TRAI Assesses Mobile Network Quality Across in Mumbai LSA.

The Telecom Regulatory Authority of India (TRAI) has released findings of Independent

Drive Test (IDT) conducted across Mumbai 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 across City drive - 204.3 Kms,

Hotspot locations - 7 in Mumbai city during 10th June 2026 to 12th June 2026 in Mumbai LSA.

These tests were conducted under the supervision of the TRAI Regional Office Bengaluru. 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 City drive, Inter-operator calling, Hotspots and Walk tests, as per the legends shown on

the map:-

5. 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).

Information Note to the Press (Press Release No. 099/2026)

TELECOM REGULATORY AUTHORITY OF INDIA

www.trai.gov.in

New Delhi, 20 July 2026

For Immediate Release

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 instance occurred during the calls.

d) Data Servies: Download/ Upload Throughput, Latency, Jitter, Packet Drop Rate

6. The overall mobile network performance in Uttara Kannada District 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 102/54857 for Airtel,

17877/23461 for MTNL, 144/54576 for RJIL and 5/54511 for VIL. Details of the

coverage gaps have been provided in the map Annexed.

b) Dropped Calls - Dropped calls, measured as the number of dropped calls out of the

number of successfully established calls, were 1/490 for Airtel, 28/203 for MTNL 0/489

for RJIL and 1/491 for VIL. Details of the dropped call locations have been provided in

the map Annexed.

c) Call Silence Instance - Call silence instances, measured as the total number of silence

instances observed for > 3 seconds out of the total calls established, were 14/ 481 for

Airtel, Not Available for MTNL, 1/475 for RJIL and 1/479 for VIL. Details of the call

silence instance locations have been provided in the map Annexed.

d) Data Download and Upload Throughput:

i) Data Download performance (Overall): Average download speed was observed

as 93.76 Mbps for Airtel (5G/4G), Not Available for MTNL , 237.81 Mbps for RJIL

(5G/4G) and 70.69 Mbps for VIL (5G/4G/2G). Detail of Download throughput has

been provided in the map Annexed.

ii) Data Upload performance (Overall): Average upload speed was observed as

25.92 Mbps for Airtel (5G/4G), Not Available for MTNL, 40.92 Mbps for RJIL

(5G/4G) and 25.57 Mbps for VIL (5G/4G/2G). Detail of Upload throughput has been

provided in the map Annexed.

Locations of Dropped Calls and Call Silence instances 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) City - The areas covered in the city drive are Bandra Worli Sealink, Mahim, Dadar,

Sion, Antop Hill, Worli, Parel, Sewri, Haji Ali, Mumbai Central, Byculla, Malabar Hill, Girgaon,

Mazgaon and Churchgate etc in Mumbai city.

b) Hotspot - The hot spot locations, capturing stationary user experience, are Byculla

Railway Station, Chhatrapati Shivaji Maharaj Terminus, Churchgate Railway Station, Dadar

Railway Station, Gateway of India, Marine Drive, and Parel Railway Station.

8. 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.bengaluru@trai.gov.in or Regional Office of TRAI at Bengaluru RO can be contacted on

telephone No. +91-80-22865004.

Annexure

1. Mumbai LSA

2. 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 54857 23461 54576 54511

Number of Samples having poor signal strength 102 17877 144 5

Number of Samples having limited service (No

Coverage) 0 7325 0 0

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.

MTNLAIRTEL

RJIL VIL

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 490 203 489 491

Number of dropped Calls 1 28 0 1

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 map.

MTNL

VIL

AIRTEL

c) Call Silence Instance - The TSP-wise details of Call silence instance in Auto-selection

mode (5G/4G) are as below:

Parameter AIRTEL MTNL RJIL VIL

Call Established

(within service provider network) 481 NA* 475 479

Number of silences calls for >3 Sec 14 NA* 1 1

Total number of silence instances for >3

Sec 23 NA* 1 1

* NA – Not Applicable

Locations of Call Silence Instance

Note: Call silence instances are shown in red colour and which can be clicked to know the

exact location (latitude and longitude) on the map.

RJIL

VIL

AIRTEL

d) 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

AIRTEL

(upto

5G)

MTNL

(upto

3G)

RJIL

(upto

5G)

VIL

(upto

5G)

Typical Download

throughput declared by

TSP

(Mbits/s) 7.37 2.86 15.00 15.00

Average Download

Throughput measured

during IDT

(Mbits/s) 93.76 - 237.81 70.69

Note: Plot is based on Dynamic Drive Test results only.

AIRTEL RJIL

VIL

(ii) Upload Throughput

Parameter Measured

AIRTEL

(upto

5G)

MTNL

(upto

3G)

RJIL

(upto

5G)

VIL

(upto

5G)

Typical upload throughput

declared by TSP (Mbits/s) 2.08 0.25 7.00 8.00

Average Upload Throughput

measured during IDT (Mbits/s) 25.92 - 40.92 25.57

Note: Plot is based on Dynamic Drive Test results only.

VIL

AIRTEL RJIL