if your carrier is not in list you need to make copy one of bundles and rename it to any name for your carrier, then edit some text in it and then finally you will need to make some LINK to that file, for example my carrier name is BeeLineAM, it is not in list, I have created BeeLineAM.bundle, edited text and than I made link of carrier code (in my case 28301) bundle.
To edit file you need to know also how your carrier name is presented in Iphone. Look on left top of iphone and remember how it is written. That what you need to add in files to match to your logo.

Give me your Carrier code and name which is shown on top of screen of iphone (type exactly as is) and I will make an example for you.