Well, I remembered this from the TP1 days. It involves editing a single manila file and it works without needing to use Personalizer or any other program.
The file in question is: 1c684cd8_manila
You also need
m9editor
Steps:
1. Copy 1c684cd8_manila from your device's Windows directory with File Explorer (may not work), Resco Explorer, OR Total Commander.
2. Open m9editor
3. Click 3rd icon at the top "open mode9 file"
4. Browse for and open 1c684cd8_manila
5. In the "find" box at the top right, search for "carriertext", there should only be one instance and it should bring you to a line that says "Name=Instance Name Value="CarrierNetwork" or something very similar.
6. Remove the "CarrierNetwork" text from the yellow boxes below and press the "Ok" button.
7. Two lines below that you should see "Name=String Value="" Edit the second yellow box to whatever you want, and press the "Ok" button.
8. Save the file. (It is read only, so to make it writable you will have to right click the file before saving, go to properties, and uncheck the read-only attribute)
Optional two steps (one of the two is required):
9. Disable TF3D by going into settings>today>items>uncheck TouchFLO 3d
9b. Copy back to device replacing the one in Windows
9c. Re-enable TF3D
OR
9. Copy back to device replacing the one in Windows
9b. Soft-reset device.
When it is all done it should look like this:
and
For those of you who don't want to do this yourself, reply back to this thread with what you would like, and I will do it for you
ALSO: FOR THOSE OF YOU WHO WANT THIS DONE BY ME, AND HAVE "BACKGROUND4ALLPAGES" installed, you will
NEED to upload your 1c684cd8_manila
OR tell me in advance, as this file as this is edited by background4allpages and mine is stock.
Enjoy!
Update: Changing the carrier text will replace "Call History" with "# Missed Calls" # being the number, even if it is 0.
Update 2: I made a test call to my phone, and it changed to "1 Missed Call" but after tapping it and going into the call history, it went back to the original "Call History" so it appears to be temporary, and happens after soft-resets.