I tried the XDA developers upgrade V1.2 for my phone (sx56) and I've failed. error message was to check device manager to see if comm/USB was working properly. The screen on the phone said upgrading will take 5 minutes, then the connection thru USB failed. Now my phone screen still says upgrading and it's been 20 minutes with no progress. Now it's telling me to connect my device using activesync and it still connected.