< Firmware | Apple Watch
Apple Watch (1st generation)
Watch1,1
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch1,1 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch1,1 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch1,1 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch1,1 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch1,1 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch1,1 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch1,1 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch1,1 | 9 July 2018 | Release Notes Security Notes |
Watch1,2
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch1,2 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch1,2 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch1,2 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch1,2 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch1,2 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch1,2 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch1,2 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch1,2 | 9 July 2018 | Release Notes Security Notes |
Apple Watch Series 1
Watch2,6
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch2,6 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch2,6 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch2,6 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch2,6 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch2,6 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch2,6 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch2,6 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch2,6 | 9 July 2018 | Release Notes Security Notes |
Watch2,7
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch2,7 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch2,7 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch2,7 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch2,7 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch2,7 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch2,7 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch2,7 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch2,7 | 9 July 2018 | Release Notes Security Notes |
Apple Watch Series 2
Watch2,3
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch2,3 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch2,3 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch2,3 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch2,3 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch2,3 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch2,3 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch2,3 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch2,3 | 9 July 2018 | Release Notes Security Notes |
Watch2,4
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R372 | Watch2,4 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch2,4 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch2,4 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch2,4 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch2,4 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch2,4 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch2,4 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch2,4 | 9 July 2018 | Release Notes Security Notes |
Apple Watch Series 3
Watch3,1
| Version | Build | Keys | Baseband | Release Date | Release Notes |
|---|---|---|---|---|---|
| 4.0 | 15R610 | Watch3,1 | 1.00.03 | 19 September 2017 | Release Notes Security Notes |
| 4.0.1 | 15R654 | Watch3,1 | 4 October 2017 | Release Notes Security Notes | |
| 4.1 | 15R846 | Watch3,1 | 1.22.02 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch3,1 | 1.34.01 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch3,1 | 23 January 2018 | Release Notes Security Notes | |
| 4.2.3 | 15S600b | Watch3,1 | 19 February 2018 | Release Notes Security Notes | |
| 4.3 | 15T212 | Watch3,1 | 1.56.02 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch3,1 | 1.60.00 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch3,1 | 9 July 2018 | Release Notes Security Notes |
Watch3,2
| Version | Build | Keys | Baseband | Release Date | Release Notes |
|---|---|---|---|---|---|
| 4.0 | 15R610 | Watch3,2 | 1.00.03 | 19 September 2017 | Release Notes Security Notes |
| 4.0.1 | 15R654 | Watch3,2 | 4 October 2017 | Release Notes Security Notes | |
| 4.1 | 15R846 | Watch3,2 | 1.22.02 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch3,2 | 1.34.01 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch3,2 | 23 January 2018 | Release Notes Security Notes | |
| 4.2.3 | 15S600b | Watch3,2 | 19 February 2018 | Release Notes Security Notes | |
| 4.3 | 15T212 | Watch3,2 | 1.56.02 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch3,2 | 1.60.00 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch3,2 | 9 July 2018 | Release Notes Security Notes |
Watch3,3
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R607 | Watch3,3 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch3,3 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch3,3 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch3,3 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch3,3 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch3,3 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch3,3 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch3,3 | 9 July 2018 | Release Notes Security Notes |
Watch3,4
| Version | Build | Keys | Release Date | Release Notes |
|---|---|---|---|---|
| 4.0 | 15R607 | Watch3,4 | 19 September 2017 | Release Notes Security Notes |
| 4.1 | 15R846 | Watch3,4 | 31 October 2017 | Release Notes Security Notes |
| 4.2 | 15S102 | Watch3,4 | 5 December 2017 | Release Notes Security Notes |
| 4.2.2 | 15S542 | Watch3,4 | 23 January 2018 | Release Notes Security Notes |
| 4.2.3 | 15S600b | Watch3,4 | 19 February 2018 | Release Notes Security Notes |
| 4.3 | 15T212 | Watch3,4 | 29 March 2018 | Release Notes Security Notes |
| 4.3.1 | 15T567 | Watch3,4 | 29 May 2018 | Release Notes Security Notes |
| 4.3.2 | 15U70 | Watch3,4 | 9 July 2018 | Release Notes Security Notes |