Is it possible to find another phone number is on or off.
I think it depends on service provider and in India there is no service provider gives information. In Uruguay it is possible!! and if it is possible so how i can check this in India?
Thanks in advance.
There is no standard for determining if a cell phone is powered on or off. Most of us can tell if a cell phone is powered off when calling a phone by the fact that it goes to voice mail immediately. Usually there is no ring-back when this occurs but it may differ slightly from carrier to carrier. The other issue with using this as a determination is that the user can select to avoid the call which if they are fast enough may give similar results to the caller.
You may be able to make a determination on whether a cell phone is on or off using call progress analysis, but for the fore mentioned reasons it will not be 100% accurate. One way to get call progress analysis is to use Call Control XML (CCXML) with a platform that has good call progress analysis like Voxeo’s Prophecy. If you look at their documentation on CCXML there is a section on outbound dialing that covers call progress analysis. You would look to see if there was no ring-back before the answer to determine if the phone is off.