Yes, you can track your lost phone from another phone by using the IMEI number. You can use the "Find My Device" feature on Android or the "Find My" app on iOS devices. These features allow you to locate your phone on a map and perform various actions such as locking the device or erasing its data. Additionally, some third-party apps can also help you track your lost phone using the IMEI number. However, it's important to note that for these methods to work, your phone needs to be turned on and connected to the internet.