Motorola Moto E 2nd Generation XT1527 4.5" Unlocked GSM Quad-Core Smartphone - Black DOES THIS DEVICE NEED A SIM CARD: Yes it does Being that this device is GSM unlocked it will work on any GSM Network with a Micro size SIM Card The sim card does not come included and you will need to contact your Network Provider to acquire your complimentary Sim card (Free from most Carriers with activating of an account). WHAT NETWORK FREQUENCIES ARE SUPPORTED BY THIS DEVICE: LTE Cat4 700/850/1700/1900/2100/2600 (Bands 2,4,5,7,12,17) and GSM 850 / 900 / 1800 / 1900 As well as UMTS B2 (1900 PCS) B4 (1700/2100 AWS 1) B5 (850). The vast spectrum of bandwidth supported by this device gives it the ability to roam on LTE in many foreign countries, including all of Europe and much of Asia. HOW LONG CAN I EXPECT THE BATTERY TO LAST ME: Well the Built-in battery has 2390mAh which in a Usage time frame means 17 solid hours of streaming at 4G LTE speeds as well it has a Standby time of up to 300 hours before you need to recharge the battery. TELL ME SOME HARDWARE SPECKS: Well this device comes out of the box with Android 5.0, 5.1 (Lollipop) Being that this device was launched in Feb of 2015 there has yet to be an update on the OS although there was a speculated update to 6.0 (Marshmallow). This device runs a Qualcomm Snapdragon 410 Quad-core 1.2 GHz Cortex-A53 Processor and has Internal Built-in 8 GB, 1 GB RAM of memory with a microSD slot available up to 32 GB and only weighs a mere 5.11 oz. WHAT DOES UNLOCKED REALLY MEAN: Unlocked devices are compatible with GSM carriers the kinds that Use SIM Cards for Service like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers) Unlocked Devices will not work with CDMA Carriers the kinds that dont use sim cards for service like Sprint, Verizon, Boost or Virgin (contact your network provider prior to purchasing for verification that they support GSM frequencies).