iPhone 6S release date rumours & new features: Three new iPhones rumoured for 2015 including 'iPhone 6S mini'

Apple's iPhone 6 and iPhone 6 Plus may be just a few months old, but that hasn't stopped Apple watchers from looking ahead now that 2015 is on the horizon and wondering what Apple's smartphone plans for the year might be. Here, we round up all of the rumours about the iPhone 6's successor, dubbed iPhone 6S, including release date rumours, specs and new features.

In this article, we're focusing on the next-generation of iPhone, that is, the 4.7in iPhone 6 that launched in September. If you're looking for rumours about the next generation of Apple's 5.5in iPhone, the iPhone 6 Plus, see our iPhone 7 rumour round-up.

If you're after information about the iPhone 6 or iPhone 6 Plus, visit ouriPhone 6 review and iPhone 6 Plus review. See also: iPhone 6 vs iPhone 6 Plus.

The most likely release date for the iPhone 6S is September 2015, which would follow Apple's iPhone release schedule history. The iPhone 6 and 6 Plus were released in September 2014, the iPhone 5S and iPhone 5C in September 2013, the iPhone 5 in September 2012 and the iPhone 4S in October 2011.

However, it's possible that Apple will choose to begin releasing new smartphones twice a year, to keep up with the ever growing and improving competition from rivals such as Samsung, HTC, LG, Sony and more.

In fact, the latest rumour (albeit a particularly shaky one), suggests thatthe iPhone 6S could arrive in spring 2015 alongside the Apple Watch, which is also expected around that time.

That rumour comes from Stabley Times, which claims: "Our source says that Apple is hesitant about launching the iWatch [sic] in the spring of 2015 without a new iPhone to go along with it, as it could give hesitant consumers an excuse to wait on buying both until the fall."

Note that the report calls the Apple Watch the 'iWatch', a name that was widely rumoured for Apple's smartwatch but wasn't used by the company.

The report goes on to suggest that the iPhone 7 (which we assume would be the successor to the iPhone 6 Plus), is the smartphone that'll launch in September 2015. Unless, of course, it launches in spring 2016. (We did warn you that the rumour might not be completely reliable).