Disable Bloatware Apps You Don't Use
Phone manufacturers pre-install dozens of apps — carrier apps, Facebook, games, brand-specific tools — many of which run in the background constantly. You can't delete them, but you can disable them: Settings → Apps → [App] → Disable. Safe to disable: Samsung Free, Bixby, carrier apps, pre-installed games, manufacturer's browser.
🟢 High Impact on RAM & Battery
💡 Don't disable Google Play Services, Google Play Store, or your phone app — these are essential.