Originally Posted by Nepomucene

You might want to check the option of mobile hotspot rental.
No need to have a second phone, of change the settings. You rent a totally pre configured mobile hotspot for the country you are visiting. Once there, you switch it on, a new wifi signal appears, you log on it, and the cost of being connected to the internet drops a lot.
To find the providers: google "rent mobile hotspot france" or "rent mobile hotspot england"
When comparing providers, check:
- Daily price
- How many MB are included per day
- Can the unused MB be reported to the next day
- How do I track my consumption
- Can I skype/VOIP
- Is the support/company in the same country (only way of having a quick fix in case of a faulty hotspot)
- What are the shipping costs
- Is the cost of return included

Enjoy!