on my USCC Samsung mesmerize it says "original operator name: USCC" when my phone in the notification pulldown and the lockscreen say US Cellular.
Sent from my Galaxy S.
The text in your status bar is the network you're currently connected to and the text in the app is your carrier name that is taken from your sim card. If you have cyanogenmod you can change if spn or plmn will be displayed, usually it will be son but otherwise I can help you sorry.
yes, now the file is there, I opened in a text editor and my custom name is in there now.
I mounted r/o and rebooted.
That probably means your status bar isn't showing the spn, what the app modifies. If you have a rom that allows you to change it to spn it would work if you can't, you'll just have to wait for an update.
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