I would not care too much about the chart as it doesn't really state anything about what data it's based on. If your Norwegian plan includes just 1GB data and

I would not care too much about the chart as it doesn't really state anything about what data it's based on. If your Norwegian plan includes just 1GB data and free everything else then the price is probably at least twice the amount in the chart.(~12€) If your plan has 100GB then a normal price would normally be ~0.46€/GB. According to the definition written on the chart, you get "unlimited" data(1TB+) for 46€/month in Norway using the biggest provider. Data is a lot cheaper in Norway than the US, that's for sure.