Best Buy offers the Huawei Union No-Contract Android Smartphone for Boost Mobile, model no. HUAY538, for $19.99. Opt for in-store pickup to dodge the $7.98 shipping fee. That's $10 under our December mention and the lowest price we've seen. (It's the best deal now by $7.) It features a Qualcomm 1.1GHz processor, 5-megapixel rear-facing camera, 8GB internal memory, 1GB RAM, and Android 5.1 (Lollipop) OS.