Duo Caller - Virtual Number is an iPhone application that allows users to easily purchase virtual phone numbers for making calls, receiving and sending messages. With this app, there is no need to buy a SIM card, sign a contract, or pay additional fees. The app offers various subscription options ranging from one week to one year.

The virtual numbers provided by Duo Caller can be used for a variety of purposes. Users can make calls to more than 20 countries, receive messages, and send messages (with some restrictions depending on the country and recipient). These numbers can also be used for registering with online services, cab services, online booking, delivery services, and as a second number for work, family, and friends.

The main features of Duo Caller - Virtual Number include incoming and outgoing calls, sending and receiving messages, sending and receiving MMS, call and message history, balance replenishment with virtual currency, and the ability to purchase multiple virtual numbers. The app offers several advantages, such as the avoidance of buying a SIM card, no contracts or additional payments, quick and easy number acquisition, and the ability to choose the perfect tariff plan.

Please note that by using Duo Caller, users are agreeing to the app's Privacy Policy and Terms of Use, which can be found at: [link]