METHODS AND SYSTEMS OF PROCESSING MOBILE CALLS

1 . A method of selectively setting up a call at a server, comprising:

receiving, by a callee gateway, a call from a mobile device associated with a caller, wherein the call is transmitted over a network via a caller gateway;

identifying a geographic and/or network origin of the call;

determining whether to accept or reject the call based on the geographic and/or network origin;

if the call is accepted, processing the call; and

if the call is rejected, alerting the caller that the call cannot be completed.

2 . The method of claim 1 , wherein identifying a geographic and/or network origin of the call comprises:

creating a first communication channel to bridge the call;

creating a second communications channel that communicates with a plurality of servers; and

transmitting an HTTP request to one or more of the plurality of servers, wherein the HTTP request comprises an indication of the origin of the call.

3 . The method of claim 1 , wherein identifying a geographic and/or network origin of the call comprises:

decoding one or more DTMF tones that have been encoded to represent the geographic and/or network origin of the call.

4 . The method of claim 1 , wherein identifying a geographic and/or network origin of the call comprises:

receiving information associated with the geographic and/or network origin via a data channel.

5 . The method of claim 1 , wherein the caller gateway and the callee gateway are located in different countries.

6 . A callee gateway configured to set-up a call, comprising:

means for receiving a call from a mobile device associated with a caller, wherein the call is transmitted over a network via a caller gateway;

means for identifying a geographic and/or network origin of the call;

means for determining whether to accept or reject the call based on the geographic and/or network origin;

means for processing the call if the call is accepted; and

means for alerting the caller that the call cannot be completed if the call is rejected.

7 . A method of ascertaining information associated with a callee, the method comprising:

receiving a direct inward dialing number associated with a callee;

comparing the direct inward dialing number to one or more entries in a consolidated general registry, wherein each entry comprises contact information; and

if an entry having the direct dialing number is found, transmitting at least a portion of the contact information to the caller.

8 . The method of claim 7 , wherein the contact information comprises one or more of a telephone number, a screen name and an email address.

9 . The method of claim 7 , further comprising:

automatically connecting the call using one or more predetermined rules.

10 . The method of claim 7 , wherein transmitting at least a portion of the contact information to the caller comprises:

downloading a portion of the contact information in one or more stages such that image quality associated with the downloaded portion in each stages progressively improves.

11 . (canceled)

12 . A method of filtering one or more contacts in an address book on a mobile device, the method comprising:

identifying one or more contacts in an address book associated with a mobile device;

automatically filtering the one or more contacts in real time based on one or more predetermined criteria, wherein each predetermined criterion corresponds to a tab; and

displaying the filtered contacts to the user on a mobile device, wherein the tab corresponding to each predetermined criterion includes the contacts associated with the predetermined criterion.

13 . The method of claim 12 , wherein automatically filtering the one or more contacts comprises filtering the one or more contacts based on one or more of the following:

whether a contact has a landline telephone number;

whether a contact has a wireless telephone number;

whether a contact belongs to the same carrier as the mobile device user;

whether a contact has recently called the mobile device user; and

whether the mobile device user has recently called a contact.

14 . The method of claim 4 , wherein the data channel corresponds to an out-of-band data channel with respect to a channel upon which the call is received at the callee gateway.

15 . The method of claim 14 , wherein the data channel corresponds to a non-audio channel and the channel upon which the call is received at the callee gateway corresponds to an audio channel.