The non-sensor part of the band on my UP3 broke after about 4 months. I contacted Jawbone support 3 times via the web, at about 1 week intervals, then gave up.
I called them about a month after at the toll-free number, was told all lines are busy, try again later, goodbye. I saw an article online where someone mentioned using Crazy Glue, so in the absence of any other options, I'm giving this a shot. While doing this for the band, I also noticed that the sensor band was about to fail in the same place. Let's hope the Crazy Glue works...
Hmmmm ... seems that the word counter is broken, as I can't submit a review using Chrome...
Review about: Jawbone Up3 Fitness Tracker.
Reason of review: Warranty issue.
Monetary Loss: $67.
Preferred solution: Replacement of the band, if possible, or the entire device, otherwise. The device worked quite well..
I liked: Device worked quite well, Functionality, Range of monitored data, Design of phone application.
I didn't like: Lack of support, Lack of technical support, Inability to reach anyone by phone at their listed number, Unresponsiveness to queries.