Question about edits to my apn

So I've been reading about how users here are able to edit their apn under settings on firmware PF2 but im on PF2 also and all my apn's are greyed out, along with the "add" button. I've read that users dont have to be rooted in order to change their apn's, so im not rooted either and I still cant edit them. Is there something that I'm missing? Does it have something to do with a my msl and a edit in my dialer under the ##data## menu?

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