16, 32 or 64 GB of secondary storage. One of the leadingpetitors for the iPhone, the Samsung Galaxy S4, features 16, 32 or 64 GB of secondary memory, the same as the iPhone 5, but features a 1.9 GHz quad-core processor with 2 GB of RAM. The secondary memory can also be expanded by up to 64 GB by inserting an SD card.
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