2nr - Darmowy Drugi Numer is a free app that enables you to obtain another mobile number. This is helpful for privacy, as it provides an alternative to giving out your main mobile number, yet, it still allows you to make telephone calls. The app is compatible with any telephone service that you may have.
If you are interested in using the app, then it is important to note that it is only available in Polish; if you do not speak the language, then you will need a device with a translation app to understand the interface. For an English-language alternative, you could try 2ndline Second Phone Number or, for texting, Text Free.
Store up to three numbers on a single SIM card for seven days each
The app allows you to store up to three numbers on the same SIM card. Each number will last for only seven days before expiring and cannot be used as permanent alternatives to your main number. However, if you need to use a false number on a temporary basis, the app lets you do just that.
Numbers can easily be removed, even before the seven-day period is over
You can easily remove the number and all associated contact records. While there is a limit on the numbers you can hold simultaneously, there is no limit on how many times you can delete and recreate numbers: the app is one that you can keep on using for as long as it is useful to you.
A useful app if you do not want to disclose your telephone number
There are many legitimate reasons why a person may be reluctant to disclose their telephone number, for example, to prevent nuisance calls. With 2nr - Darmowy Drugi Numer, you will have a quick and convenient means of making as many calls as you like while keeping your own number private. Just be warned that, if you cannot read Polish, you can expect a language barrier.