This is Android on a ~600MHz ARMv6 processor with a SGX530. Skip to 2:20 for a demo of how quick the UI is.


I live in a third-world country with reasonably high poverty rates, and most of those in lower income brackets have switched to low-end Android smartphones, due to the availability of reasonably good hardware at around the price point of US$99 (1/4th minimum wage for the employed)

If you want to do some more digging, a local manufacturer called Cherry Mobile has a phone called the Flare:
1.2GHz Qualcomm Snapdragon (not a QSD S4PRO, but it's ARMv7), 512MB RAM, 800x480, WiFi and Bluetooth, GPS, Dual-SIM 3.5G+2G.

For US$99.