Language:
French
Currency and banking:
The currency in France is the EURO. ATMs are accessible 24/7 and can be found all over the city. Card payments are generally possible in shops.
Telephone:
Country code: +33
Emergency number: 112
Internet:
The average internet speed in France is 389 Mbit/s (broadband speed) and 73.27 for mobile internet. The internet infrastructure in France is very developed and reliable, offering top speeds even in remote areas and villages. Cergy wi-fi is available in almost every bar, restaurant, and public space.
Electricity:
The voltage in France is 230 volts with a frequency of 50 Hertz, and the plugs are of the two-pin continental type.
Suggested taxi apps:
Uber is the most widely used taxi app internationally.
G7 from Paris to Cergy need a reservation a day before.