In the wireless internet market, two of the most popular brands are of Reliance and Tata. (reliance being pretty bad in the starting stage)
I tried both the USB modems, but, i'm only satisfied with tata's Photon+.
No doubt, Reliance's Broadband + was launched earlier than the Photon, but still Reliance is the worst. When i used the reliance, it semmed good in the beginning, but after a while, it started behaving very badly. It used to switch on from the HSIA to 1x, at any time, and then shift from 1x to HSIA, causing a lot of connection
breaks. Also, there was a lot of billing mistakes, when i bought the broadband +, it was bundeled with free usage of 1 month, as per the plan taken. But, after the 1st month, the bill shocked me fully. It was for Rs. 5882. Whereas, the credit limit was only set at Rs.2500. On enquiring, reliance was having no answers to it. they only asked to pay the amount. But, the amount was never paid. And i shifted to photon +.

Photon + was launched late than the Broadband +, but they launched it after  a good amount of surveys and network tests themselves, to ensure better connectivity after it is launched.
Photon never showed any signs of problems or network issues (Signal Strength always remains an issue with reliance, even on 1x, its towers can stop working anytime). Even, the speed is quite good (even faster than the Broadband+).
The only thing that makes support to reliance is its rural base. Tata doesn't have much connectivity in rural areas, whereas reliance mostly covers every rural area.
I don't know whether Reliance has made some improvements or not, But the beginning was so bad, that many users stopped using it. 
Here are some of Photon's speed test results:
1. Speedtest.net

2. Airtel Broadband Speed-test

3. PC world Australia Speed -Test







Glossary of Terms

56K Modem
A modem is a device that converts digital signals, from a computer, into analog signals for transmission over telephone lines. A modem also converts incoming analog signals into digital signals. 56K means that this type of modem has the ability to transmit at up to 56,600 bps.
ADSL
ADSL is a type of high-speed Internet access for consumers. ADSL stands for Asymmetric Digital Subscriber Line. This is a technology that allows for digital transmission over existing telephone lines. The term 'asymmetric' refers to the fact that the speed that you send data can be different than the speed that you can receive data. Therefore, a typical user will have a faster download speed than upload speed through ADSL. ADSL service is typically many times faster than a 56k modem while allowing for regular phone/voice usage simultaneously on the same telephone line. ADSL service is an "always-on" type of connection, which is especially vulnerable to hacker attacks. Users can prevent unauthorized access with a software firewall product.
Bandwidth
Bandwidth refers to how much data is transmitted over a given period of time. For digital devices, bandwidth is measured in bits per second (bps). For analog devices, bandwidth is measured in Hertz (Hz).
bps
bps stands for 'bits per second'. bps is the standard measure of data speed or data transmission. This is measured by how many bits of data are transmitted or received over a one second period.
Broadband
This term is loosely used to describe high-speed Internet access.
Cable Modem
Cable modem service is a type of high-speed Internet access offered by local cable companies for consumers. Using the same coaxial cable used for TV signals, the speed of downloading data is typically many times faster than a 56K modem. Since cable TV was designed as a broadcast system, the cable is shared amongst many people in a small area, so download speeds can vary greatly throughout the day or week. Typically, upload speed is restricted to only 56Kbps, more than enough for normal, fast "surfing" of the Internet. Cable modem service is an "always-on" type of connection, which is especially vulnerable to hacker attacks. Users can prevent unauthorized access with a software firewall product.
Download
From an Internet user's point of view, to download a file is to receive it from another computer. In typical "surfing" of the Internet, the amount of data downloaded is many times greater than the amount of data uploaded.
DSL
DSL is a type of high-speed Internet access for consumers. DSL stands for Digital Subscriber Line. This is a technology that allows for digital transmission over existing telephone lines. DSL service is typically many times faster than a 56K modem while allowing for regular phone/voice usage simultaneously on the same telephone line. Although DSL service does not exist in all areas, it is currently more available than cable modem service. DSL service is an "always-on" type of connection, which is especially vulnerable to hacker attacks. Users can prevent unauthorized access with a software firewall product.
ISDN
ISDN is a type of high-speed Internet access typically for businesses. ISDN stands for Integrated Services Digital Network. ISDN is conceptually the integration of both analog or voice data together with digital data over the same network
ISP
An ISP, or Internet Service Provider, is a company that provides users access to the Internet.
Kbps
Kbps stands for kilobit per second (thousands of bits per second, or bps) and is a common measure of bandwidth.
LAN
A local area network, or LAN, is a group of computers and/or devices that share a common communications line within a small geographic area such as within an office building. A typical LAN can provide extremely high-speed Internet access with just one high-bandwidth connection to an ISP.
Mbps
Mbps represents millions of bits per second and is a measure of bandwidth on a medium such as a telephone line, cable line, or optical fiber. Depending on the medium and the transmission method, bandwidth may also be in the Kbps range or the Gbps (billions of bits or gigabits per second) range.
Upload
From an Internet user's point of view, to upload a file is to send it to another computer. In typical "surfing" of the Internet, the amount of data downloaded is many times greater than the amount of data uploaded.

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