DEAR ABBY: I have a smartphone, and I love its convenience. I check my email, texts and voicemail three or four times a day and always try to respond promptly. But I do not carry my phone with me every moment of the day. Some family members insist that the polite thing to do is to return a text message or voicemail immediately. They carry their phones with them and constantly interrupt whatever they are involved with to answer the phone, send a text, etc. For my birthday, one relative gave me a little pouch on a string so I ...