how to activate 3g and 2g data pack in bsnl

The GPRS plans for 2G and 3G customers of BSNL have been unified and these data vouchers can be activated through sending SMS to 53733.

List of 2g/3g bsnl data plans:
 2G /3G DATA VOUCHERS

  1.    DATA14: Amount: Rs.14, Usage: 100 MB, Validity: 3 Days.
 For activating this plan just type DATA14 and send sms to 53733.
 
 2.    DATA40: Amount: Rs.40, Usage: 200 MB, Validity: 7 Days.
 For activating this plan just type DATA40 and send sms to 53733.
 
  3.    DATA78: Amount: Rs.78, Usage: 500 MB, Validity: 15 Days.
 For activating this plan just type DATA78 and send sms to 53733.
 
  4.    DATA98: Amount: Rs.98, Usage: 700 MB, Validity: 21 Days.
 For activating this plan just type DATA98 and send sms to 53733.
 
  5.    DATA139: Amount: Rs.139, Usage: 1GB, Validity: 30 Days.
 For activating this plan just type DATA139 and send sms to 53733.
 
  6.    DATA252: Amount: Rs.252, Usage: 2GB, Validity: 30 Days.
 For activating this plan just type DATA252 and send sms to 53733.
 
  7.    GPRS561: Amount: Rs.561, Usage: 5GB, Validity: 30 Days.
 For activating this plan just type GPRS561 and send sms to 53733.
 
  8. GPRS1011: Amount: Rs.1011, Usage: 10GB, Validity: 30 Days.
 For activating this plan just type GPRS1011 and send sms to 53733.
 
 For additional usage, 2ps/10kb will be charged.