I guess that would be a two-step process for you.
First, convert Airtel 2G to BSNL 2G. Then, convert BSNL 2G to BSNL 3G.
Steps:
[*]Send an SMS to 1900 in following format: PORT Your Mobile Number- eg. PORT 9999999999. (Simply sms “PORT to 1900.)
[*]You will get a 8 digit unique porting code (UPC) instantly as a SMS.
[*]Send this SMS to operator you want to migrate to quoting the unique code. This code is valid only for a few days, and have to be applied again if it expires.
[*]Your new operator will check with your existing operator & if there are no dues then approval will be given for porting.
[*]You will get a SMS with the time and date when porting will take place. Rules mandate that process be completed within 7 days of applying.
[*]After porting is complete, wait for the SMS from your new operator confirming the switch. Your phone may be dead for few hours when the porting takes place.
[/list]
You need to submit:
[*]Duly filled CAF form with UPC code details
[*]Copy of valid Address and Identity proof
[*]Copy of last bill paid to current service provider (in case of postpay customer)
[/list]
Nice explanation. thanks