Problem description
Current API response gives no indication of when the physical device information was collected for the specified subscription identifier (e.g. phoneNumber). Dependent on the backend implementation, this information could have been collected some time earlier, and potentially be out of date

Possible evolution
Add an ageOfInfomation field to the response. Time unit TBD, but probably "hours" is sufficient. For "real-time" systems (for example, getting the IMEI information from the PCRF), the age would be 0.

Alternative solution
None proposed

Additional context
None