2ndLine – US Phone Number v20.21.0.1 (Premium) Apk: 2ndLine – US Phone Number v20.21.0.1 (Premium) Apk at andropark.info, 2ndLine is a second US or Canada phone number that works on your smartphone, tablets as a full-featured business phone system, designed for mobile professionals, freelancers, and entrepreneurs. Call and message from a separate number on devices