Signal Support Center
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Desktop
Seamlessly move your private messaging experience from your mobile phone to your desktop computer and back.
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Android
Use Signal on your Android phone running Android 2.3+
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iOS
Signal from the Apple Store is designed for the iPhone, but is compatible with devices running iOS 8.0 or later.
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Security
This section contains common questions regarding safety and reliability of the technology in the apps.
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General
Promoted articles
- What is Signal Desktop?
- How do I install Signal Desktop?
- How do I message on Signal Desktop? How do I disable notifications? What are the features?
- Why do I only see new messages when I open Signal Android?
- How do I know my communication is private on Signal Android?
- Get started with Signal Android
- How do I start a voice or video call on my Android Phone?
- What do I do if I see an unregistered number alert?
- Get started with Signal iOS
- How do I start a voice or video call on my iPhone?
- How do I know my message was delivered?
- What is a safety number and why do I see that it changed?
- What does the verification SMS from Signal look like?
- Does Signal send my number to my contacts?
- Does Signal have disappearing messages?
- How do I join Signal's beta?
- How do I send you a debug log?
- Can I use Signal for work?
- How can I donate?
- How do I help?