[T-Mobile, Samsung Galaxy SIII] Danvdh:
This will guide will show you how to replace the touchwiz signal style with that of standard android AOSP style.

Preview

I assume the reader has basic knowledge of de-compiling and recompiling APK files, if you do not know how to do this use the search feature on XDA as this is covered in a ton of post's and really isn't that hard to do with some patience.

Step 1) Decompile systemui.apk

Step 2) Navigate to

res/layout/tw_signal_cluster_view.xml

Step 3) Delete everything here and replace it with this

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.SignalClusterView android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout android:id="@id/wifi_combo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="-6.0dip">
<ImageView android:id="@id/wifi_signal" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:layout_gravity="bottom|center" android:id="@id/wifi_inout" android:visibility="gone" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</FrameLayout>
<View android:id="@id/spacer" android:visibility="gone" android:layout_width="6.0dip" android:layout_height="6.0dip" />
<LinearLayout android:gravity="center" android:orientation="horizontal" android:id="@id/new_mobile_combo" android:layout_width="wrap_content" android:layout_height="wrap_content">
<FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content">
<View android:visibility="gone" android:layout_width="6.0dip" android:layout_height="6.0dip" />
<FrameLayout android:id="@id/mobile_combo" android:layout_width="wrap_content" android:layout_height="wrap_content">
<ImageView android:id="@id/mobile_type" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:id="@id/mobile_inout" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:id="@id/mobile_roaming" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</FrameLayout>
</FrameLayout>
<FrameLayout android:id="@id/separate_mobile" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="-18.0dip">
<ImageView android:id="@id/separate_mobile_type" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</FrameLayout>
<ImageView android:id="@id/mobile_signal" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</LinearLayout>
<ImageView android:id="@id/airplane" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:layout_gravity="bottom|center" android:id="@id/separate_mobile_inout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="-23.0dip" />
</com.android.systemui.statusbar.SignalClusterView>

4) Replace desired icon's in

res/drawable-xhdpi

this is my standard AOSP signal icon's that I use in my ROM Dandroid, get it here

5) Recompile with apktool

6) Open up the old systemui and new systemui with 7zip and copy over the meta-inf folder and androidmanifest.xml to the new systemUI

7) Push to system and enjoy

cheers

Dan