What Is My Number is a free app for Android and web that makes it easy to find your phone number in seconds. With just a tap of the "Detect Now" button, the app scans your SIM card and displays your phone number. If your phone number is not stored on your SIM card, the app provides a free number you can call to detect your number using caller ID.

This app is especially useful for people who have difficulty reading small numbers or remembering their phone number. It's also a great way to quickly show your phone number to new friends without having to search through your contacts. What Is My Number is a simple and efficient solution for finding your phone number, whether you're checking a new SIM card or just want to confirm your current number.

The app also includes additional features such as support for dual SIM card phones, information about SIM card(s) in your device, and the ability to turn your phone into a business card. It's a must-have utility for anyone who wants to easily and quickly find their phone number.

Note that due to the vast number of Android devices, some features may not work on every device. If you encounter any problems, you can contact the developer at to report any issues or suggest new features.