Can I use
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TLS 1.1

- UNOFF

Version 1.1 of the Transport Layer Security (TLS) protocol, made obsolete by version 1.2.

Chrome

  1. ❌ 4 - 21: Not supported
  2. ✅ 22 - 84: Supported
  3. ◐ 85 - 97: Partial support
  4. ❌ 98 - 155: Not supported
  5. ❌ 156: Not supported
  6. ❌ 157 - 159: Not supported

Edge

  1. ✅ 12 - 84: Supported
  2. ◐ 85 - 97: Partial support
  3. ❌ 98 - 154: Not supported
  4. ❌ 155: Not supported

Safari

  1. ❌ 3.1 - 6.1: Not supported
  2. ✅ 7 - 13: Supported
  3. ✅ 13.1 - 14: Supported
  4. ◐ 14.1 - 26.6: Partial support
  5. ◐ 27: Partial support
  6. ◐ 27.1 - TP: Partial support

Firefox

  1. ❌ 2 - 22: Not supported
  2. ❌ 23: Disabled by default
  3. ✅ 24 - 67: Supported
  4. ✅ 68 - 77: Supported
  5. ◐ 78 - 96: Partial support
  6. ❌ 97 - 157: Not supported
  7. ❌ 158: Not supported
  8. ❌ 159 - 161: Not supported

Opera

  1. ❌ 9 - 12: Not supported
  2. ✅ 12.1 - 72: Supported
  3. ◐ 73 - 83: Partial support
  4. ❌ 84 - 134: Not supported
  5. ❌ 135: Not supported

IE

  1. ❌ 5.5 - 7: Not supported
  2. ❌ 8 - 10: Disabled by default
  3. ✅ 11: Supported

Chrome for Android

  1. ❌ 156: Not supported

Safari on iOS

  1. ❌ 3.2 - 4.3: Not supported
  2. ✅ 5 - 13.7: Supported
  3. ◐ 14 - 26.6: Partial support
  4. ◐ 27.0: Partial support
  5. ◐ 27.1 - 27.2: Partial support

Samsung Internet

  1. ✅ 4 - 9.2: Supported
  2. ❌ 10.1 - 29: Not supported
  3. ❌ 30: Not supported

Opera Mini

  1. ﹖ all: Support unknown

Opera Mobile

  1. ❌ 10 - 12: Not supported
  2. ✅ 12.1: Supported
  3. ❌ 80: Not supported

UC Browser for Android

  1. ❌ 15.5: Not supported

Android Browser

  1. ❌ 2.1 - 4.4.4: Not supported
  2. ❌ 156: Not supported

Firefox for Android

  1. ❌ 158: Not supported

QQ Browser

  1. ﹖ 14.9: Support unknown

Baidu Browser

  1. ﹖ 13.52: Support unknown

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported

TLS 1.0 & 1.1 are deprecated in Chrome, Edge, Firefox, Internet Explorer 11, & Safari.

Resources:
Removing Old Versions of TLS - Mozilla Security Blog
Modernizing TLS connections in Microsoft Edge and Internet Explorer 11 - Microsoft Windows Blog
Wikipedia article about TLS 1.1
Modernizing Transport Security - Google Security Blog
Deprecation of Legacy TLS 1.0 and 1.1 Versions - WebKit Blog