Just simply add phone number and some text or each one.
By adding some text and let the phone number blanck, after scan users can send a message to there own add list(good for holiday messages and etc).
By adding phone numer and blanck message, let users send there own message to you(good for participate in a conversation).
By adding a phone number and certain text, let user send predefind text to you(good for subscribing or lottery).
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