D410 Smart Door Controller SIM installation guide

Which SIM does the DoorBird D410 take?

A micro SIM (3FF) carrying data — note the size, as most current LTE kit takes nano. The D410 is DoorBird's LTE door controller: it brings the app-based DoorBird experience to sites with no network, so everything it does travels over 4G data.

Which network and allowance?

Strongest 4G data at the controller's position. Order it on the strongest of Vodafone, O2 and EE at the door — for an app-dependent device, connection quality is the product, so it is worth checking rather than guessing.

Allowance: DoorBird's cloud services plus event traffic. Moderate but continuous — measure month one and size from there.

Fitting the SIM

For the installing engineer, power down:

1. Fit the micro SIM in the D410's slot.
2. Power up and configure the mobile connection (APN per your provider) through DoorBird's setup process.
3. Pair with the DoorBird app and connected door stations per the documentation.

First test

Event from the door → notification on the phone → action fires. Then the handset housekeeping: app permissions and battery optimisation off.

If it won't connect

• No data: APN.
• Connected but app events lag: allowance and signal margin.
• Notifications die after days: phone-side battery settings.

FAQ

Micro SIM — really? Yes, 3FF. Don't arrive with only a nano.

Voice or data? Data.

Do other DoorBird units take SIMs? Mostly no — the wider range is PoE/WiFi. The D410 is the LTE piece.