Mini Cell Phone: The mini button phone has a speaker and microphone, so it can be used as a standalone primary phone when inserted into a Nano SIM card. Very practical for use when traveling or as a backup phone in the car. Music Player and Bluetooth Headset: Mobile phone can be used as a Bluetooth music player with clear voice and high Bluetooth connectivity with your MP3 music player for smartphones and tablets; it can be hooked up and used as a Bluetooth headset. High Safety: The mini cell phone's radiation rate is only 1/7 lower than other ordinary smartphones, making it the best phone for protecting pregnant women and babies from signal radiation. With ear hook, more comfortable and convenient. Dual SIM Card, Memory Expansion: Unlocked mobile phone supports dual SIM card and dual standby (SIM card is not included); Memory Card is supported for memory expansion (up to 32G, not included). 2G Network: BM70 mobile phone supports Nano SIM card for 2G networks: GSM 900 1800 850 1900 (unlocked GSM for for T Mobile or for Metro PCS, not for for AT 38;T, for Sprint 38; for Verizon or for Boost and other CDMA carriers).