Yes. Android Q, released as Android 10 (API level 29), added TLS 1.3 support and enabled it by default in Android’s default TLS implementation. That makes TLS 1.3 available for negotiation; it does not guarantee that every connection will use it. The other endpoint and the app’s protocol settings also matter.
What does “enabled by default” mean?
Android’s official Android 10 behavior-change guidance says, “In Android 10 and higher, TLS 1.3 is enabled by default for all TLS connections.” The platform’s default client and server socket configuration also lists TLS 1.3 as supported and enabled from API level 29 onward. Android 10 behavior changes · Android SSLSocket API reference
Enabled means the protocol is available to the TLS handshake under the default configuration. The connection negotiates a protocol version both endpoints and their configurations permit. A peer that does not support TLS 1.3, or app code that limits the protocol versions, can result in a different version being used.
Which Android versions support TLS 1.3 by default?
| Android release | API level | Documented default |
|---|---|---|
| Android 10 (Q) | 29 | TLS 1.3 supported and enabled by default for Android’s default TLS connections and sockets. |
| Android 10 and later | 29 and later | Android says TLS 1.3 is enabled by default for all TLS connections; default client and server sockets list it as supported and enabled. |
| Earlier than Android 10 | Below 29 | The cited Android socket table does not list TLS 1.3 as supported and enabled by default for these API levels. |
Android’s release documentation identifies Android 10 with API level 29 and says the release added TLS 1.3 support. Android 10 features and APIs
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Can an Android app disable TLS 1.3?
Yes. An app can request a TLS 1.2 context with SSLContext.getInstance("TLSv1.2"), or configure the enabled protocol versions on a suitable connection object using setEnabledProtocols(). These are app-level choices rather than a change to Android’s platform default. Use explicit protocol configuration only when compatibility requirements call for it; limiting versions can prevent a connection from using a newer protocol.
Cipher-suite configuration has a TLS 1.3 exception
When TLS 1.3 is enabled, Android keeps its supported TLS 1.3 cipher suites enabled. Attempts to disable those suites with setEnabledCipherSuites() are ignored. Do not assume the same cipher-suite control applies to TLS 1.3 as to earlier TLS versions. Android’s Android 10 behavior-change documentation
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What changes should developers account for?
- Handshake callback timing: With TLS 1.3,
HandshakeCompletedListenercallbacks occur before the session is added to the session cache. With TLS 1.2 and earlier, Android documents that they occur after the session is added. - Some SSLEngine exceptions: Cases that produced
SSLHandshakeExceptionon older Android versions can produceSSLProtocolExceptionon Android 10 and later. Exception handling should not assume identical behavior across versions. - 0-RTT: Android does not support TLS 1.3 0-RTT mode.
These details are documented in Android’s Android 10 behavior changes for all apps.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does TLS 1.3 make Android connections faster?
Android reports that TLS 1.3 made secure connection establishment up to 40% faster than TLS 1.2 in its benchmarks. Treat that as Android’s benchmark result, not a promised improvement for every device, network, server, or app. Android 10 features and APIs
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