Best Buy offers the ZTE Speed 4G Prepaid Android Smartphone for Boost Mobile model no. ZTE9130ABB, for $9.99. Opt for in-store pickup to avoid the $5.49 shipping fee. That's $10 under our mention from February and the lowest price we've seen. (It's the best deal now by $24.) It features a 4.5" touchscreen TFT LCD display, 1.2GHz quad-core processor, 8GB internal memory, 1GB RAM, 5-megapixel rear-facing camera, 2-megapixel front-facing camera, Bluetooth, and Android 4.4 (KitKat) OS.