The system launcher on my phone has a data usage that is non-zero. I've already disabled background data for it. I use Lawnchair2, but haven't tried to disable/uninstall the system launcher because I've read somewhere that it affects gesture navigation(Is it actually so?) I know that apps like Netguard can help, but is there a more direct solution, other than rooting? Are there any other adb commands that are useful, hopefully that are not too dangerous? I've recently found `adb shell pm trim-caches 99999M` Clears all/most app cache, without having to install some cache clear or use Gfiles. I don't really use it often. _______ Along with this, does anyone know way to troubleshoot gmail not being able to download attachments on mobile data? I've not disabled background data for that. Or should I make a separate post on it. Or would it be too tech-supporty?