Since you're tech-savvy you probably don't need help choosing the tablet ?
As far as mobile access abroad goes, i would rely on free wireless access points in hotels, bars etc.
Probably not a very helpful answer !
All the best,
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment utiliser Live Photos ?