Virgin vFlash USB Modem offers 3.1 Mbps Broadband speed, national coverage, 8 GB storage and attractive Tariff Plans.
Virgin vFlash USB Modem Features:

Stylish swivel design, easy to plug an play
Built-in 8 GB data space
Zero Data Plan Rental for the first 30 days
Watch 40 channels with vFlash TV
No rental on vFlash TV [...]

MTS Pay Per Second Plan

Starter Kit with Life Time Validity: Rs. 49/- Indian Rupee (INR)
Talktime: Nil
Local Calls @ 1 paise/second
STD Calls @ 1 paise/second for first 10,000 seconds after that 2 Paise/sec
SMS Charges:
Local: 50 Paise
National: 1 Rupee
International: 5/- Rupees
Roaming charges: Incoming 1 Rupee/Minute and Outgoing 1.50 [...]

Aircel Pay Per Second Plan:

Starter Kit with Life Time Validity: Rs. 49/- Indian Rupee (INR)
Talktime: Nil
Local Calls @ 1 paise/second
STD Calls @ 1 paise/second for first 10,000 seconds after that 2 Paise/sec
International and SMS Charges as per prepaid plan
Roaming charges as per plan

Existing subscribers can get this Pay Per [...]

Idea Pay Per Second Plan Details:

Recharge with 49 Rupees Voucher
Validity: Lifetime
Talktime: Rs. 5/-
Local Calls @ 1 paise/second
STD Calls @ 1 paise/second
SMS Charges:
Local: 40 Paise
National: 60 Paise
International: 5/- Rupees
Roaming charges for Incoming and Outgoing Calls at 1 Paise per second

Idea Pay Per Second Terms & Conditions:

[...]

Tata Docomo Pay Per Second Plan Details:

One Time Recharge: Rs. 49/- Indian Rupee (INR)
Validity: Lifetime
Talktime: Rs. 5/-
Local Call Rates @ 1 paise/second
STD call rates @ 1 paise/second to any netwok
SMS Rates:
Local: 60 Paise
National: 1.20 Rupee
International: 5/-
In Roaming Incoming and Outgoing @ 1 Paisa/sec

Tata Docomo Pay [...]

BSNL launched pay per second postpaid plan (Plan225) for its subscribers.
“Per second billing will be an advantage for customers. BSNL has introduced per second pulse in postpaid plan 225. ISD calls are now available on per second pulse making it more affordable and attractive,” BSNL CMD Kuldeep Goyal said.

BSNL Plan225 Postpaid pay per second [...]

BSNL Pay Per Second Plan Details:

Pay per second Voucher Price: Rs. 45/- Indian Rupee (INR) except West Zone**
Valid for 365 Days
Talktime: 0
Call Rates
BSNL to BSNL: Local and STD at 1 Paise/Second
to other Networks: Local and STD calls at 1.20 Paise/Second
SMS and ISD rates as per Normal Prepaid Plan

** [...]

Airtel Pay Per Second Freedom Tariff plan is now available all over India for all existing and new subscribers. To activate pay per second plan you will need special tariff vouchers which are different for different circles.
Airtel Freedom Plan: Pay Per Second call Rates

All Airtel to Airtel local and STD calls at – 1 [...]

MTNL 3G Pay Per Second Postpaid Tariff Plan for Delhi and Mumbai

Activation charge – Rs. 500/- Indian Rupee (INR) + Taxes
Monthly fixed charges: Rs.149/-

Talktime and SMS Charges under 3G Postpaid pay per second Plan

MTNL to MTNL: Local and STD call rates at 0.5 Paise/Sec
Other Networks: Local and STD @ 1 Paise/Sec
[...]

MTNL 3G Prepaid Pay Per Second Tariff Plan for Delhi and Mumbai

3G Jadoo Pay per second SIM Price: Rs. 100/- Indian Rupee (INR)
Validity: 0
Talk Time: 0
No Free Data Usage

Talktime and SMS Charges under 3G pay per second Plan

MTNL to MTNL: Local and STD call rates at 0.5 Paise/Sec
Other Networks: [...]