That would be the $99.99 HP 7 Plus, which is now available in the US market, after debuting in Europe a few months ago.
The quad-core processor is an 1GHz A31 provided by Allwinner Technology. The chip is based on the somewhat dated ARM Cortex A7 architecture.
So, it’s not the fastest mobile processor on the planet but it gets the job done for $100.
Other specs include the Android 4.2.2 Jelly Bean operating system, 1 GB SDRAM, 8 GB of storage (eMMC), 802.11b/g/n Wi-Fi, over 5 hours of battery life, a microSD slot, and a 7-inch diagonal IPS 1,024 x 600 display. More