Cat B35 Black 2.4 4GB 4G Unlocked and; SIM Free . Key Features Unlocked and; SIM Free 4G Ready2300 mAh batteryTough and ReliableQualcomm Snapdragon 205 dual-core Processor + 512MB of RAMKaiOS4GB Storage + 128GB micro SD card slot . Rugged and ReliableThe CAT B35 has been tested in extreme conditions. This includes being IP68 certified so it is dustproof and waterproof to a depth of 1.2 metres for up to 35 minutes. It also adheres to MIL Spec 810G and can deal with repeated drops from 1.8 metres to concrete. 4G connectivity4G connectivity offers fast internet access including rapid downloading of apps and other data. This is especially useful when using Maps for navigating or if you need to quickly look something up online or through YouTube. Wi-Fi and Bluetooth includedThe inclusion of Wi-Fi and Bluetooth technologies means you can take advantage of free internet access points and the latest wireless accessories Long Lasting BatteryThe CAT b35 has a long lasting 2300 mAh battery which will allow you to get through a typical day of taking calls messaging and internet usage all important when you are working or enjoying the outdoors. KaiOSKaiOS is a new operating system developed from an Android core. It has been designed for installation on compact feature phones. Providing an intuitive interface plus modern smartphone-like features and apps. These include Google Assistant Google Maps Gmail Google Search and YouTube..