You can change the Master Code by using the System Code. The System Code is the only code that has the ability to change all codes for the Master and Users.
1) System Code: Default system code is 9876. Full Access to Alarm Panel
2) Master User:&nbsp;Default Master code is 1234. Full Access to Alarm Panel (Cannot change any Codes)
3) User 1: Default User 1 code is 1234. Arm/Disarm only (please change this default code now)
4) User 2: Default User 2 code is 1234. Arm/Disarm only (please change this default code now)
This video explains how to change the codes:
<a rel="nofollow noreferrer noopener" href="https://youtu.be/1L58pFGBj5w?si=imvsVUg3H4wfsWHt&amp;t=410">https://youtu.be/1L58pFGBj5w?si=imvsVUg3H4wfsWHt&amp;t=410</a>
If you forget your System Code, please follow the directions in this article:
<a rel="nofollow noreferrer noopener" href="https://osigodirect.kb.help/i-forgot-my-gen-2-key-codes/">https://osigodirect.kb.help/i-forgot-my-gen-2-key-codes/</a>
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You can change the Master Code by using the System Code. The System Code is the only code that has the ability to change all codes for the Master and Users.

1) System Code: Default system code is 9876. Full Access to Alarm Panel

2) Master User: Default Master code is 1234. Full Access to Alarm Panel (Cannot change any Codes)

3) User 1: Default User 1 code is 1234. Arm/Disarm only (please change this default code now)

4) User 2: Default User 2 code is 1234. Arm/Disarm only (please change this default code now)

This video explains how to change the codes:



If you forget your System Code, please follow the directions in this article:



 

Gen 2 alarm system codes explained

I forgot my Gen 2 Key Codes

Siren beeps to indicate pairing success, but siren does not sound when alarm is triggered by SOS, door sensor or motion detectors.

How to set up the OSI Smart Alarm System Gen 2

How to add PIR Motion Sensors to the OSI Alarm System Gen 2

How to add Contact Sensors to the OSI Alarm System Gen 2

How to add the Wireless Strobe Siren to the  OSI Alarm System Gen 2

How to connect the OSI Alarm System Gen 2 to Wi-Fi and Smart Life app

How to connect and setup your wired sensors to the Gen 2

Gen 2 Alarm Accessories Information & Specifications: max distance, battery info & Installation

How can I set a sensor so it alarms immediately when triggered

When I disarm the system with the app, the Strobe Siren continues to sound and flash. 

How to add more than one wireless strobe siren to the Gen 2 OSI Alarm System

Gen 2 Display Panel is plugged in but the battery is still at 0% 

Gen 2 Alarm System Features vs the Gen 1

Door and window sensor Open and Closed notification settings

How do I reset the Arm and Alarm history records on the Gen 2 alarm system & Security Records on the Smart Life app?

How will I know when the sensor batteries need replacing for the Gen 2

The alarm panel displays firmware version V2.1.22 but the 'Entry Notification' option does not display on the app settings 

Gen 2 Firmware V2.1.22 update

I have a cabin in a remote area that does not have internet.  Will the Gen 2 alarm system still work without Wi-Fi and can  it use a Sim Card?

How does the security panel alarm modes and accessories modes function

Motion sensor configured to 'Away' sets off alarm even when alarm panel is set to 'Home' monitoring state. The external siren will also not turn off when the alarm panel is 'Disarmed'

How to set up a schedule for the Gen 2 alarm panel to Arm and Disarm at a specific time daily.

Smart Life - Do Not Disturb Schedule

Smart Life app is not Discovering the Gen 2 alarm system device - What can you do?

When a Motion Sensor or Entry Sensor is Triggered, the Alarm Doesn't Sound or the Door/Window Sensor Doesn't Chime or Show an Open Warning

How can I check the Wi-Fi Signal strength of the Gen 2

How to reset and re-add the Gen 2 Wireless Siren

Gen 2 Motion Sensor is setting off the alarm system by itself.

How to set iPhone Smart Life notification to 'Persistent Notification'

Can I remove the stand at the back of the Gen 2 Alarm System?

What power transformer do I need to use  to connect to the DC12V 1A input on the alarm panel?

Will the Gen 2 send out a RF signal loss notification if a sensor is broken or damaged

What to do if your Gen 2 alarm system shows offline on the Smart Life app

Gen 2 open door warning still displays when the door or window has been closed

'Duplicate Paired Accessories' message while trying to add a second sensor to the Gen 2 alarm panel

Are the Gen 2  PIR Motion Sensor Pet Friendly

How to turn on Alarm Notifications for your OSI Gen 2 Alarm System - iPhone 

About the Gen 2 Key Codes - System, Master and User 1 & 2 

How to disable the Entry Sensor Door/Window Sensor Chime

How do the batteries hold up in cold weather? Say an unheated garage in Canada? -20 Celsius for a few months. How often should I plan on changing/charging.

How to check if two accessories whether two door sensors or two pir motion sensor  have the same serial number, this can also create a "Duplicate Paired Accessories" message.

Gen 2 is not charging and backup battery switch has been turned on

The Gen 2 siren has been paired, but it does not sound when a sensor is triggered

Can't pair sensor with alarm panel as it displays the 'Duplicate paired accessories' message.

When the Gen 2 alarm system is in disarmed mode and a door is opened the alarm sounds

How to disable the tamper alarm on Gen 2 contact sensors and motion detectors to replace batteries

What is the other button on the Gen 2 Motion Sensor labeled 1 & 2

How to pair the external Keypad with the Gen 2 Alarm Panel

Can the Gen 1 Door/Window Sensor be added to the Gen 2 Alarm Panel

How to create a smart life scene to turn a light on when the alarm is triggered & how to turn the light off when the alarm is disarmed - Gen 2

How to remove the Gen 2 Alarm System from the Smart Life app and then Re-Add it back to the Smart Life App (2 methods)

Rename the Gen 2 Controller to know who armed and disarmed the Gen 2 Alarm Panel using the controller

How to Create Two Scenes in the Smart Life App: First Scene to Arm the Alarm in 'Home' Mode with a 0-Second Alarm Delay, Second Scene to Arm the Alarm in 'Away' Mode with a Designated Alarm Delay

Reasons why, when approaching your home or small business you press disarm on the app, the Gen 2 does not disarm right away

A wireless PIR (Passive Infrared) motion sensor might alarm by itself due to several potential causes

Why Bluetooth and 2.4G Wi-Fi need to be enabled on your cell phone to add the Gen 2 to the Smart Life App

The Gen 2 Vibration Sensor is to sensitive, what can I do?

Does the Gen 2 Support 2.4G and 5G Wi-Fi and 4G Sim option?

How can I reset the Gen 2 without deleting the accessories I have added?

Google Home and Amazon Alexa

I paired the wireless siren with the Gen 2 but it is not sounding when a sensor is triggered or SOS button is pressed.

Is there away to hear the count down when arming the panel without turning on the other sounds? I only want to hear the countdown when arming when leaving or entering that the house it's armed. 

OSI Smart Alarm System (Gen 2)

Hi, how can we help?