Let me begin by saying that I understand the 4G indicator is for the HSPA+. I am considering buying the unlocked 4S, due to some upcoming trips abroad. Now, while I am in the US connected to ATT's HSPA+ on a factory unlocked iPhone 4S, will it display the 4G icon? I cannot seem to find anything concrete on whether of not it will only show on a ATT locked 4S. It would be nice to have the 4G indicator to know when it is connected to the HSPA+.