Network usage restriction: ○ SIM lock unlocked! Initialized and operation confirmed. Android version 5.1.1 This is a 4G device that can be used even after the end of DoCoMo 3G in March 2026. Since the SIM lock has been unlocked, it can also be used with cheap SIMs. You can also use it with Rakuten Mobile, LINE Mobile, etc. Please refer to the website for details. Cleaned with alcohol cleaner. Can be used hygienically. Back cover is missing. Instruction manual can be downloaded.