A tweet by @SamsungExynos has left us wondering if the Galaxy Note 4 could be equipped with a retinal scanner. The tweet mentions about improved security feature “unique to us” and the image in the tweet is depicting a smartphone with focus on the user's eye. This could mean something better than fingerprint scanner could be used in the Galaxy Note 4. A fingerprint scanner is already being used in the Galaxy S5 and the iPhone 5S.
Samsung is expected to unveil the Galaxy Note 4 in September during IFA 2014. It could feature a 5.7 inch QHD screen, Exynos 5433 octa-core processor, Mali-T760 GPU, 3GB of RAM, 32GB of internal storage, 16-megapixel camera, and Android 4.4 KitKat. It would also be available in a variant with Snapdragon 805 processor and Adreno 420 GPU.
— SamsungExynos (@SamsungExynos) July 12, 2014