Whether you’re trying to make your work life more professional or your social life more private, a second phone line can be a great solution. Now new users can get one foronly $20 through Hushed, which is offering $5 off their secure lifetime plans with a special Memorial Day coupon. Rated 4.7/5 stars by purchasers, their basic plan gets you 6,000 SMS or 1,000 phone minutes for an entire year, and you can take your pick of area codes in the US or Canada when you set your number and voicemail. Calls and texts are made through the app, using WiFi or data to sidestep costly service charges. And t…