Other than exchanging APDU with the USIM card, how can I access the USIM's file management or perform some operations on the USIM (file deletion, update, and deactivation mainly) ?
Thank you for your insights!
All SIM card communications are based on APDU exchanges. The phone therefore can only interact with a SIM using APDUs. Depending on which files you are modifying there my be abstraction type libraries/functions that allow you to edit a SIM contact for example, however you must remember that these libraries are still eventually exchanging APDUs with the SIM.
Maybe if you provide more information around why you require an alternative way to manage SIM files a better answer can be provided?