My family has an LG VX8700 with the original firmware T87VZV01
I've read comments from a few people who said they were able to use the 4gb microsd card with this phone, but they did not specify what firmware was on their phone. I'm aware that there were two firmware updates (one of which was supposed to make the phone compatible with the 8gb microsd card). But since this phone is out of warranty I'm uncomfortable with having the firmware updated by Verizon in case something goes wrong.