Free wifi everywhere - ruin bars, New York Café, Széchenyi Baths changing rooms. Speed generally good, 20-50 mbps typical around Parliament.

Mobile data: Magyar Telekom and Telenor best coverage on Buda hills. EU roaming works perfectly. Tourist sims at Budapest Airport 3000 HUF for 5GB.

Best coworking cafes: Madal Café near Parliament building, Café Kör on Sas utca, Central Kávéház. Reliable wifi and outlets. Most places fine with laptops if ordering Hungarian coffee regularly.

BudapestWiFi public network spotty around Chain Bridge. Better get local Magyar Telekom data for longer digital nomad stays in Jewish Quarter.