Quick tips about Hungary
Official Currency: Hungarian Forint (HUF). While some places will accept Euros, you should have some HUF cash on you. Some places will also take credit cards as well.
Electricity: The standard voltage is 230V. Power sockets are of type C, and F. Check here and see if you need to bring a travel adapter.
Data and Wifi: There is wifi almost everywhere in Budapest. The majority of coffee shops, restaurants and other touristy places will have wifi. And you will even notice signs on the street that direct you to outdoor wifi spots.