Having spent several years living abroad, I got used to a regularly frustrating routine when keeping in touch with friends and family in the States. I’d check the time difference, then run through my different options: KakaoTalk, WhatsApp, Viber, Skype? Too often, I would select an option only to face lagging Internet connections and faint, far away sounding voices. Or, I’d wait with bated breath -- listening to a joke, or a laugh, or an important life update -- only for the screen to go black. Dropped call, again. In the midst of all this muddled communication, there’s flyp. The app allows you to add multiple real phone numbers on a single mobile device, so you can call and text away regardless of your current location. flyp has received some rave reviews: more than one million users have downloaded the app in the past nine months, and Flypsi, Inc., the company behind the app, has recently raised about $5.8 million in funding.