VNDPHONE is very easy to use, all you need to login or signup for a new account. VNDPHONE to VNDPHONE calls are FREE and anywhere else you can topup your account. VNDPHONE works with your cellular data or Wifi. You can buy the phone numbers from 60+ countries and ring to your phone with low monthly cost. So business and residential users always have access to their phone line and can easily keep in touch with business or personal contacts without using expensive cellular data plans.