[Galaxy S II Android Development] jegormeister:
Just disable all voice apps. Below is the list of all app I disabled and it is pretty smooth and responsive.

Android live wallpapers 4.1.2-I9100XXLSJ (com.android.wallpaper)

Application monitor 1.1.0 (com.sec.android.widgetapp.programmonitorwidget)

Automation Test 1.0 (com.sec.android.app.DataCreate)

BluetoothTest 1.0 (com.sec.android.app.bluetoothtest)

ChatON 1.11.2 (com.sec.chaton)

ChocoEUKor 1.0 (com.monotype.android.font.chococooky)

Clock (digital) 1.0 (com.sec.android.widgetapp.digitalclock)

Clock (funky) 1.0 (com.sec.android.widgetapp.analogclockunique)

Clock (modern) 1.0 (com.sec.android.widgetapp.analogclocksimple)

com.sec.android.app.lcdtest 1.0 (com.sec.android.app.lcdtest)

CoolEUKor 1.0 (com.monotype.android.font.cooljazz)

Days 1.0 (com.sec.android.widgetapp.days)

DSMForwarding 4.1.2-I9100XXLSJ (com.sec.dsm.phone)

DSMLawmo 4.1.2-I9100XXLSJ (com.sec.dsm.system)

Dual Clock (analogue) 1.0 (com.sec.android.widgetapp.dualclockanalog)

Dual Clock (digital) 1.0 (com.sec.android.widgetapp.dualclockdigital)

Email 4.0 (com.android.email)

Enterprise SysScope Service 4.1.2-I9100XXLSJ (com.android.server.device.enterprise)

Enterprise VPN Services 4.1.2-I9100XXLSJ (com.android.server.vpn.enterprise)

EnterprisePermissions 1.0 (com.sec.enterprise.permissions)

Exchange services 4.1 (com.android.exchange)

Face Unlock 4.1.2-509230 (com.android.facelock)

Factory Test 1.0 (com.sec.android.app.factorytest)

Favorite Apps 1.0 (com.sec.android.favoriteappwidget)

Favorite Contacts 1.1 (com.sec.android.widgetapp.favoriteswidget)

Game Hub 2.0 (com.ngmoco.gamehubmobage)

Group Cast 1.5.40 (com.samsung.groupcast)

Help 1.0 (com.samsung.helphub)

Kies via Wi-Fi 2.0.0 (com.sec.android.app.kieswifi)

Kobo 2.7.940 (com.kobobooks.samsung.android)

MAPServiceSamsung 4.1.2-I9100XXLSJ (com.samsung.map)

Memo 1.0 (com.sec.android.app.memo)

Memo 1.0 (com.sec.android.widgetapp.memo)

Microbes 4.1.2-I9100XXLSJ (com.samsung.android.livewallpaper.microbesgl)

Mini Diary 1.0.5.20121102 (com.sec.android.app.minidiary)

Mobile print 1.6.1.0803 (com.sec.android.app.mobileprint)

Mobile tracker 1.0 (com.android.settings.mt)

My Files 1.0.0 (com.sec.android.app.myfiles)

News Daemon(EUR) 121023.01 (com.sec.android.daemonapp.ap.yahoonews)

Ocean weather 1.0 (com.sec.ccl.csp.app.secretwallpaper.themeone)

PressReader 4.1.1102 (com.newspaperdirect.pressreader.android.samsung)

Readers Hub 12.09.13.1 (com.sec.android.app.readershub)

RoseEUKor 1.0 (com.monotype.android.font.rosemary)

S Planner 4.1.2-I9100XXLSJ (com.android.calendar)

S Planner widget 1.0 (com.sec.android.widgetapp.SPlannerAppWidget)

Samsung Apps 2.8.036 (com.sec.android.app.samsungapps)

Samsung Backup Provider 1.2 (com.sec.android.sCloudBackupProvider)

Samsung Browser SyncAdapter 1.0 (com.sec.android.sCloudSyncBrowser)

Samsung Calendar SyncAdapter 1.0 (com.sec.android.sCloudSyncCalendar)

Samsung Cloud Data Relay 1.4.12r1 (com.sec.android.sCloudRelayData)

Samsung Contact SyncAdapter 1.0 (com.sec.android.sCloudSyncContacts)

Samsung keyboard 1.0 (com.sec.android.inputmethod)

Samsung Push Service 1.1.2 (com.sec.spp.push)

Samsung Syncadapters 2.2.5 (com.sec.android.sCloudSync)

Samsung TTS (com.samsung.SMT)

SamsungAppsUNA2 2.0.35 (com.sec.android.app.samsungapps.una2)

SASlideShow 1.0 (com.sec.android.saslideshow)

Self Test Mode 1.0 (com.sec.android.app.selftestmode)

Simple alarm clock 1.0 (com.sec.android.widgetapp.alarmclock)

SNS 1.1.0 (com.sec.android.app.sns3)

Software update v2.2.9 (com.sec.android.fotaclient)

Software update v5_1210_5_2 (com.wssyncmldm)

Stock Daemon(EUR) 121105.01 (com.sec.android.daemonapp.ap.yahoostock.stockclock)

Swype 1.3.3.9783 (com.nuance.swype.input)

SysScope 1.1.15 (com.sec.android.app.sysscope)

T-Mobile 4.1.2-I9100XXLSJ (com.android.stk)

Talk 4.1.2-509230 (com.google.android.talk)

TalkBack 3.1.1_r68 (com.google.android.marvin.talkback)

TouchWiz home 4.1.2-I9100XXLSJ (com.sec.android.app.launcher)

Trim 34.6.ms_hw (com.lifevibes.trimapp)

Try panning 1.0 (com.sec.android.motions.settings.panningtutorial)

TvOut 1.0 (com.teamhacksung.tvout)

Voice command 2.8.5 (com.vlingo.client.samsung)

Voice Recorder 0.1 (com.sec.android.app.voicerecorder)

Wi-Fi Direct 1.0 (com.sec.android.app.FileShareClient)

Wi-Fi Direct share 1.0 (com.sec.android.app.FileShareServer)

Windy weather 1.0 (com.sec.ccl.csp.app.secretwallpaper.themetwo)

WlanTest 1.0.0 (com.sec.android.app.wlantest)

wssyncmlnps 2.0.0 (com.wssnps)

Yahoo! Finance 121102.01 (com.sec.android.widgetapp.ap.yahoostock.stockclock)

Yahoo! News 12.11.01.01 (com.sec.android.widgetapp.ap.yahoonews)

Zinio 1.23.6131 (com.zinio.samsung.android)