Is mobile data required for SNCB train tickets in Belgium when using CoreESIM?

Yes, an active data connection via your CoreESIM is typically required for managing SNCB train tickets in Belgium. While tickets can often be stored offline after purchase, the initial purchase, real-time schedule checks, platform updates, and displaying dynamic QR codes for validation often necessitate internet access. Maintaining connectivity ensures you can retrieve and present your digital tickets promptly, avoiding potential complications or fines during inspections on Belgian rail services.