The update has downloaded to my phone and the first attempt to install it saw the watch just get stuck on one of the progress rings for ages while getting hotter and hotter. I had to do a factory reset of the watch which went ok and restored the backup which also went ok. Then tried to upgrade again but it wouldn't go past the terms and conditions page. Just sits there with the spinning ball. Another reset, didn't restore backup so left it as a fresh watch. Same problem. Any ideas what I could try next?