Before that, there was a 4th bracelet and I did not know troubles with it. Long discharged and worked properly. I decided to upgrade to the seventh (global ru) and regretted it. Sometimes it stops working, as if falling into a dream and does not respond to pressing and is required through the "find a bracelet" application or something else. Sometimes the screen turns on strangely for a second and then goes out. But the worst thing is that it is not ated to firmware 2.0.0.2 - it reaches 10% and reboots with an ate error message. On a third-party resource, there are many people with a similar problem. There is also a problem with the fact that it does not determine sleep, although the fourth one considered everything correctly, even with sleep monitoring turned off, it can simply calculate right there, or it can simply ignore it.
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