***** ***** Addendum
After testing more than 3 weeks, the playfulness has put something, and the battery lasts about 2 days with me.
The GPS works well, or I needed in the country, the support of GPS fix. Thus everything great and accurate.
Yesterday I noticed that I suddenly had no more sound,
the sound module has been frozen. In this case, a so-called cold-start help (?), Even removing the battery, wait a bit and assemble and launch. Tone was back.
First of all I had set the phone to factory settings, which brought nothing was therefore unnecessary.
For people wanting to post a LED light for incoming messages,
as there are numerous apps that do it. Had it tried on the BlackView, it comes with it, but you have to leave the bag for this, otherwise you can not see it.