To Activate Mobile Number Portability (Switching from one network to another network) all you need to do is SMS "Port" to 1900(toll free).Then your network provider will reply you a unique porting number via sms just note it down and put the unique porting number in new network operators form. Service charge will be Rs=19.00 Overall Service to Activate = 48 Hours Duration Number Switched Off= 1 Hour In future if you want to switch from current network to another network then you have to wait for at least 3Months(90 Days)...