Originally Posted by
kissTheApex
Mine also resides in the seatpost for the last 9 months and never had a problem with it. Once during an indoor ride, it dropped connection long enough for me to notice.
no new firmware releases since the time I got it, so never updated the firmware with it, but I believe the initial wireless updates bricking the Di2 issues were resolved with an app update.
I think this is correct. I just installed an XT Di2 ssytem, it INSISTED I had to use the mobile version in order to check and update the units. It would not do this on the PC link. It still failed 4 times before the 5th try worked, so clearly Shimano hasn't perfected this as yet and is the reason I don;t muck with my road system, it works so am leaving it alone.