But the Smartband might not work in all the localities because some places might be out network coverage or weak network connection. And also you can not use it to reply comments and type post. But can only be used to observe the inflow merits.
Those wristbands are not standalone devices but are meant to be connected to mobile via blue tooth. So you are correct they are prone to network issues when coverage is missing, but that would happen anyway. Also correct, they aren't meant to be used to reply to messages.