Internal 64GB 4GB RAM, 128GB 8GB RAM. Warranty claims are subject to the discretion of the original product manufacturer. 3.5mm jack Yes. COMMSWLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct. 4G bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66.