I need a tablet for outdoor work and i would like to know if this device "Samsung Galaxy Tab 4 10.1 4G LTE" works fine with QGIS mobile application.
I have a Samsung Galaxy Note 10.1, no 4G though. I tried to install QGIS and was able to. However, the main panel was missing (Project, Edit, View, etc) so I couldn't find a way to connect to the GPS. From the information I've gathered, it is buggy and seems to not install properly and/or work at all but seems to be getting better.
Here are some useful resources I found:
A wiki site for QGIS/Android, http://hub.qgis.org/
This is more of open source solutions website. They have a section dedicated to QGIS/Android; http://www.opengis.ch/android-gis/
If you are going to attempt to install QGIS on your Android device, you'll need Ministro, which is a free download at the Play Store
You may try NextGIS mobile. This is native Android application with good QGIS integration.
The documentation is here: http://docs.nextgis.com/docs_ngmobile/source/toc.html
For collaborating field work I also recommend nextgis.com web GIS. It free and also has integration with QGIS (via NextGIS Connect plugin) and Mobile (native).