Usage of SIM card GlobalPlatform keys in field

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Question 1. When a SIM manufacture personalizes a SIM card and then the mobile operator hand it over to an end user, are there any usage for GlobalPlatform (GP) keys (ENC,MAC,KEK,...)?

As long as I know the SIM file structure or its applets are accessible by (KID/KIC/KIK) over OTA RFM and RAM. So there is no need to have GP keys when SIM is in hands of customers.

Are there anywhere special (e.g. during OTA interactions that we require GP keys or not)? As I understood correctly, GP keys are usable when we physically can access a SIM card and we can directly send APDUs to the SIM. Am I right?

Question 2. Is it possible to access SIM/USIM file structure using global platform commands (e.g. is it possible to read record, read binary) using GP keys and access which ISD has? Typically file structure is accessible based on access conditions defined in 3GPP TS 51.011/ETSI TS 151 011 using PIN and ADM keys. But is it possible using GP keys and access which ISD has?



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