The device was spotted on the CyanogenMod Git repository.
Shipments have also already begun in other European countries, including Germany, the Netherlands, and Spain.
The handset's standout feature is its 13 MP selfie camera, which has its own LED flash.
The upcoming second generation metal-clad A-series smartphone will be narrower than its predecessor.
The Exynos 8890 scored a new record in leaked benchmark from China.
OnePlus is offering both the OnePlus X or the OnePlus 2 with no invitation required. Some discounts to accessories are also available.