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I am want to buy the T20 Waterproof Colorful Screen Smart Watch Bracelet with Heart Rate and Blood Pressure Monitoring. I require details; First of all, once you set it up with the app, it no longer needs to have a phone connected to it if I dont care about phone calls and messages on it right? My second question is, does it need a sim card or micro sd card to function or can it still do heart rate monitoring, step pedometer, and all other functions that do not require wi-fi or a phone? Watch,Bracelet T20 Waterproof Colorful Screen Smart Watch Bracelet with Heart Rate and Blood Pressure Monitoring montre intelligente
