Ein findiger User der XDA-Devs hat eine nette Liste erstellt, welche Apps man auf seinem Z1 ohne Komplikationen deaktivieren/löschen kann.
Deswegen Credits an [Fenix] und hier die Liste:

AccessoryKeyDispatcher.apk — event listener (unsure of trigger, hardware and handsfree keys work without it.)
Calculator.apk — default calculator
CdfInfoAccessor.apk — Software Component Descriptions
chinesetextinput.apk — chinese keyboard
com.whatsapp.apk — Whatsapp
com.sonyericsson.androidapp.foursquare_ext_ts3.apk — Timescape Foursquare Extension
com.sonyericsson.androidapp.timescapefeedsplugin.a pk — Timescape Feeds
CoreNotificationPublisher.apk — Lock Screen Notifications
CrashSMS.apk — Diagnostics Tool (debug helper)
datatrafficswitch.apk — mobile data on/off widget
DigitalClockWidget.apk — clock widget
DownloadProviderUi.apk — default browser downloads folder
EventStream.apk — Timescape
EventStreamPluginCallLog.apk — Timescape Call Log Extension
EventStreamPluginFacebook.apk — Timescape Facebook Extension
EventStreamPluginTelephony.apk — Timescape Telephony extension
EventStreamPluginTwitter.apk — Timescape Twitter extension
facebook.apk — Facebook
FBCalendarSync.apk — Sony Ericsson Facebook Integration Calendar Sync
FBMediaDiscovery.apk — Sony Ericsson Facebook Integration Media Discovery
FBMusicLike.apk — Sony Ericsson Facebook Integration Music Like
FBNotificationPublisher.apk — Sony Ericsson Facebook Integration Facebook Notifications
FBSetupwizard.apk — Sony Ericsson Facebook Integration Setup Wizard (not needed to setup or for FB Integration to work)
GenieWidget.apk — News and Weather
Gmail.apk — Gmail app
FoogleFeedback.apk — Market Feedback Agent (forceclose reporting for apps installed from Market)
GooglePartnerSetup.apk — Google Partner Setup (no longer needed after setting up Gmail)
GoogleQuickSearchBox.apk — google quick search box
HTMLViewer.apk — HTML viewer (view HTML files directly from file manager)
IddAgent.apk — Anonymous Usage Stats
JapaneseIME.apk — japanese keyboard
LearningClient.apk — learns user typed words for default keyboard
LiveWallpapers.apk — Live wallpapers pack
LivewareManager.apk — Liveware Manager
MagicSmokeWallpapers.apk — Live wallpaper
MediaWidget.apk — Media shortcuts widget
MediaUploader.apk — My Uploads for Youtube uploading (not needed if just watch Youtube)
MusicWidget.apk — default Music player widget
NotificationProvider.apk — Lock Screeen Notifications Storage
officesuite.apk — Office Suite
OmaDatasyncService.apk — Sony Ericsson Sync
PhotoWidget.apk — Picture Frame widget
playnowclientarvato.apk — Playnow Store (replaces the 2 APKs in the list directly below)
playnowappinstaller.apk — Playnow updater
playnowclient.apk — Playnow
POBoxSknPink.apk — japanese keyboard skin
POBoxSknWood.apk — japanese keyboard skin
Protips.apk — Pro Tips widget
qcsemcservice.apk — RIL extension for default browser
Radio.apk — FM radio
retaildemo.apk — retail demo
SecureClockJava.apk — web clock service (some DRM or Secure services may use this, restore if you need it.)
SemcCrashMonitor.apk — debugger
SemcDlna.apk — media server
SEMCFacebookService.apk — Sony Ericsson Facebook Integration Service
SEMCSetupWizard.apk — setup wizard
SemcVideoEdit.apk — video editor
SoundRecorder.apk — sound recorder
StatusSwitch.apk — Status switch widget
Stk.apk — Sim Tool Kit
Street.apk — Google Street view
SyncWizard.apk — Sony Ericsson Sync Account
timescapelegacywrapper.apk — Timescape plugin
TimescapeSpline.apk — Timescape widget spline
TimescapeWidget.apk — Timescape widget
touchnote.apk — Touch notes postcard
trackid.apk — TrackID
UnsupportedHeadsetNotification.apk — Possibly a notification when pairing with unsupported bluetooth headsets
usersupport.apk — Support
VisualizationWallpapers.apk — Live wallpaper
WallpaperPicker.apk — Sony Ericsson Wallpapers
widgetdigitalclock.apk — clock widget
widgetonoff.apk — widget on/off toggles
YouTube.apk — YouTube
Hier der original Thread: http://forum.xda-developers.com/show...2603236&page=2