What is APN and APN editing?

wirelessly posted (mozilla/5.0 (iphone; cpu iphone os 5_0_1 mac os x) applewebkit/534.46 (khtml, gecko) version/5.1 mobile/9a406 safari/7534.48.3)

have tetherme installed on iphone 4s , i'm wondering, use that? it's under cellular network.

 

access point name (apn) computer protocol typically allows user's computer access internet using mobile phone network.

 

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