This brilliant case from a a Chinese manufacturer (of-course) allows you to run Android on an iPhone, because isn’t that what you really want from life.
MESUIT is the world’s first and only one smart hardware that runs Android OS on iPhones in the form of an app and supports one-key hot swapping.
Not only do you get an additional sim card, you will also get additional battery 1,700mAh battery for MESUIT for iPhone 6 or iPhone 6s while the MESUIT for iPhone 6 Plus and 6S Plus sports a slightly larger 2,500mAh battery. The smart case by Jijia runs on MESUIT OS 1.0 based, a custom Android OS.
The case costs about $150 USD [...]