Some questions about wireless broadband and 3G

Please pick one topic:
Bharat Sanchar Nigam Ltd.
All finally lead to the "Ocean" Internet! WWW.
( communications)
The method you select is different !

2(a). Mention your present system(laptop desktop) details
./Location/
(b) cellphone/smart phone used
(c) Service provider
to answer specifically for your requirement.
Feedback.

Pls tell me this:

1. What is the difference between wireless broadband and 3G USB data cards?

2. What is the difference between BSNL's EVDO card and 3G Data card?

3. Is Reliance Netconnect a wirelss broadband service or its a 3G USB Data card system?

4. If I don't want to use Reliance's mobile connection in my cellphone, can I still use Reliance Netconnect?

5. Similarly, if I don't want to use BSNL's mobile connection in my cellphone, can I still use BSNL's 3G data card or EVDO Card?

I am using desktop computer with Windows 7 as OS. My current internet service povider is BSNL's wired broadband. My cellphone is Nokia N73. My cellphone network service provider is BSNL prepaid (Excel Anant New plan). My SIM is 3G enabled.

Waiting eagerly for an answer.