How to get 3G activated on my BSNL prepaid sim?

I want to use 3G connection to use internet on my cellphone. I already have a BSNL prepaid sim. How to get my 3G service activated? Wat are the monthly plans available?How to get 3G activated on my BSNL prepaid sim?
if you already have a 2G sim and if you wish to migrate to 3g , you have to send

M3G120 to 53733.

3G serivce will activated in few mintues.

After 3G is activated , your default internet plan will be 2 paise for 10 KB ( i.e. rs 2 for 1 MB)

Monthly Data plans

1) 100 rs ( 250 MB for 30 days)

2) 200 rs ( 500 MB for 30 days)

3) 400 rs ( 1GB for 30 days )

4) 606 rs ( total 6GB for 30 days ,1GB day, 5GB night )

5) 716 rs ( 2GB for 30 days )

6) 1102 rs ( 10GB for 30 days)

7) 1500 rs ( 15GB for 30 days)

8) 2000 rs ( 22GB for 30 days)

9) 3000 rs ( 35 GB for 30 days)

Note : Price may vary from Circle to Circle by Rs.3(+/-) considering local market conditions etc.
This rules only applies for only 4 data plans, i.e. 100, 200, 400, 2000 .

For andhra pradesh circle it's + 3 so 103 , 203, 403, 2003, check whether it's +3 or -3 at your circle.How to get 3G activated on my BSNL prepaid sim?
You should call BSNL customer service to activate the 3G internet service for you %26amp; to buy a data plan :-) Good Luck!