iPhone 8 is a new generation of iPhone. Designed with most durable glass and a stronger aerospace-grade aluminum band. Charges wirelessly. Resists water and dust. 5.5-inch Retina HD display with True Tone. 12MP dual cameras offer improved Portrait mode and new Portrait Lighting.⁴ Powered by A11 Bionic, a most powerful smartphone chip. Supports augmented reality experiences in games and apps. With iPhone 8 Plus, intelligence has never looked better. Phone is GSM Unlocked- Will work on carriers that run on GSM networks; T-Mobile, At&t, h20, Metro, Cricket, Simple, etc.. Condition Notes:Good: C Stock - Plainly visible scratches on the body and screen and maybe even some dents on the exterior. Package Contents:1 Apple iPhone 8 Plus1 Charging Cable1 Charging Adapter1 Generic Box** Sim card not included*** Memory built in - SD Card NOT included 30 Days to Try and Return for Any Reason 6 Month Warrantied Against Defects What is GSM and CDMA? The majority of carriers, such as AT&T and T-Mobile, use Global System for Mobile communication (GSM) technology. GSM phones have a SIM card that stores your account information and, if you choose, your phone book. When you switch to a new phone, you can activate it by simply removing the card from inside the old phone and inserting it into the new one. Some major carriers, such as Sprint and Verizon networks, mainly use Code Division Multiple Access (CDMA) technology. These phones do not require a SIM card and are activated directly by the carrier. What is an Unlocked cellphone? Most cell phones are designed to use a SIM card which is issued by a carrier and provides cell service by activating any phone into which it is inserted. A locked phone will only recognize a SIM card from a particular carrier. The "lock" is a software setting that keeps the cell phone "loyal" to one carrier. If the cell phone is unlocked, it will recognize a SIM card from any carrier. An unlocked cellphone can work with most SIM cards and/or GSM service providers. It also allows you to switch carriers without having to buy a new phone.