Originally Posted by freecia

200MB is useful if you've setup your phone's data usage policies with update apps/iOS via wifi, don't auto-refresh most e-mail accounts or poll on a longer interval, don't auto-backup photos to cloud, and no background data for most apps. I also don't have features like wifi-assist enabled.

My own rule of thumb for "travel mode" is to estimate ~ 100 MB per day. This consists of map apps for navigation, transit apps, light e-mail usage, a 1-2 photo uploads and ~ 20 photo downloads (instagram/twitter/etc), and light web based text messaging. I wait until I have a good wifi connection for larger bulk downloads like videos or playing games which require interent access.

Originally Posted by paperwastage

people who are rich and don't want to bother with buying foreign sims