Hello, thank you for your availability and for the advice.
The GPS is a question of my obsession, I wanted to use your smartphone as a navigation system for a car, so I want to focus on a smartphone with GPS more accurate and reliable as possible.
Not all GPS mounted on smartphones are equal, I speak just in hardware, I saw that some lose GPS signal, or have a weak signal, just a cloudy day and the GPS fix is lost.
Among OnePlus one and zuk z1, prefer the zuk, hardware is virtually identical but zuk is built with premium materials, finally zuk Z1 has a much bigger battery.
I decided to take the smartphone on amazon, I have 30 days to try it, if I see that I do not like I return.
These are the differences between him and the zuk OnePlus one:
http://www.gsmarena.com/compare.php3?&idPhone2=7511&idPhone3=0&sSearch1=oneplus+one&idPhone1=6327
Regarding the GPS I had seen the movie you showed me, have you noticed how long it takes before the GPS satellite lock ? We hope it is not a defect of the smartphone.
I admit that I really like OnePlus 2, unfortunately is not shipped from Amazon with these smartphones in China is a problem with the service.
I also had another idea in mind, take a smartphone plus an external GPS like the Garmin Glo: https://buy.garmin.com/en-US/US/oem/sensors-and-boards/glo-/prod109827. html. That way I would have a GPS on top very precisely.
I do not know if the Garmin Glo is more accurate than a dedicated satellite navigation unit, otherwise I might take him zuk z1 and then combine it with a GPS like the Garmin 2597LM.