Virtual credit card: PrivacyA virtual credit card is a service that allows you to substitute a unique replacement number generated by software in place of your real credit card number. Second phone number: Google VoiceGoogle Voice is the simplest way to get a second phone number, which is useful for all sorts of reasons. Most people have one phone number, and in many cases, they’ve had that same phone number for decades. Some paid third-party services, including Burner and Hushed, offer disposable numbers, allowing you to assign yourself a random, temporary phone number. If you need only one additional phone number, the more affordable MySudo app, which we get to below, includes a phone number.