Best Buy again 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 tied with our April mention as the lowest price we've seen. (It's the best deal now by $22.) It features a 4.5" 854x480 touchscreen LCD, 1.2GHz quad-core processor, 1GB RAM, 8GB internal memory, front and rear cameras, Bluetooth, and Android 4.4 OS (KitKat).