OTA Updates (Over-the-Air Updates) have been introduced with iOS 5. The device contacts mesu.apple.com to check for updates. The updates are delivered in plain unencrypted ZIP files.
OTA Update Files
Version
|
Build
|
Prerequisite Build
|
OTA Download URL
|
Type
|
Comments
|
File Size
|
5.0b5
|
9A5288d
|
9A5259f
|
9023d1ebd320d91b35fb3820b3c2ed0ce42c6d03.zip
|
Beta
|
|
193,443,604
|
5.0b5
|
9A5288d
|
9A5259f
|
e32a3ed51a0913d882d7e8a87af0623d8f191e60.zip
|
Carrier
|
|
195,891,742
|
5.0.1b2
|
9A404
|
9A402
|
04d4f2d4537ac918ac3e494788c282bb67001bbb.zip
|
Beta
|
|
39,473,876
|
5.0.1
|
9A405
|
9A334
|
a10da09644bd17d9ad67e88ba5224b719faa7b95.zip
|
Release
|
|
41,066,648
|
5.1b3
|
9B5141a
|
9B5127c
|
0ed3620795c3e7c46f9153d15764669ce5b38d3a.zip
|
Beta
|
|
?
|
5.1
|
9B176
|
9A334
|
0f536b7c0b32a36f211d5ec9de49b5af5a446637.zip
|
Release
|
|
206,257,384
|
Version
|
Build
|
Prerequisite Build
|
OTA Download URL
|
Type
|
Comments
|
File Size
|
5.0b5
|
9A5288d
|
9A5259f
|
5f3c1bb45bdf4ec0b34be4554516a09a245bfdb4.zip
|
Beta
|
|
179,789,824
|
5.0b5
|
9A5288d
|
9A5259f
|
30a65ecc4bd61b2298c28676d025ae4babad337c.zip
|
Carrier
|
|
182,017,013
|
5.0b5
|
9A5288d
|
9A5274d
|
ff1081181b5647475f62bf5c19c04c0386adb103.zip
|
Beta
|
|
119,114,569
|
5.0GM?
|
9A332
|
|
|
Possible GM?
|
|
|
5.0.1b2
|
9A404
|
9A402
|
ae57c4dc797aeb0c6f230172c49ad54de9b75aa3.zip
|
Beta
|
|
39,717,063
|
5.0.1
|
9A405
|
9A334
|
19f78b3b21dc48a8a5baea455377c134321b5887.zip
|
Release
|
|
40,811,305
|
5.1b3
|
9B5141a
|
9B5127c
|
ffd65cefb4f892725a2592960f953a31944872e2.zip
|
Beta
|
|
?
|
5.1
|
9B176
|
9A405
|
0e0e6444cae79c3c809107eb61c3ee6c75c10c2f.zip
|
Release
|
|
110,916,945
|
Version
|
Build
|
Prerequisite Build
|
OTA Download URL
|
Type
|
Comments
|
File Size
|
5.0b5
|
9A5288d
|
9A5259f
|
05e3a3f0fc43c968f93af8464720c50fbd0ad620.zip
|
Carrier
|
|
193,261,005
|
5.0b5
|
9A5288d
|
9A5274d
|
cde871abbf88d40ff2de05b729ae7d77299cb718.zip
|
Beta
|
|
135,075,264
|
5.0b5
|
9A5288d
|
9A5274d
|
af342f8dbdcfb16cecef31b915b172b1b54923ca.zip
|
Carrier
|
|
135,591,402
|
5.0.1b2
|
9A404
|
9A402
|
accafa6d7e44bac2f21f52e579b20ec877d725e2.zip
|
Beta
|
|
45,464,950
|
5.0.1
|
9A405
|
9A334
|
18d1ad5c7de11dced1914b59be08eaa2a3e6503d.zip
|
Release
|
|
46,787,119
|
5.1b3
|
9B5141a
|
9B5127c
|
f7b405cca1af5de58a49c63772e59a8feb17a877.zip
|
Beta
|
|
?
|
5.1
|
9B176
|
9A334
|
03e5a74f68e6d997820fce4584d4c4b248b7a311.zip
|
Release
|
|
186,113,559
|
5.1
|
9B176
|
9A405
|
4df53ad9e8cbf24a021ea6619654dec4c15fe942.zip
|
Release
|
|
186,154,575
|
Version
|
Build
|
Prerequisite Build
|
OTA Download URL
|
Type
|
Comments
|
File Size
|
5.0.1b2
|
9A404
|
9A402
|
554f7813ac09d45256faad560b566814c983bd4b.zip
|
Beta
|
|
839,302,389
|
5.0.1
|
9A405
|
9A334
|
323d76efa3e44947838dca305cd104ca740dd30c.zip
|
Release
|
|
58,221,403
|
5.1b3
|
9B5141a
|
9B5127c
|
5e15af51bc7ee8c741d7b25dd1ae7653dcb1efb3.zip
|
Beta
|
|
?
|
5.1
|
9B179
|
9A405
|
a37da9fd18dd0a40d46192b63ed5069fa4e852c9.zip
|
Release
|
|
198,459,428
|
5.1
|
9B179
|
9A334
|
bdf35bb991b25d0ecc0e2cfb2d59f99d63082c09.zip
|
Release
|
|
198,658,723
|
5.1
|
9B179
|
9A406
|
94fbce740b4e3f59f047ce5369c7afb5f806e249.zip
|
Release
|
|
198,383,965
|
Version
|
Build
|
Prerequisite Build
|
OTA Download URL
|
Type
|
Comments
|
File Size
|
5.0b5
|
9A5288d
|
9A5259f
|
d143312070ccc3d4b3758fa1d0b4732ecb20721b.zip
|
Beta
|
|
185,480,615
|
5.0b5
|
9A5288d
|
9A5274d
|
03351fa4268c0bbaeef301c20c92ea1b2c0bb338.zip
|
Beta
|
|
129,931,195
|
5.0.1b2
|
9A404
|
9A402
|
97bbaa762247dc9cad795148251fa641cceba24f.zip
|
Beta
|
|
40,140,664
|
5.0.1
|
9A405
|
9A334
|
ee5492289cb3126be3ccbaf55f9f6cd8eb3d1ccb.zip
|
|
|
42,019,565
|
5.1b3
|
9B5141a
|
9B5127c
|
e718832f57845f146010545386f1949a1353999b.zip
|
Beta
|
|
?
|
5.1
|
9B176
|
9A334
|
8af6942d8211bb00fb32b93aafeeba1c4b8e1e32.zip
|
Release
|
|
183,616,163
|
5.1
|
9B176
|
9A405
|
62866fb35adf18d8a0ffbdf0fa340b95297c90d3.zip
|
Release
|
|
183,366,472
|