Jambo! Cologne is cathedral views, Kölsch beer and carnival energy. Install a JamboSim eSIM before you fly and land at CGN already online.
Train times, hotel maps and event tickets all need data. A JamboSim eSIM is working before you reach the station under Terminal 2.
S-Bahn S19 reaches Köln Hauptbahnhof in about 15 minutes; regional trains serve Bonn in roughly 30.
Terminals 1 and 2 are a short walk apart. Local time is CET (UTC+1, UTC+2 in summer) and CGN is a big low-cost and night-freight hub.
Yes, you connect to a German network as soon as you land.
Yes, coverage spans Germany wherever there is signal.
Install before departure and activate on arrival.