Android SmsProvider, what does ICC stand for?

Specifically in the com/android/providers/telephony开发者_如何学Go/SmsProvider.java

what does ICC stand for?

ICC stands for Integrated Circuit Card (or, smart card). In this case, it looks like they use ICC to refer to the SIM card inside the phone, which is a smart card.

ICC is for Sim messages. See ManageSimMessages.Java inside mms/ui package which handles this.

Also see framework/base/telephony/java/android/telephony/SmsManager.Java where it "ICC (Integrated Circuit Card) is the card of the device. For example, this can be the SIM or USIM for GSM."