Cheap smartphones don't have to suck, but Microsoft's updated Nokia 105 is on a whole other level compared to some of the budget-friendly phones you might be considering. This feature phone is just $US20.
$US20! Think of all the things you can buy for $US20 that kind of suck. That can get you like... two tickets to a bad Michael Bay movie (if you're lucky) or Troll 2 on Blu-Ray on eBay. Or you could buy a whole PHONE from Microsoft. Pretty crazy.
This is the burner phone to end all burner phones. This update to the 105 replaces the previous one, which also cost just one Andrew Jackson to acquire. The phone is obviously for emerging markets -- it only sports 2G speeds, and has a 1.4-inch colour display and minimal memory. But it does have a standby life of 35 days and dual-sim capability along with a replaceable battery.