http://www.techadvisor.co.uk/feature...-connectivity/
For me it'll always be droid, like some others I'll never fall into the Apple trap......... But each to their own I guess!
Nexus 7 would if portability was high on my priorities be my #1 choice.
I like the look/speed/feel of the Tab 3 10.1 2014 edition but not sure if there is a 3g variant.
I use my N7 out and about with my phone acting as a wireless hotspot for on the move connectivity.