Gsm sim card video door phone

GSM SIM card video door phone is a modern home security and communication device that combines traditional video intercom functionality with GSM mobile network technology. Here's a breakdown of what it is, how it works, and its benefits

What is a GSM SIM Card Video Door Phone?

A video door phone lets you see and talk to visitors at your door before opening it. When it includes GSM SIM card functionality, it means the device can communicate over mobile networks — just like a mobile phone — without needing a Wi-Fi connection or landline.

How It Works

1. SIM Card Slot: The door phone has a slot for a GSM SIM card (2G, 3G, or 4G, depending on the model).

2. Camera + Microphone: When someone presses the doorbell, the built-in camera and microphone capture video and audio.

3. Call or App Notification:

   • The system can call your mobile phone or send an app notification, depending on the setup.

   • Some systems use basic voice calls; others send video feeds to a smartphone app.

4. Two-Way Audio: You can speak to the visitor in real-time.

5. Remote Door Unlock: Some models let you unlock the door remotely via phone or app.

6. Recording: Often includes motion detection and recording features (saved to SD card or cloud).

Main Features

• No Wi-Fi needed (ideal for gates, remote locations)

• Mobile call function – the device can call multiple pre-set phone numbers

• HD camera with night vision

• Weatherproof design for outdoor use

• SMS alerts for missed calls or events (some models)

• Access control – keypad, RFID tags, or app-controlled unlocking

Benefits

• Access from anywhere via mobile phone

• Works in rural or remote areas with no broadband

• Improves security by screening visitors

• Convenient for elderly or physically limited users

• Easy to install compared to traditional wired intercoms

Popular Uses

• Private homes

• Villas and farms

• Remote gates or outbuildings

• Small offices or shops