T-Mobile cuts $90 off its Certified Pre-Owned Samsung Galaxy S8 4G LTE Android Smartphones for T-Mobile. Plus, free shipping applies. It features an octacore (2.3GHz Quad + 1.7GHz Quad) processor, 5.8" 2960x1440 touchscreen Super AMOLED LCD, 4GB RAM, 64GB internal storage, dual 12-megapixel rear-facing cameras, 8-megapixel front-facing camera, 4K video recording at 30fps, 802.11ac wireless, Bluetooth 5.0, microSD card slot, water-resistance, and Android 7.0 (Nougat).