What's My Number? is a free Android app developed by LvB Software, falling under the category of Utilities & Tools. As the name suggests, it displays the phone number of the SIM card inserted in your device. The app is small in size and easy to use, making it a handy tool for those who need to check their phone number quickly.

The app automatically detects the SIM card and displays the phone number associated with it. It works well with most SIM cards, but in some cases, it may not be able to retrieve the number due to certain network restrictions. The app does not require any special permissions and is completely safe to use.

Overall, What's My Number? is a simple yet useful app for anyone who needs to quickly check their phone number without having to go through the settings or contacting their service provider.