL and Data Download performance (Overall): Average
VIL have 100.00%, 90.51%, 97.65% and download speed of Airtel (5G/4G) is 194.70 Mbps,
100.00% call setup success rate respectively in BSNL (4G/3G/2G) is 5.46 Mbps, RJIL (5G/4G) is
Auto-selection mode (5G/4G/3G/2G). 286.39 Mbps and VIL (4G/2G) is 24.85 Mbps.
Call Setup Time: Airtel, BSNL, RJIL & VIL have Data Upload performance (Overall): Average
call setup time of 1.12, 4.66, 0.80 and 1.63 upload speed of Airtel (5G/4G) is 33.36 Mbps,
seconds respectively in Auto-selection mode BSNL (4G/3G/2G) is 6.29 Mbps, RJIL (5G/4G) is
(5G/4G/3G/2G). 28.52 Mbps and VIL (4G/2G) is 11.68 Mbps.
Drop Call Rate: Airtel, BSNL, RJIL and VIL Latency (Overall): Airtel, BSNL, RJIL and VIL
have drop call rate of 0.00%, 5.87%, 0.00% and 50th percentile latency is 43.03 ms, 48.55 ms,
0.00% respectively in Auto-selection mode 25.06 ms, 43.93 ms respectively.
(5G/4G/3G/2G).
Data performance - Hotspots (in Mbps):
Call Silence/Mute Rate: Airtel, BSNL, RJIL and
Airtel- 4G D/L: 31.50 4G U/L: 6.69
VIL have silence call rate 0.26%, 3.48%, 0.78%
and 1.03% respectively in packet switched 5G D/L: 254.33 5G U/L: 31.13
network (4G/5G).
BSNL- 4G D/L: 4.55 4G U/L: 8.49
Mean Opinion Score (MOS): Airtel, BSNL, RJIL
RJIL- 4G D/L: 54.15 4G U/L: 9.49
and VIL have average MOS of 3.99, 3.38, 4.48
5G D/L: 375.03 5G U/L: 26.67
and 4.32 respectively
VIL- 4G D/L: 24.87 4G U/L: 15.58
Poor Signal strength: Airtel, BSNL, RJIL and
VIL have been observed 0.39%, 10.48%, 0.96% Poor Signal strength: Airtel, BSNL, RJIL and VIL
& 2.99% respectively for the route covered in have been observed 6.45%, 11.74%, 6.07% &
auto-selection mode (5G/4G/3G/2G)
6.73% respectively for the route covered in auto-
selection mode (5G/4G/3G/2G)
Note- “D/L” Download speed, “U/L” Upload
speedIn Trichy City, the assessment included the areas nearby Sethurapatti, Manikandam, Mannarpuram, MGR
Nagar, Kulathur, Thuvakudi, Palpannai Junction, Lalgudi Road, Puvalur, Madakudi, Thiruppangali North,
Tiruchirapalli Salem Main Road, Kulithalai, Kulumani and Sannasipatty etc.
Walk test at Trichy Sri Ranganatha Swamy Temple and Trichy Central Railway Station.
TRAI also evaluated real-world conditions at 1. Arulmigu Jambukeswarar Temple 2. District Collector
Office Trichy 3. IIM Trichy Library 4. Mahatma Gandhi Memorial Government Hospital 5. NIT Trichy 6.
Trichy Airport 7.Trichy Central Bus Stand in Trichy City to reflect stationary user experience.
The tests were conducted using TRAI suggested 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 B. Praveen Kumar, Advisor (Regional Office, Hyderabad) TRAI may be
contacted on email: adv.hyderabad@trai.gov.in or at Tel. No. +91-40-23000761.
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