ZTE makes the best $10-$20 phone I've seen anywhere. It is called the ZTE Zinger (T-Mobile) or ZTE Prelude 2 (AT&T) The formal model name is the Z667 or Z667T

ZTE makes the best $10-$20 phone I've seen anywhere. It is called the ZTE Zinger (T-Mobile) or ZTE Prelude 2 (AT&T) The formal model name is the Z667 or Z667T or Z667G Goes on sale that cheap a few times a year, otherwise $40 The screen is low resolution but you'd never know, works fine for all but the smallest text. It is dual core and runs KitKat 4.4 so it is very smooth. The problem is they are impossible to root and impossible to unlock bootloader. So they never took off. ZTE basically shot themselves in the foot and sold out to carrier desires. It should be a crime in the USA to not be able to root your phone if you paid for it.