Apple has been releasing its iPhone devices in September for the last four years, starting with the iPhone 5 in 2012 to the iPhone 6s in 2015 but this tradition could be broken with its upcoming flagship smartphone dubbed as the iPhone 7.

It was earlier reported that the iPhone 7 may see the light of day in September next year but a reliable source told AppleInsider that the next-generation device could be launched early. The report went on to say that the same source had provided correct information about Apple's products in the past. 

However, the source didn't reveal the tentative release date of the iPhone 6s successor.

It may be recalled that Apple used to release its iPhones in June and July till the iPhone 4s before shifting to September with the iPhone 5. So, it wouldn't come as a surprise if the Cupertino giant reverts to its old calendar and releases the iPhone 7 in mid 2016.

According to a research note by analyst Ming-Chi Kuo of KGI Securities obtained by AppleInsider, the iPhone 7 will sport a 4.7-inch display with A10 chip and 2 GB RAM under the hood, while the bigger iPhone 7 Plus will have same processor but a 3 GB RAM. 

Kuo had earlier said in a note to investors (via DigiTimes) that Apple is planning a super slim -- 6.0 and 6.5 mm thick – device which could be the upcoming iPhone 7. It is also reported that the new device will come without Home button, Samsung's OLED screen, six-element lenses, sapphire glass, wireless charger, water proof and complete metal body.