Two working mode:One is company mode(Bluetooth), It enable to make call or receive call or send or get message etc via Bluetooth. The other one is Network mode(Sim Card inserted). It enable to make call and send or get message via the SIM card you inserted which means at this time this watch works as a real cellphone;</br>Phone function: Make phone call directly from the smart watch,including answering and dial-up.SIM slot,Single SIM card (micro SIM card) can be as a phone,support make calls by Bluetooth or smart watch;GSM/GPRS 850/900/1800/1900(2G,not support CDMA); Call,hand free,call record,phone book;Bluetooth phone call;</br>Sync function: Whatsapp,Twitter,Facebook,Browser(need put a 2G/2.5G network SIM card); time,schedule,read text message;Sport health: Pedometer,sleep monitoring,sedentary remind;</br>Other functions: Image viewer, Sound recorder (need put and SD card ), Audio player, Remote capture, Alarm clock, Calendar,Camera (0.3M),Two way Anti-lost;</br>HD display: High sensitive capacitive touch screen;perfect match technology,1.54" TFT HD LCD; Resolution ratio: 240x240 pixel</br></br>Product Description</br></br><b>Note:</b><br> This watch is Bluetooth 3.0. All functions support android 4.3 and up smart phones.<br> But for iphone, it support answer & call, phone book, music play, camera, clock, pedometer, phone anti-lost alert, radio, sleep monitoring, etc. But not support SMS(with SIM card can be), remote camera control.<br> Android mobile scan QR code on watch menu or the following link download app.<br> https://play.google.com/store/apps/details?id=com.szkct.weloopbtnotifition.main<br> App not support ISO. </p> <b>Specifications </b><br> Size: 1.51x2.19x0.46inch <br> Appearance fish technology: Stainless steel wire drawing <br> Memory: Support max 32GB TF card <br> Bluetooth: Ver.3.0 <br> Camera: 0.3M <br>Net weight: 50g <br> Acceleration sensor: Support:3D acceleration, Step gauge analysis,Sedentary remind, Sleep monitoring, Anti lost, Remote picture <br> G-sensor: Yes </p><b> Main function </b> <br> Phone function: GSM/GPRS 850/900/1800/1900(2G,not support CDMA); Call,hand free,call record,phone book;Bluetooth phone call <br> Image viewer, Sound recorder, Audio player(need put and SD card )<br> SMS: Local SMS; Phone SMS Bluethooth synchronization <br> Phone calls reminding: Ring and shake <br> Clock display: 3 sets of display clock, Free switch <br> Two-way anti lost: Anti lost remind; Two way search <br> Pedometer: Step motion meter,Calories calculation,Sports mileage records <br> Sedentary remind: Sedentary remind; Sleep monitoring <br> Photograph: Watch photos,Storage to the watch; Remote photos,Storage to the phone <br> Alarm clock<br> Compass<br> Calendar<br> schedule sync <br> Stopwatch <br> Whatsapp,Twitter,Facebook (need put a SIM card)<br> Bluetooth push: News client information,System Settings information; Schedule, Synchronous remind Time synchronization </p><b>Package Included </b><br> 1 x Smart watch phone<br> 1 x USB cable <br> 1 x User manual<br> <b>The package does not contain SIM card and SD card</b></br><br/>http://www.amazon.com/gp/product/B01NCW8P0N