3G AT&T Wireless Security System w/ 3 Door/Window Sensors, Motion Sensor, 8-ft Cable

2gig gc3pk 3g a 2gig gc3pk10 3g a 3g at and t wireless security

Average rating:

(based upon one review)

The 2GIG GC3PK-3G-A is great kit for smaller homes, apartments and small businesses. This versatile kit includes a 2GIG GC3 System, 3 wireless door and window contacts, a motion sensor, an AT&T 3G Cellular Communicator and an easy-to-use installation cable. Buy this robust GC3 kit here.
  • Z-Wave
  • Z-Wave Plus
  • Home Assistant
  • Alarm.com
  • Amazon Alexa

This product is not sold by Alarm Grid at this time. As an alternative, we recommend:


The 2GIG GC3PK-3G-A provides all of the equipment that an apartment, small home or small business needs to achieve a dependable security setup. The kit is centered around the 2GIG GC3 Control Panel, which is one of the most impressive wireless all-in-one (AIO) systems currently available.

The complete kit provides a new 2GIG GC3 System, 3 VERSA-2GIG Door and Window Contacts, a 2GIG PIR1-345 Motion Sensor, a 3G AT&T Cellular Communicator, and a Honeywell LT-Cable for providing power. By being able to monitor up to three different doors and windows, this kit can provide top-level protection for virtually any apartment, small home or small business. The included motion sensor should be installed in a large central location near the primary entryway so that it will detect the motion from an intruder. This provides an added layer of security for an already robust setup.

The 3G AT&T Cellular Communicator allows the system to connect with the AT&T 3G Cellular Network and the Alarm.com servers. Cellular communication is incredibly reliable, and it will help to ensure that the system remains connected to the network at all times. Cellular connectivity almost never goes down or becomes unavailable. It is also unaffected by electrical outages, and it will continue to keep the system connected when the power is down. And since the GC3 also comes WIFI-ready, this kit will immediately allow the system to achieve a dual-path communication setup. However, users should note that a cellular monitoring plan will be needed to activate the communicator.

Once the communicator has been installed and activated, the system will be able to access the Alarm.com interactive service. Alarm.com allows a user to arm and disarm their system, check the current status of sensors, control smart home devices, and view the live feed of security cameras. All of this can be done from the Alarm.com website or by using the Alarm.com Mobile App on any Android or iOS device. Alarm.com access also allows the panel to be used with the Google Home and Amazon Alexa assistants.

The 2GIG GC3 supports 345 MHz security sensors. These include wireless 2GIG Sensors and the Honeywell 5800 Series Sensors. It is very easy to enroll new sensors with the system, and a user will have no problem expanding upon their setup if they desire. The panel supports a wide range of security and life-safety devices, including smoke detectors, glass break sensors, flood sensors and more. Any device that is added will be visible both from the panel and from the Alarm.com platform.

Brand: 2GIG

2GIG GC3PK-3G-A Compatible Products

Aeotec DSD37-ZWUS
Z-Wave Repeater
List Price:
Our Price: $34.99
Honeywell ZWSTAT - Z-Wave Thermostat
Honeywell ZWSTAT
Z-Wave Thermostat
Honeywell 5878 - Wireless Remote Alarm Keypad
Honeywell 5878
Wireless Remote Alarm Keypad

Kit Includes

VERSA-2GIG - Honeywell Lyric and 2GIG Compatible Sensor (POW)
Honeywell Lyric and 2GIG Compatible Sensor
List Price:
Our Price: $12.99
Honeywell LT-CABLE - Universal Security System Cable from above
Honeywell LT-CABLE
Universal Security System Power Supply Cable
List Price: $20.00
Our Price: $15.99
2GIG 3GA-A-GC3 - GC3 AT&T 3G Cellular Communicator
GC3 AT&T 3G Cellular Communicator
2GIG PIR1-345
Wireless PIR Motion Detector
List Price: $74.00
Our Price: $49.99
2GIG GC3 - DIY Wireless Security System w/ 7" Screen
DIY Wireless Security System w/ 7-inch Screen
List Price: $472.00
Our Price: $307.99
Get an LTE Kit Instead
Submitted on 12/31/2019 Alarm Grid

The 2GIG GC3PK-3G-A is a discontinued wireless security system kit from Alarm Grid. This kit featured the 2GIG GC3, an AT&T 3G Communicator, three (3) door/window contacts, one (1) motion sensor, and a Honeywell LT-Cable for providing power. It is no longer possible to activate the 2GIG GC3 using the communicator included with this kit. This is because Alarm.com no longer allows 3G activations, as AT&T is planning to shut down their 3G network in the near future. As a result, this is not a good kit to purchase if you are looking for a system to get monitored. However, the kit worked very well with Alarm.com before the 3G sunset took effect. And if you have one that is currently activated, it will still work well until AT&T shuts down its 3G network. At that point, you will need to replace the 3G communicator with an LTE module. Overall, the fact that this kit can no longer be activated is a serious downside. We give this product a 4 Star rating.

There are some positive aspects of the 2GIG GC3PK-3G-A. The 2GIG GC3 is an easy-to-use system that looks great mounted on a wall or positioned on a desk or table using a desk mount. The included sensors all work very well, and they will reliably alert the system to any intrusion events. The LT-Cable makes it easy to power the system. The system can still be used until AT&T shuts down its 3G network, provided that the system is already activated.

However, the downsides to the 2GIG GC3PK-3G-A are major deal-breakers for new buyers. This system can no longer be activated using the communicator included in this kit. You would need to get an LTE cellular communicator instead. The 2GIG GC3 has largely been replaced by the newer and more advanced 2GIG GC3e. We recommend getting the GC3e if you want a new 2GIG System. And once AT&T shuts down its 3G network, you will need to replace the communicator with an LTE module anyway. Otherwise the system will not work for alarm monitoring service.

The 2GIG GC3PK-3G-A was once a useful security system kit. But now it is defunct, and it has been replaced by newer, better technology. We do not recommend this kit for those who are looking to start new monitoring service. But if you have one activated, you can continue to use it for the time being. However, you should start thinking about your upgrade options sooner rather than later. You will need to either get an LTE communicator for your GC3, or upgrade to a new panel entirely. All things considered, we give the 2GIG GC3PK-3G-A 4 Stars.

Good: Easy to Use System, Panel Looks Great, Excellent Sensors, LT-Cable, Can Still Be Used Until AT&T 3G Network Shut Down

Bad: Can No Longer Be Activated, GC3 Discontinued, Must Receive LTE Upgrade Once AT&T Shuts Down 3G Network

Bottom Line: 4 Stars

* Based on a 10% APR with 12 months financing. APR's will vary between 10% - 30% based on credit score and various factors.