[Device Reviews and Information] Alex1a:
for our convenience, I copy it here:

Jiayu S2_0530_204210 comes APP Details:
Applicati ** Provider.apk----------- application management information reserves (after removing the computer can not connect to synchronize phone number)
BackupRestoreConfirmation.apk---- gg mailbox backups (can be removed)
BatteryWarning.apk----------------- battery power tips (reservations recommended)
Bluetooth.apk----------------------- Bluetooth (reservations recommended)
Calculator.apk----------------------- calculator (can be removed)
Calendar.apk------------------------ Calendar (can be removed)
CalendarImporter.apk--------------- calendar services, the calendar can be deleted without
CalendarProvider.apk---------------- calendar store (reservations recommended)
CDS_INFO.apk-------------------- central dynamic memory _ information, system service class (not delete)
CellConnService.apk---------------- phone call system (not delete)
CertInstaller.apk--------------------- certificate installer (not delete)
ChromeBookmarksSyncAdapter.apk----- gg bookmark sync (can be removed)
com.android.flip.apk----------------- Operating Guide (can be removed)
com.baidu.input.apk----------------- degree Niang input method (can be removed)
com.google.android.street.apk------- gg street (can be removed)
Contacts.apk------------------------ contacts (not delete)
ContactsProvider.apk--------------- Contact store (not delete)
DataTransfer.apk-------------------- backup and recovery (reservations recommended)
DataUsageLockScreenClient.apk---- data applications and lock the screen clients (not delete)
DefaultContainerService.apk--------- default storage services (not delete)
DeskClock.apk---------------------- Alarm Clock (reservations recommended)
DownloadProvider.apk-------------- download store (not delete)
DownloadProviderUi.apk------------ download storage interface (reservations recommended)
DrmProvider.apk-------------------- DRM-protected data storage services (not delete)
Email.apk---------------------------- email (can be removed)
EngineerMode.apk------------------- engineering mode (not delete)
EngineerModeSim.apk--------------- sim card project mode (not delete)
Exchange2.apk----------------------- message collaboration services (can be removed)
FaceLock.apk------------------------ Face Unlock (can be removed)
FactoryMode.apk-------------------- factory pattern (not delete)
FileManager.apk--------------------- file manager (can be removed)
FMRadio.apk------------------------- Radio (can be removed)
fontshelper.apk----------------------- updated fonts (can be removed)
FusedLocation.apk------------------- GPS positioning auxiliary files (not delete)
Galaxy4.apk-------------------------- wallpapers black hole (can be removed)
Gallery2.apk-------------------------- gallery / camera (reservations recommended)
Glass.apk----------------------------- gg glasses do not understand what it meant
Gmail2.apk---------------------------- GMAIL mailbox (can be deleted)
GmsCore.apk------------------------ gg core markets (can be deleted)
GoogleBackupTransport.apk--------- gg backup transmission (can be removed)
GoogleBackupTransport.apk--------- gg backup transmission (can be removed)
GoogleCalendarSyncAdapter.apk---- gg calendar synchronization (can be removed)
GoogleContactsSyncAdapter.apk---- gg contacts sync adapter (can be removed)
GoogleEars.apk---------------------- gg song identification feature (can be removed)
GoogleFeedback.apk---------------- gg electronics market feedback (can be removed)
GoogleLoginService.apk------------- gg account management (can be removed)
GooglePartnerSetup.apk------------- gg partner (can be removed)
GoogleServicesFramework.apk------ gg services architecture (can be deleted))
GoogleTTS.apk---------------------- gg text-to-speech (can be deleted)
Grass.ap----------------------------- good domain default theme (based on personal preferences decided to delete or not to delete)
HoloSpiralWall **. Apk ------------- wallpapers related (not delete)
HTMLViewer.apk------------------- HTML viewer (txt View)
InputDevices.apk--------------------- OTG program (not delete)
KeyChain.apk------------------------ enter the service (not delete)
LatinIME.apk------------------------- Android input method (can be removed)
Launcher2.apk----------------------- starter (not delete)
Lights.apk---------------------------- beam themes (can be removed)
LiveWall ** s.apk------------------ Android Live Wallpaper (can be removed)
LocationEM.apk--------------------- engineer mode (not delete)
lovelyfonts_vanzo_noicon_6.26.apk------ font management (can be removed)
MagicSmokeWall ** s.apk--------- Magic Live Wallpaper (can be removed)
MediaProvider.apk------------------- media storage (can not be deleted, or can not set the tone)
MediaUploader.apk------------------ upload content (can not be deleted and can not be deleted after uploading MMS)
Mms.apk----------------------------- native SMS (not delete)
MTKAndroidSuiteDaemon.apk------- MediaTek Kean Zhuo Kit Wizard (can be removed)
MtkBt.apk---------------------------- MTK Bluetooth (like Bluetooth distance)
MTKLogger.apk---------------------- MTK mobile logger (can be removed)
MTKThermalManager.apk------------ MediaTek temperature detection and management (reservations recommended)
MtkWorldClockWidget.apk---------- World Clock plugin (can be removed)
Music.apk---------------------------- own music (which can be deleted and replaced with other players)
MusicFX.apk------------------------- music player sound equalizer (can be removed)
neiz_com.android.browser_core_system_000.apk------- own browser (can be removed)
NetworkLocation.apk----------------- provide network location (can delete, delete sometimes unable to locate, GPS is good no impact)
NoiseField.apk------------------------ bubble dynamic wallpaper (can be removed)
Omacp.apk--------------------------- phone's internal configuration information (not delete)
OneTimeInitializer.apk----------------- initial startup initialization (reservations recommended)
PackageInstaller.apk------------------- packaged Installation Manager (not delete)
PermissionControl.apk----------------- access control (not delete)
PhaseBeam.apk------------------------ dynamic rhythm of wallpaper light (can be removed)
Phone.apk----------------------------- phone dialer (not delete)
Phonesky.apk-------------------------- gg electronic stores (can be removed)
PicoTts.apk---------------------------- text-to-voice services (can be removed)
Protips.apk---------------------------- Desktop little green men plugin (can be deleted, how to play that prompted the phone)
Provision.apk-------------------------- initial system boot boot (not deleted, it was said to be the first start the reminder can be deleted)
QuickSearchBox.apk------------------ Quick Search (can be removed)
Ringdroid.apk-------------------------- ringtone clips (can be removed)
SchedulePowerOnOff.apk------------- timer switch (can be removed)
Settings.apk---------------------------- system settings (not delete)
SettingsProvider.apk------------------- settings are stored (not delete)
SharedStorageBackup.apk------------- shared storage backup (not delete)
Sky.apk------------------------------- sky theme (can be removed)
SoundRecorder.apk------------------- recorder (reservations recommended)
Stk1.apk------------------------------- SIM card stk boot prompt service (can be removed)
StkSelection.apk----------------------- SIM card services, is Mobile and China Unicom service (can be removed)
SysMarket_92_NoIcon.apk----------- Variety lock screen (can be removed)
SystemUI.apk------------------------- system user interface (not delete)
TelephonyProvider.apk---------------- telephone information storage (not delete)
ThemeChooser.apk------------------- theme selector (not delete)
ThemeManager.apk------------------- should also be a topic (not delete)
Todos.apk---------------------------- Do (can be deleted)
Torch.apk---------------------------- Flashlight (reservations recommended, can be replaced by another flashlight)
UpdateSystem.apk------------------- System Upgrade (can be removed)
UserDictionaryProvider.apk---------- user dictionary (not delete)
VideoEditor.apk--------------------- film studios (can be removed)
VideoFavorites.apk------------------ favorite contacts (there may be aspects of the video can be deleted)
VideoPlayer.apk--------------------- video player (can be removed)
VisualizationWall ** s.apk--------- music visualization wallpaper (can be removed)
VoiceCommand.apk----------------- voice commands (can be deleted)
VoiceUnlock.apk-------------------- voice unlocked (can be removed)
VpnDialogs.apk--------------------- dialing, internal landing and over the wall with the (proposed to retain)
Wall ** Chooser.apk-------------- static wallpaper selector (not delete)
YGPS.apk-------------------------- system GPS (not delete)
YL_ChenXiWeiLu.apk------------- Variety lock screen - Dawn (can be removed)
YL_GuangYun.apk----------------- Variety lock screen - Halo (can be removed)
YL_HuaZhuangHe.apk------------- Variety lock screen - dressing (can be removed)
YL_JinJu.apk----------------------- Variety lock screen - opera (can be removed)
YL_LouHuaLiuShui.apk------------ Variety lock screen - beaten (can be removed)
YL_MengHuangQiPao.apk--------- Variety lock screen - Dream Bubble (can be removed)
YL_TianMiLianRen.apk------------ Variety lock screen - Sweet Lover (can be deleted)
YL_XinChengZhuanShi.apk-------- Variety lock screen - Star Diamond (can be removed)
YL_YinHeHeiDong.apk------------ Variety lock screen - Milky Way black hole (can be removed)