Storage capacities available are fixed at 16 or 32 GB

plug-in memory card are not supported.
The iPhone 5c uses a Nano SIM card, same as the iPhone 5s and the iPhone 5.
iPhone 5c features an all-new design crafted from a single, hard-coated polycarbonate body with a steel reinforced frame for a solid, sturdy feel. The steel frame holds the internal components and also doubles as the iPhone 5cs multiband antenna.
 The enclosure is one continuous and seamless structure that is finished with a hard coat for a durable and incredibly glossy surface.
To complement the all-new iPhone 5c design, Apple created soft, matte, microfiber-lined cases in a very intentional contrast to the glossy, hard coat finish.
These sleek silicone cases with unique circular patterns let splashes of color show through, and with five iPhone 5c colors and six cases to choose from, you can mix and match for dozens of fun combinations. 

Please note: the iPhone 5c cannot be updated past iOS 10 since it is an older phone. It does not allow you to download WhatsApp only calls are allowed.