Trade in Plus is an Android app developed by ENB MOBILE CARE, which helps users diagnose and value their smartphones accurately and easily. The app also facilitates the process of exchanging old smartphones with new ones at participating stores.

To use the app, users need to visit their favorite participating stores and download the app on their smartphones. Before starting the app, make sure that the smartphone is in normal condition and connected to the internet via mobile network or mobile data. Wi-Fi cannot be used to run this app.

Once the app is launched, click on "Start" and the app will automatically diagnose the smartphone. Follow the steps provided in the app until the valuation of the smartphone is displayed. Users can also enjoy some attractive benefits if they decide to exchange their smartphones using Trade in Plus.

To proceed with the transaction, users need to visit a participating mobile phone store that offers a trade-in or exchange program. Trade in Plus is a free utility and tools app that can make the process of exchanging smartphones easier and more convenient for users.