|AppRadio's microSD card slot (Photo courtesy: CNET)|
Here's the link to the firmware page: http://www.pioneerelectronics.com/PUSA/Car/AppRadio/AppRadio+(SPH-DA01)
The firmware is split into two files. A Boot File and the Firmware Update file itself. According to Pioneer, you will need two microSD cards to perform the update. The new features in this update have been reported before.
It will be interesting to hear about your update experiences and get some feedback. Feel free to leave a comment below. Happy updating!
Photo courtesy: CNET