I got an Otterbox Defender case the other day. Nice, but the SIM slot is covered. In fact, most of the others cases I have seen have the SIM slot covered. Is there a case for the iPhone 4S that leaves the SIM slot exposed? I got the (unlocked ) iPhone 4S in order to take it with me to Korea (I have been going to Korea every summer the last few years). It would be nice if I could avoid removing the case just to open the SIM slot. Thanks in advance for any info.