For all who are thinking of rooting and putting a custom ROM on the LG Optimus S. There is something you should know:
After installing a custom ROM, you'll find that the MMS will "break." In other words, you won't be able to send and receive MMS anymore. Thankfully, there is a pretty simple solution to this.
Go into your phone's dialer and type: ##data#
Afterwards, you'll be taken to a special screen. Scroll down to the icon labeled, "MMSC."
Click on "MMSC" and a dialog box will pop up and say "View" and "Edit."
Click on "Edit."
Then, you'll be prompted for some special number to enter in order to proceed. This number is called your MSL number. You'll need to call Ting and give them your phone number and ask them for what your MSL number is. Afterwards, come back and repeat these steps up to this point.
After entering your MSL number, you'll be allowed to modify the URL used for picture messaging. Delete the URL (which is most likely called):
And, enter the new URL that is associated with Ting:
After entering that URL, you are finished. You can now return to the home screen.