Walmart continues to offer the ZTE Whirl 2 4G LTE Prepaid Android Smartphone for NET10 for $19.84. Opt for in-store pickup to avoid the $4.97 shipping charge. That's tied with our mention from last month, $30 off list price, and the lowest price we could find. It features a 3.5" touchscreen LCD, 1.2GHz quad-core processor, 3-megapixel camera, GPS, Bluetooth, and Android 4.3 OS (Jelly Bean).