Can you send a link to the tablet you use for cockpit navigation that does not require a mobile contract in the UK

I am being told by retailers I need a mobile contract to use GPS in a tablet , some on this forum say not required

Looking to get a genuine link or model number so I can go and purchase.

Thanks ...

Does anyone have experience with using skydemon on a Nvidia Shield K1 or a Samsung Galaxy Tab S2 (both 8 and 9.7 inches).
I need a new tablet (preferably between 8 and 10 inches) and these are the only tablets that really caught my attention lately.