This silver coloured iPhone is packed with a vary vast area for the collection of important data, files, music videos, movies, etc., this internal memory is 128 GB and is not available for further extension through any SD card, neither there is a need for such upgradation. Another concealed fact is that this phone got a M9 coprocessor in it which gives you long period usability and a greater performance of battery, also this genius mini processor is connected to compass, gyroscope, accelerometer for fitness tracking.