Hm, on second thought, will HSPA-capable devices require a power cycle to change the SIM? (I don't necessarily expect an answer, but it's something to consider.) Hopefully not, but AFAIK all current Nokia devices with a SIM slot do. If so, boot time and power consumption during boot/user session startup suddenly become much more important. This is one of a very few areas where Nokia should take hints from Apple IMHO.