Presence-based device mode modification

1. A method to change a mode of operation of a first device associated with a first user, the method comprising:

receiving, by the first device associated with the first user, information that indicates a presence of a second user, wherein the information that indicates the presence of the second user is based on visually determining the presence of the second user, and wherein the visually determining includes:

capturing visual information by one or more cameras; and

comparing the captured visual information with stored visual data;

determining, by the first device associated with the first user and based at least on the received information, whether the second user is present within a particular range of distance from the first device;

identifying, by the first device associated with the first user and based at least on a determination that the second user is present within the particular range of distance from the first device, a triggering event that requires a change in the mode of operation of the first device from a first mode of operation to a second mode of operation; and

changing, by the first device associated with the first user and based at least on the identified triggering event, the mode of operation of the first device from the first mode of operation to the second mode of operation.

2. The method of claim 1 , wherein the determination that the second user is present within the particular range of distance from the first device is based on one or more signals generated from a second device associated with the second user.

3. The method of claim 2 , wherein the one or more signals generated from the second device include one or more signals generated from the second device and sent to the first device or sent to a third device.

4. The method of claim 1 , wherein the particular range of distance from the first device is a range of operation of the one or more cameras of the first device.

5. The method of claim 1 , wherein the receiving the information that indicates the presence of the second user includes:

receiving, by the first device, an identification of the second user.

6. The method of claim 1 , wherein the first device includes a first application, and wherein the first application receives the information that indicates the presence of the second user.

7. The method of claim 1 , wherein the information that indicates the presence of the second user is received from a third device.

8. The method of claim 1 , wherein the identified triggering event includes one or more user-defined parameters, and wherein the one or more user-defined parameters include one or more identifiers associated with one or more users or one or more time periods.

9. The method of claim 1 , wherein:

the identified triggering event includes a particular period of time,

the identifying the triggering event includes determining whether the particular period of time has elapsed subsequent to the determination that the second user is present within the particular range of distance from the first device, and

the changing the mode of operation of the first device includes, responsive to a determination that the particular period of time has elapsed, changing, by the first device associated with the first user, the mode of operation of the first device from the second mode of operation to the first mode of operation or to a third mode of operation.

10. A first device associated with a first user, the first device comprising:

at least one processor configured to perform or control performance of operations that include:

receive information that indicates a presence of a second user, wherein the information that indicates the presence of the second user is based on a visual determination of the presence of the second user;

determine, based at least on the received information, whether the second user is present within a particular range of distance from the first device;

identify, based at least on a determination that the second user is present within the particular range of distance from the first device, a triggering event that requires a change in a mode of operation of the first device from a first mode of operation to a second mode of operation; and

change, based at least on the identified triggering event, the mode of operation of the first device from the first mode of operation to the second mode of operation; and

one or more sensors configured to capture visual information, wherein the visual determination is based at least on the captured visual information.

11. The first device of claim 10 , wherein each of the first device and a second device, associated with the second user, includes a mobile device.

12. The first device of claim 10 , wherein the one or more sensors include one or more cameras configured to capture the visual information, and wherein the visual determination includes a comparison of the visual information with stored visual data to determine the presence of the second user.

13. The first device of claim 10 , wherein the information that indicates the presence of a second user is received from a server.

14. The first device of claim 13 , further comprising:

a mode database configured to store mode of operations that includes a notification mode, a power saving mode, and an airplane mode, wherein the notification mode includes a normal operation mode, a selective silent mode, a meeting mode, and a silent mode.

15. A non-transitory computer-readable medium, operable to be hosted on a first device associated with a first user, to store one or more executable instructions that, in response to execution by one or more processors, cause the one or more processors to perform operations comprising:

obtain, by the first device, information that indicates a presence of a second user, wherein the information that indicates the presence of the second user is based at least on a visual determination of the presence of the second user;

determine, by the first device and based at least on the received information, whether the second user is present within a particular range of distance from the first device;

identify, by the first device and based at least on a determination that the second user is present within the particular range of distance from the first device, a triggering event that requires a change in a mode of operation of the first device from a first mode of operation to a second mode of operation; and

change, by the first device and based at least on the identified triggering event, the mode of operation of the first device from the first mode of operation to the second mode of operation.

16. The non-transitory computer-readable medium of claim 15 , wherein the identified triggering event includes one or more identifiers associated with one or more users.

17. The non-transitory computer-readable medium of claim 15 , wherein the first mode includes an audible notification mode, and wherein the second mode includes a non-audible notification mode.

18. The non-transitory computer-readable medium of claim 15 , wherein the triggering event includes a passage of a particular period of time.

19. The non-transitory computer-readable medium of claim 18 , wherein the identification of the triggering event includes an identification that the particular period of time has elapsed subsequent to the determination that the second user is present within the particular range of distance from the first device.

20. The non-transitory computer-readable medium of claim 19 , wherein the one or more executable instructions further comprise instructions that, in response to execution by the one or more processors, cause the one or more processors to perform at least one operation comprising:

in response to identification that the particular period of time has elapsed, changing, by the first device, the mode of operation of the first device from the second mode of operation to the first mode of operation or to a third mode of operation.