The new phone, which is unnamed beyond "E1005," has a 5.5-inch display which places it directly competition with the iPhone 6S Plus. The design appears to be a blend of the 6S and the iPhone 4, with rounded edges and a speaker/micro-USB setup that is similar to new iPhones.
Both the OnePlus One and OnePlus Two run a version of Android which has been "forked" - a process that essentially removes Google's services - making them popular in countries such as China, where Google is banned. The phones are incredibly cheap, especially when compared to high-end Android devices or the latest iPhones. The OnePlus Two is set to cost around £239 ($366) for the 16GB model.
OnePlus has an event scheduled in India today where the new handset may be unveiled.