No more missed or unnecessary calls once the iPhone 6 arrives in the early months of 2014 as Apple mulls the introduction of phone status advisory, in real-time, allowing for active but subtle filtering of inbound and outbound communications.

In a new patent published this week, the iPhone maker appears investigating on the possibility of porting key instant messaging (IM) functions with future iOS smartphone iterations, Apple Insider said in a new report.

Of particular interest to the tech giant is the IM status notification found on popular applications like Skype, Viber and Yahoo Messenger. The planned mobile phone feature titled 'Methods to determine availability of user based on mobile phone status' should "make it easier for a caller to decide whether or not a callee is available to talk," the report said.

The patent aims to extend the functions of popular call screen methods like Caller ID by sending out real-time information that the caller can process before and after dialling the number of a friend, a relative or a work associate.

The whole set-up is very simple: an iPhone is hooked up to a server, which then transmits data to other iPhones regarding the former's current status, which is configured based on the owner's preferences.

The same iPhone will then automatically beam out a message that pretty much spells if the device user is ready to take a call or too busy to pick up the phone. The general idea copies the popular IM advisories such as 'Away', 'In a Meeting' or 'Available'.

With the updated information, a caller can then decide whether to make the call, postpone it for another time or simply send an SMS.

This feature empowers the caller to go ahead with a communication initiative with a higher likelihood of connecting with the intended party whereas in the past he or she "has no control over whether or not the call will be accepted," said the Apple patent filing.

On the part of the callee, he or she will be given full control of selectively taking calls as the system is programmed to filter calls from predetermined numbers, owners of which will the receive a message that notifies of the callee's busy status.

There is one thorny issue, however, that likely will hamper the technology's short-term implementation, Apple Insider said. Possible impacts on iPhone owners' privacy could delay the feature's deployment in time for the supposed iPhone 5S release date on Sept 20.

Hopefully, this would be ironed out in time for the iPhone 6 global rollout, which according to analysts will happen between January and March 2014. The device, likely of phablet-size, is rumoured to boast of a larger screen, an A8 processing chip and a new body-build that radically departs from the iPhone 5.