Asus Padfone X, Black 16gb GSM Unlocked (Phone Pad at The Same Time) Smartphone Incredible sound quality from both smartphone and tablet. You can create your own unique audio landscape in Audio Wizard, where Music, Movies and Games modes apply to the entertainment you choose. Speech mode makes voices clear and powerful, while Recording mode gives you the highest quality voice recordings. One data plan  Use the phones data plan to access the Internet in tablet mode Battery  The battery in the tablet station charges the smartphone when docked for 2x longer battery life 16GB of on-board storage and a MicroSD slot supporting up to 64GB of additional storage ensures that you have plenty of space to store the favorite music, movies, games and photos. This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.