A while ago I bought a Samsung Galaxy S6 Edge with a a dutch site called BelSimpel. This phone came with an contract from a dutch carrier called "Simpel", which is using the T-Mobile network.
When the phone arrived, it was still sealed and wasn't a dutch device based on the EAN number, it was delivered like buying a phone without a contract. A week later my sim-card came in, from the Simpel provider, so this was a SIM-only contract.
The phone is originally from Czech Republic.
When checking for updates on the live samsung updates feed for my phone, I see all updates getting released for a specific region (per provider per region).
Since my phone was delivered without a contract, how are updates getting released for my phone? Because I have a dutch carrier, using the T-Mobile network.