A smartphone door lock lets you control access to your door wirelessly — no keys, no cards, just your mobile phone.
The Call-Key MCK400 is a straightforward access control device for doors, gates, and barriers where entry rights need to change regularly. Authorised users unlock the door by making a simple incoming call to the unit. The call triggers the relay output, releasing the connected lock or gate — no voice connection, no app required.
It’s a practical smartphone door lock solution for giving temporary access to contractors, cleaning staff, or service providers. There’s nothing to install on their phone and no complex setup on your end. For locations with rotating users or minimal infrastructure, the MCK400 offers a reliable, low-maintenance alternative to traditional key-based or card-based entry systems.
Simple Smartphone Door Lock Access Control via Mobile Phone
Once the MCK400 is registered in the online portal using the supplied SIM card, you can define access permissions in detail. Each phone number can be authorised for specific days, time slots, or fixed date ranges — giving you precise control over who can open the door and when, all managed remotely without visiting the site.
The unit only responds to recognised numbers. When an authorised number calls the device, the door or gate releases automatically. Every access event can be logged, giving you a clear record of entries for reference or accountability.
How to Set Up a Smartphone Door Lock
Here’s what you’ll need:
- Mobeye Call-Key MCK400.
- Mobeye SIM card (included).
- Electronic door lock.
Time needed: 20 minutes
To begin using the Mobeye Call-Key MCK400 to create a smartphone-connected door lock, follow these straightforward steps. For detailed instructions, please refer to the included manual.
- Insert the SIM Card
To use the Mobeye Call-Key, you’ll need a SIM card from any network. Make sure the PIN code is disabled or set to ‘0000’. Alternatively, activate the Mobeye SIM card and link your device to the Mobeye Internet Portal. Insert the SIM card into the access control unit. Once the SIM is active, the device can communicate over the mobile network without relying on Wi-Fi or a fixed line.
- Connect an Electronic Lock
Connect the electronic lock or strike to the relay output of the unit. The relay supports both pulse and switch commands, allowing it to work with most standard electric locks. Ensure that the connected lock does not exceed the maximum supported load (2A/30V).
- Connect the Power Supply
Attach the external power adapter to the power input. If required, insert backup batteries (4 * CR123/CR123A) to maintain operation during power failures. This is particularly useful in commercial or remote locations.
- Secure the Device
Close the housing and secure the unit using the supplied screws. Mount the device in a protected location near the door, gate, or barrier it controls.
- Set an Administrator Number
Programme at least one administrator phone number. The administrator receives system messages such as test reports, power loss notifications, and low-battery alerts. The system will not operate until an administrator number has been configured.
- Authorise Access Numbers
Add the phone numbers that are permitted to unlock the door. Each authorised number acts as a digital key. Access rights can be limited to specific days or time windows, making the system suitable for employee access, contractor entry, or temporary users. In the stand-alone version, you can authorise a maximum of fifty numbers using SMS commands.
- Unlock the Door by Phone Call
Authorised users unlock the door by placing a call to the system. The call is recognised, the relay activates, and the door unlocks without the call being answered. Each access event can be logged for later review. Please ensure that the number recognition for authorised numbers is enabled.
Suitable Applications
This smartphone door lock solution is commonly used for business premises, shared offices, storage units, service entrances, and temporary sites where a cost-effective and flexible access control method is required. Temporary access control for contractors, staff, and service providers without keys, apps, or complex installation.