Info SIM is a free Android application developed by Ferran Catalán that provides extensive information about your SIM card. This app comes in handy especially if you plan to switch to another phone company and need to know your ICC SIM number, IMEI, IMSI, SIM operator, data state, and signal strength. It also has a dual SIM mode, which allows you to check the information of both SIM cards if your device supports it.

The app is compatible with Android 9.0, and it has a straightforward interface that is easy to navigate. The information provided is accurate and relevant, making it a useful tool for anyone who needs to access their SIM card information quickly. However, it's worth noting that Samsung Oreo update may cause problems when using this app. Overall, Info SIM is a great program that offers valuable information about your SIM card and is definitely worth checking out.