OnePlus 4

OnePlus 4

There was no OnePlus 4 smartphone. Models jumped from OnePlus 3 to OnePlus 5. See OnePlus.
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The OnePlus 5 is unique in its own way, as the company is skipping a generation - it is launching the OnePlus 5 after OnePlus 3T, instead of launching a OnePlus 4 in the chronological order.
To recall, OnePlus has been tipped to not call its next smartphone the OnePlus 4, as the Chinese believe that the number 4 brings bad luck.
The next flagship smartphone from OnePlus is said to be called the OnePlus 5 instead of the OnePlus 4 since the number four is associated with bad luck in China.
Unfortunately, there could be no OnePlus 4 next year.
Interestingly, since the Chinese believe that the number 4 is an unlucky digit, rumors are swirling that OnePlus is skipping the OnePlus 4 moniker and is instead introducing the OnePlus 5 in 2017.
So, in conclusion, the OnePlus 3T definitely offers some worthwhile upgrades, but if you already own a OnePlus 3 device and are not too desperate for a change, you could wait for the OnePlus 4.
It would set itself up for a major redesign/upgrade for the OnePlus 4 next year while also taking advantage of the hole left by the Samsung Galaxy Note 7, as pointed out by (http://bgr.com/2016/11/07/oneplus-3t-release-date/) BGR.
(http://www.ibtimes.co.uk/oneplus-4-specs-expect-flagship-include-8gb-ram-merged-os-experience-1582897) IBTimes UK repots that for next year, the company could be building a OnePlus 4 device that could sport a display with the size ranging from 5.5 inches to 6 inches.