If you need directory assistance and don’t feel like using your smartphone’s mobile browser to search for a number, you can call 800-FREE-411. You’ll have to listen to an advertisement, but you’ll get the number you’re looking for at no charge, instead of paying about $1 to $2 per 411 call, depending on your carrier. And remember, 800 calls are not free on a mobile phone, says Lubin, as they use up minutes on your voice plan. Alternatively, search on Google or Bing, or try the Yellow Pages mobile app. Another option is Verizon Visual 411.