Hi, I just purchased a unlocked at&t galaxy note and want to update to ICS. In the settings, there is a item say "Software update", when I select that and choose Check for updates, it ask if i want to "Check the AT&T server for new software update?" I am using t-mobile and want to know if its ok if I select yes to "Check the AT&T server for new software update?", will it lock my phone? Or have anyone follow this instruction to update your phone from I717UCLA1 to I777UCLF6? I guess my biggest concern is will the firmware update lock my phone? http://www.samsung.com/us/support/SupportOwnersFAQPopup.do?faq_id=FAQ00047453&fm_seq=51497 Thanks in advance for your help!