[Sony Xperia T, TL, TX, V] Tahax09:
that's what say's when i decompile :

D:\Apktool>apktool d System-UI_com.android.systemui_21.apk

I: Using Apktool 2.0.0 on System-UI_com.android.systemui_21.apk

I: Loading resource table...

I: Decoding AndroidManifest.xml with resources...

I: Loading resource table from file: C:\Users\xCloud\apktool\framework\1.apk

W: Could not decode attr value, using undecoded value instead: ns=androidprv, name=primaryUserOnly, value=0xffffffff

W: Could not decode attr value, using undecoded value instead: ns=androidprv, name=primaryUserOnly, value=0xffffffff

I: Regular manifest package...

I: Decoding file-resources...

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=handleDrawable, value=0x7f020041

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=outerRingDrawable, value=0x7f020047

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=pointDrawable, value=0x7f02003d

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=outerRadius, value=0x7f0800e8

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=glowRadius, value=0x7f08005a

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=vibrationDuration, value=0x00000014

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=snapMargin, value=0x7f0800e9

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=feedbackCount, value=0x00000001

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=firstItemOffset, value=0x7f0b003d

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=magneticTargets, value=0xffffffff

W: Could not decode attr value, using undecoded value instead: ns=prvandroid, name=allowScaling, value=0xffffffff

W: Could not decode attr value, using undecoded value instead: ns=internal, name=layout_maxHeight, value=0x00004001

W: Could not decode attr value, using undecoded value instead: ns=internal, name=layout_minHeight, value=0x00004001

I: Decoding values */* XMLs...

Exception in thread "main" brut.androlib.err.UndefinedResObject: resource spec: 0x01010551

at brut.androlib.res.data.ResPackage.getResSpec(ResPackage.java:59)

at brut.androlib.res.data.ResTable.getResSpec(ResTable.java:65)

at brut.androlib.res.data.ResTable.getResSpec(ResTable.java:61)

at brut.androlib.res.decoder.ResAttrDecoder.decode(ResAttrDecoder.java:36)

at brut.androlib.res.decoder.AXmlResourceParser.getAttributeValue(AXmlResourceParser.java:369)

at org.xmlpull.v1.wrapper.classic.XmlPullParserDelegate.getAttributeValue(XmlPullParserDelegate.java:69)

at org.xmlpull.v1.wrapper.classic.StaticXmlSerializerWrapper.writeStartTag(StaticXmlSerializerWrapper.java:267)

at org.xmlpull.v1.wrapper.classic.StaticXmlSerializerWrapper.event(StaticXmlSerializerWrapper.java:211)

at brut.androlib.res.decoder.XmlPullStreamDecoder$1.event(XmlPullStreamDecoder.java:83)

at brut.androlib.res.decoder.XmlPullStreamDecoder.decode(XmlPullStreamDecoder.java:141)

at brut.androlib.res.decoder.ResStreamDecoderContainer.decode(ResStreamDecoderContainer.java:33)

at brut.androlib.res.decoder.ResFileDecoder.decode(ResFileDecoder.java:114)

at brut.androlib.res.decoder.ResFileDecoder.decode(ResFileDecoder.java:99)

at brut.androlib.res.AndrolibResources.decode(AndrolibResources.java:247)

at brut.androlib.Androlib.decodeResourcesFull(Androlib.java:134)

at brut.androlib.ApkDecoder.decode(ApkDecoder.java:104)

at brut.apktool.Main.cmdDecode(Main.java:165)

at brut.apktool.Main.main(Main.java:81)