Sorry if this is a dumb question, but I'm going to be overseas in a few weeks and am seriously considering buying the Desire Z there rather than getting the G2 in the US (I actually want the Sense UI), and I'm wondering if I take it home and use my T-Mobile SIM card, is it going to affect how I get my Android updates? Will I not get them? And will I not be able to use the HSPA+ speeds? Thanks in advance!