[Device Reviews and Information] guby:
Hello,

I have bought a Doogee F5 phone a few months ago and I want to ask a few questions regarding this phone and also make a review based on my usage so far. The main reason for this acquisition was the idea to have a secondary phone to use mainly for internet, GPS, keep a secondary sim with a provider that I use mainly when I'm in roaming and to give it to my kid to play around on it and in case it gets broken by unknown forces while he is using it I will not loose my main phone with all the stuff I've got on it.

I will write down the impressions and questions in a random order:

1. (Good) The acquisition price, 3GB RAM

2. (Bad) The fact that has an octacore micro clocked at 1.3GHz. It looks that 1.3GHz is not enough and I don't know how much the applications and/or Android OS are making use of this fact. I would say that a quad core clocked a little bit higher would have been a better solution for a phone like this.

3. (Bad) Initially I've used the phone with only one SIM and in the second slot I had a microSD card. Since about one month ago, I got a second SIM from another local mobile company, a sim with a mobile internet contract with the idea to use one sim for internet and the second one for phone calls and messages. The main problem is that once I configure one sim to use 3G/4G networks for internet access, the second one is automatically switched to 2G network without the possibility to switch to a 3G network for phone calls and messages. According to the providers that I use, the one that I want to use for calls and messages is only working on 3G, so the phone is useless. My biggest complaint is that I've tried to contact Doogee directly on their website several times and via email asking for a solution on this since on the phone specifications it's not stated that once one sim is configured on 3G the second one can be used only on 2G network and I didn't even got an reply from them telling me that they received my complain and it's under investigation. Does anyone know of a possible solution to this problem?

3. (Bad) The bluetooth connection is quite bad. When using the phone with some bluetooth headphones, the music get's disrupted and the range for the bluetooth connection is quite small comparing with some other devices, like a Nexus 5 phone (I know that they belong to different classes, but anyway, I find the connection quite bad.

4. (Bad) The GPS. After setting up a few GPS applications on the phone and starting to use them, it looks like the application remains behind while driving and it gets laggy. I saw this behavious on multiple applications like Waze or Here maps, and also the accuracy of the GPS doesn't look so good: from time to time it goes off the road through the fields :)

5. Is there any solution to force the CPU to keep 2 or 3 cores active all the time?

6. Is there any custom ROM working for this phone (I know about the cyanogenmod rom from MushroomLT, but from what I've read up until now I think that is not working so far)

7. (Bad) The screen pinning is NOT working on this device. You can activate it, you can set one application with the screen pinning activated, but after that it is not possible to go back since the Back and Overview buttons pressed at the same time are not woking. The Overview function is moved to the home button on this model as well as for the majority of the Chinese phones. Is there any fix known for this in order to have this function 100% present on the phone?

Thanks.