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,
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.