1. An electronic arrangement (200), optionally comprising one or more
servers, for a mobile communication network (106) to enable dynamic policy
regulation, through a master device (202), of a slave device (204), being a
user device operable in the mobile communication network, the
arrangement comprising at least one communication interface (212) for
transferring data, at least one processing unit (210) for processing
instructions and other data, and memory (214) for storing the instructions
and other data, said at least one processing unit being configured, in
accordance with the stored instructions, to cause:
receiving and storing an indication, preferably from the master device optionally being other user device operable in the mobile communication network, of the slave device, wherein the indication stipulates master and slave association between the devices in controlling usage of network resources, optionally comprising data transfer capacity and/or services, by the slave device,
receiving and identifying a request, from the master device, indicative of at least one policy adjustment to be enforced on the slave device regarding the usage of network resources, and
communicating the at least one policy adjustment to a policy control entity of the mobile communication network to instruct the policy control entity implement said at least one policy adjustment.
2. The arrangement of claim 1, configured to receive a registration message for policy regulation operations from the master device comprising a characterizing device, user and/or subscription identifier acknowledged by the arrangement, wherein the message is optionally provided by a client application running in the master device.
3. The arrangement of any preceding claim, configured to receive a registration message for policy regulation operations from the slave device comprising a characterizing device, user and/or subscription identifier acknowledged by the arrangement, where the message is optionally provided by a client application running in the slave device.

4. The arrangement of any preceding claim, wherein the indication comprises identifiers of the master and slave device in a selected format acknowledged by the arrangement.
5. The arrangement of any preceding claim, configured to request, from the policy control entity, subscription data regarding the slave device, including policy information associated with the subscription active in the slave device, further configured to determine available control options for policy regulation by the master device based on the received policy information, and configured to communicate at least part of the options to the master device.
6. The arrangement of any preceding claim, wherein the policy adjustment alters the settings, such as a policy rule, of at least one element having regard to the slave device selected from the group consisting of: data service settings, data transfer rate, service availability, 5G, 4G or 3.5G service availability, throttling, deep packet inspection, access to a website or URL (Uniform Resource Locator), access to a website or service containing or associated with a selected keyword, access to a selected type of data traffic or content, available account balance, remaining data quota, access to one or more services by a selected service provider, and maximum limit for data transfer per time unit.
7. The arrangement of any preceding claim, wherein the policy adjustment is temporally limited, optionally to certain time period that occurs only once or repeatedly, optionally regularly such as once a day or week.
8. The arrangement of any preceding claim, configured to identify the master and/or slave device based on at least one element selected from the group consisting of: MSISDN (Mobile Station International Subscriber Directory Number), IMEI (International Mobile Equipment Identity), MEID (Mobile Equipment Identifier), IMSI (International Mobile Subscriber Identity), user name, identifier permanently or temporarily uniquely identifying the device, identifier permanently or temporarily uniquely identifying a subscriber and/or subscriber token such as SIM (Subscriber Identity Module) smart card provided in the device, and identifier permanently or temporarily uniquely identifying a phone number associated with the device.

9. The arrangement of any preceding claim, configured to receive the indication stipulating the master and slave association between the master and slave devices from a policy regulation enabling client application running in the master device.
10. The arrangement of any preceding claim, configured to communicate, to the master device, a number of policies applicable for adjustment, optionally comprising a plurality of applicable policy adjustment options, having regard to the slave device.
11. The arrangement of any preceding claim, comprising the policy control entity configured to receive and implement the policy adjustment.
12. The arrangement of claim 11, wherein the policy control entity comprises at least one element selected from the group consisting of: a policy and charging rule function (PCRF), subscription profile repository (SPR), policy and charging enforcement function (PCEF), traffic detection function (TDF), policy decision function (PDF), charging rules function (CRF), deep packet inspection (DPI), charging system, offline charging system (OFCS), and online charging system (OCS).
13. The arrangement of any preceding claim, wherein the mobile
communication network comprises at least one element selected from the
group consisting of: LTE (Long Term Evolution) network, 3G network, 4G
network, UTRAN (UMTS Terrestrial Radio Access Network), E-UTRAN
(Evolved UTRAN), 4G access network, 3G access network, 4G core
network, EPC (Evolved Packet Core), at least partially virtualized core
network, at least partially virtualized access network.
14. The arrangement of any preceding claim, configured to determine a number of policies applicable for adjustment, optionally including a number of policy adjustment options, based on policy data, such as current policies, associated with the slave device and available at the policy control entity.
15. The arrangement of any preceding claim, configured to transmit a policy control application to the master and/or slave devices, optionally responsive to a message such as application request from the concerned devices.

16. A system comprising the arrangement of any preceding claim, further comprising the master and slave devices, configured to wirelessly communicate to define master and slave relationship therebetween, respectively, whereupon responsive to the communication the master device is configured to send said indication.
17. A user device (202), optionally a smartphone, tablet or other portable personal communications device, operable in a mobile communication network, comprising at least one communication interface for transferring data relative to the network, at least one processing unit for processing instructions and other data, and memory for storing the instructions and other data, said at least one processing unit being configured, in accordance with the stored instructions, to cause:
communicating an indication of master - slave relationship of the user device (202) and other user device (204), respectively, to a remote policy adjustment arrangement (200) accessible via the network,
receiving control input defining at least one policy adjustment to be taken into use relative to and enforced on the other user device regarding the usage of network resources by the other user device, and
communicating a request indicating said at least one policy adjustment to said remote policy adjustment arrangement accessible via the network for execution.
18. The device of claim 17, comprising a user interface, optionally a touchscreen, for capturing the control input from a user.
19. The device of any of claims 17-18, configured to receive, optionally via a short-range wireless connection, an information element, such as a code and/or identifier, from the other user device indicative of the slave role thereof.
20. The device of claim 19, configured to include the information element or data derived therefrom in the indication sent to the remote policy adjustment arrangement.
21. The device of any of claims 19-20, wherein the connection applied for

information transfer between the user devices comprises at least one wireless connection mechanism selected from the group consisting of: Bluetooth, WLAN (Wireless Local Area Network), RFID (Radio Frequency Identification), NFC (Near-Field Communication), infrared, inductive or resonant inductive coupling, and ultrasound.
22. The device of any of claims 17-21, configured to send a registration message for policy regulation operations to the policy adjustment arrangement, comprising a characterizing device, user and/or subscription identifier acknowledged by the arrangement.
23. A method (300) for controlling a mobile communication network to enable slave device policy regulation via a master device, the method comprising:
registering a first remote device, such as a user device, as a master device,
registering at least one user device, different from the first remote device, as a slave device to the master device, wherein the master and slave association between the devices indicates master device -originated control over the usage of network resources, such as data transfer capacity and/or services, by the slave device,
receiving, from the master device, a request for policy adjustment to be implemented and enforced on the slave device having regard to the use of network resources, such as communication resources, by the slave device, and
communicating the policy adjustment to a policy control entity of the mobile communication network to enable implementing and enforcing the service policy adjustment via the policy control entity.
24. The method of claim 23, wherein the method further comprises executing the policy adjustment.
25. Computer software product, embodied in a non-transitory computer readable carrier medium, comprising instructions causing a computer to execute method items of any of claims 23-24.