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It can automatically change settings on the phone for you. Like I installed a custom IPCC on my unlocked phone so I could enable tethering and MMS with full resolution pictures. They are very useful, and also can help if you are having problems with the carrier logo not displaying properly.
 
It can automatically change settings on the phone for you. Like I installed a custom IPCC on my unlocked phone so I could enable tethering and MMS with full resolution pictures. They are very useful, and also can help if you are having problems with the carrier logo not displaying properly.

And wouldn't it also give you the APN settings to get on the internet as well?
 
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