How to modify the MS Teams Android app to use a different User-Agent on its login page

Tools needed

• apktool
• zipalign and apksigner and from the Android SDK Build Tools
• keytool from a Java JRE or JDK

Instructions

1. Get the APK of the current MS Teams app (e.g. by copying it from your phone or downloading from APKMirror). These instructions were tested with version 1416/1.0.0.2022394701, and assume it is saved as teams.apk.