This is the iPhone OS system the iPhone runs. Latest Apple download links can be found here.
Comparison of firmware versions
| Version
 | 
Build
 | 
Baseband
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
Can be unlocked OTB?
 | 
File Size
 | 
| 1.0
 | 
Alpine 1A420
 | 
03.06.01_G
 | 
iphoneproto.zip
 | 
6e798e906c6590a7521ef89b731569be6d05b3aa
 | 
Prototype; macrumors
 | 
Yes
 | 
No
 | 
109,813,128
 | 
| 1.0.0
 | 
Heavenly 1A543a
 | 
03.12.06_G
 | 
iPhone1,1_1.0_1A543a_Restore.ipsw
 | 
fb8bb3ee2e9a997affbb97868599f2995c78209c
 | 
Initial US shipment.
 | 
Yes
 | 
Yes
 | 
95,604,348
 | 
| 1.0.1
 | 
Heavenly 1C25
 | 
03.12.06_G
 | 
iPhone1,1_1.0.1_1C25_Restore.ipsw
 | 
a00b85a7a55d62a94be5fbf5effbc42fd63f3097
 | 
 | 
Yes
 | 
Yes
 | 
95,627,958
 | 
| 1.0.2
 | 
Heavenly 1C28
 | 
03.14.08_G
 | 
iPhone1,1_1.0.2_1C28_Restore.ipsw
 | 
7f5c0ff1f84a0202b75a55c3fcb362e415334d1e
 | 
 | 
Yes
 | 
Yes
 | 
95,627,324
 | 
| 1.1.1
 | 
Snowbird 3A109a
 | 
04.01.13_G
 | 
iPhone1,1_1.1.1_3A109a_Restore.ipsw
 | 
d441dd1c71ce18f25d8fc4faa71c1e6eaa02d02c
 | 
 | 
Yes
 | 
Yes
 | 
159,668,150
 | 
| 1.1.2
 | 
Oktoberfest 3B48b
 | 
04.02.13_G
 | 
iPhone1,1_1.1.2_3B48b_Restore.ipsw
 | 
797c02e7d660940e8d9a16cc7229ccf3f67dd8b1
 | 
Initial Euro shipment.
 | 
Yes
 | 
Yes
 | 
167,927,501
 | 
| 1.1.3
 | 
Little Bear 4A93
 | 
04.03.13_G
 | 
iPhone1,1_1.1.3_4A93_Restore.ipsw
 | 
b3dec7580bd00dc4faf28449d9618ef40aeacc96
 | 
 | 
Yes
 | 
Yes
 | 
169,950,551
 | 
| 1.1.4
 | 
Little Bear 4A102
 | 
04.04.05_G
 | 
iPhone1,1_1.1.4_4A102_Restore.ipsw
 | 
000811bac096011b50ebf6ec1ec2285b62fda4cb
 | 
 | 
Yes
 | 
Yes
 | 
169,946,442
 | 
| 2.0
 | 
Big Bear 5A347
 | 
04.05.04_G
 | 
iPhone1,1_2.0_5A347_Restore.ipsw
 | 
9c510a3cfce789fa5f92a8f763c231bac82ff6d4
 | 
 | 
Yes
 | 
Yes
 | 
228,768,637
 | 
| 2.0.1
 | 
Big Bear 5B108
 | 
04.05.04_G
 | 
iPhone1,1_2.0.1_5B108_Restore.ipsw
 | 
61de6a2bd6ceddc9ecabad1671b91a59b3824bc4
 | 
 | 
Yes
 | 
Yes
 | 
254,048,068
 | 
| 2.0.2
 | 
Big Bear 5C1
 | 
04.05.04_G
 | 
iPhone1,1_2.0.2_5C1_Restore.ipsw
 | 
b84b57bea919bdc720287ec908c1378e7d7b5e1b
 | 
 | 
Yes
 | 
Yes
 | 
253,589,000
 | 
| 2.1
 | 
Sugar Bowl 5F136
 | 
04.05.04_G
 | 
iPhone1,1_2.1_5F136_Restore.ipsw
 | 
353b7745767b85932e14e262e69463620939bdf7
 | 
 | 
Yes
 | 
Yes
 | 
242,171,241
 | 
| 2.2
 | 
Timberline 5G77
 | 
04.05.04_G
 | 
iPhone1,1_2.2_5G77_Restore.ipsw
 | 
cbfc6ff886ce89868a55547b9fb980dbf92e6418
 | 
 | 
Yes
 | 
Yes
 | 
257,576,980
 | 
| 2.2.1
 | 
SUTimberline 5H11
 | 
04.05.04_G
 | 
iPhone1,1_2.2.1_5H11_Restore.ipsw
 | 
43b95ebe1e51f8d30eae916053396595c08440d3
 | 
 | 
Yes
 | 
Yes
 | 
257,593,705
 | 
| 3.0
 | 
Kirkwood 7A341
 | 
04.05.04_G
 | 
iPhone1,1_3.0_7A341_Restore.ipsw
 | 
2afd3f8ede17390737f508473ed205506a0bd23f
 | 
 | 
Yes
 | 
Yes
 | 
240,394,111
 | 
| 3.0.1
 | 
Kirkwood 7A400
 | 
04.05.04_G
 | 
iPhone1,1_3.0.1_7A400_Restore.ipsw
 | 
34c391fbbc7b31b159372766de39ce5c9cc26ebb
 | 
 | 
Yes
 | 
Yes
 | 
240,439,502
 | 
| 3.1
 | 
Northstar 7C144
 | 
04.05.04_G
 | 
iPhone1,1_3.1_7C144_Restore.ipsw
 | 
b7b5f436f81c6f855410e8b44a3d432ccaacd6fc
 | 
 | 
Yes
 | 
Yes
 | 
252,536,460
 | 
| 3.1.2
 | 
7D11
 | 
??
 | 
iPhone1,1_3.1.2_7D11_Restore.ipsw
 | 
??
 | 
 | 
Probably, not yet released
 | 
Yes
 | 
252,515,888
 | 
| Version
 | 
Build
 | 
Baseband
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
Can be unlocked OTB?
 | 
File Size
 | 
| 2.0
 | 
Big Bear 5A345
 | 
01.45.00
 | 
No download available
 | 
 | 
Initial iPhone 3G shipment.
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
 | 
| 2.0
 | 
Big Bear 5A347
 | 
01.45.00
 | 
iPhone1,2_2.0_5A347_Restore.ipsw
 | 
af9506ca0034e462674f9f59c5406f159eaf9fc1
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
235,957,125
 | 
| 2.0.1
 | 
Big Bear 5B108
 | 
01.48.02
 | 
iPhone1,2_2.0.1_5B108_Restore.ipsw
 | 
e81c7ac7e334a3e9d81b3b47894bfaa1ec495482
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
261,224,227
 | 
| 2.0.2
 | 
Big Bear 5C1
 | 
02.08.01
 | 
iPhone1,2_2.0.2_5C1_Restore.ipsw
 | 
bef7fef954293046420fbcf947379839178a195b
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
260,761,030
 | 
| 2.1
 | 
Sugar Bowl 5F136
 | 
02.11.07
 | 
iPhone1,2_2.1_5F136_Restore.ipsw
 | 
c6957dcbf2a95ccfd6dce374a727b1b7700a9043
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
249,341,655
 | 
| 2.2
 | 
Timberline 5G77
 | 
02.28.00
 | 
iPhone1,2_2.2_5G77_Restore.ipsw
 | 
f67f8b2b842428bf89456cda0c2d5cf954d111a4
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
258,342,348
 | 
| 2.2.1
 | 
SUTimberline 5H11
 | 
02.30.03
 | 
iPhone1,2_2.2.1_5H11_Restore.ipsw
 | 
e0098e6fab5c90b59e067e03ae3ccd4a7cd0f39c
 | 
 | 
Yes
 | 
Yes (Upgrade to 04.26.08)
 | 
258,359,073
 | 
| 3.0
 | 
Kirkwood 7A341
 | 
04.26.08
 | 
iPhone1,2_3.0_7A341_Restore.ipsw
 | 
94f1fb43de12bff0f168ce690b7e794cc6220ae3
 | 
 | 
Yes
 | 
Yes (with ultrasn0w)
 | 
241,229,233
 | 
| 3.0.1
 | 
Kirkwood 7A400
 | 
04.26.08
 | 
iPhone1,2_3.0.1_7A400_Restore.ipsw
 | 
a148ff39fa4dea499e7a9dd007b63e90c4f56666
 | 
 | 
Yes
 | 
Yes
 | 
241,274,617
 | 
| 3.1
 | 
Northstar 7C144
 | 
05.11.07
 | 
iPhone1,2_3.1_7C144_Restore.ipsw
 | 
9b3b3c148170b012012278efda9ff5c38282d559
 | 
 | 
Yes
 | 
No (Though you can stay at 04.26.08)
 | 
253,361,339
 | 
| 3.1.2
 | 
Northstar 7D11
 | 
05.11.07
 | 
iPhone1,2_3.1.2_7D11_Restore.ipsw
 | 
b1a6ab2771bb5da372ba75a8fa3e1d72b71359d0
 | 
 | 
Probably, not yet released
 | 
No
 | 
253,340,786
 | 
| Version
 | 
Build
 | 
Baseband
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
Can be unlocked OTB?
 | 
File Size
 | 
| 3.0
 | 
Kirkwood 7A341
 | 
04.26.08
 | 
iPhone2,1_3.0_7A341_Restore.ipsw
 | 
d8534408c8679c830fd0c4e36ef9762c11ef73df
 | 
Initial shipment.
 | 
Yes
 | 
Yes (with ultrasn0w or purplesn0w)
 | 
312,292,933
 | 
| 3.0.1
 | 
Kirkwood 7A400
 | 
04.26.08
 | 
iPhone2,1_3.0.1_7A400_Restore.ipsw
 | 
30006575af931e3da0521febace005152cdb8853
 | 
 | 
Yes
 | 
Yes
 | 
312,330,244
 | 
| 3.1
 | 
Northstar 7C144
 | 
05.11.07
 | 
iPhone2,1_3.1_7C144_Restore.ipsw
 | 
527c74f87588afa1d69c1e2c08eedc88f113013a
 | 
Installed on phones produced week 37.
 | 
Only if previously jailbroken on 3.0/3.0.1
 | 
No (Though you can stay at 04.26.08)
 | 
321,011,474
 | 
| 3.1.2
 | 
Northstar 7D11
 | 
05.11.07
 | 
iPhone2,1_3.1.2_7D11_Restore.ipsw
 | 
??
 | 
 | 
No
 | 
No
 | 
321,015,700
 | 
| Version
 | 
Build
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
File Size
 | 
| 1.1.0
 | 
Snowbird 3A100a
 | 
No download available
 | 
 | 
Initial shipment.
 | 
Yes
 | 
 | 
| 1.1.0
 | 
Snowbird 3A101a
 | 
iPod1,1_1.1_3A101a_Restore.ipsw
 | 
9b0d83c7f8b4328174a3f31e0e93f60e591ae143
 | 
 | 
Yes
 | 
157,890,186
 | 
| 1.1.1
 | 
Snowbird 3A110a
 | 
iPod1,1_1.1.1_3A110a_Restore.ipsw
 | 
84bbc6ea8bf29745195bc9926c1874f7c2a36f32
 | 
 | 
Yes
 | 
157,906,686
 | 
| 1.1.2
 | 
Oktoberfest 3B48b
 | 
iPod1,1_1.1.2_3B48b_Restore.ipsw
 | 
108d8ffe9ea75e61cd5e57170ad388b7fa00d923
 | 
 | 
Yes
 | 
165,567,897
 | 
| 1.1.3
 | 
Little Bear 4A93
 | 
iPod1,1_1.1.3_4A93_Restore.ipsw
 | 
8dca23eec69d5ae58fbf3d4a23276e46cbb2e3c6
 | 
 | 
Yes
 | 
173,511,411
 | 
| 1.1.4
 | 
Little Bear 4A102
 | 
iPod1,1_1.1.4_4A102_Restore.ipsw
 | 
c148d1eb1c979bb6434175411d4a372103a4fdd2
 | 
 | 
Yes
 | 
173,519,589
 | 
| 1.1.5
 | 
Little Bear 4B1
 | 
iPod1,1_1.1.5_4B1_Restore.ipsw
 | 
1b818911316e4248ee01d3ec67f9d39afc3db240
 | 
 | 
Yes
 | 
173,519,637
 | 
| 2.0
 | 
Big Bear 5A347
 | 
Download Link Prohibited
 | 
ae82798e85f9953b0f4798bad36187cb020c9d22
 | 
2.0+ is a paid upgrade series
 | 
Yes
 | 
233,409,573
 | 
| 2.0.1
 | 
Big Bear 5B108
 | 
Download Link Prohibited
 | 
a81b6e7af4b85ef436d047f9da57c0f694d8964a
 | 
 | 
Yes
 | 
258,660,321
 | 
| 2.0.2
 | 
Big Bear 5C1
 | 
Download Link Prohibited
 | 
c8b6f9fefa3f3777c56285dfe4c735b1e08a81a2
 | 
 | 
Yes
 | 
258,201,218
 | 
| 2.1
 | 
Sugar Bowl 5F137
 | 
Download Link Prohibited
 | 
fc7f6d0972927df502ffca47438ca75dcccffaf3
 | 
 | 
Yes
 | 
251,155,156
 | 
| 2.2
 | 
Timberline 5G77
 | 
Download Link Prohibited
 | 
081a7de363230fb38d0ce092cbbe42f2a50c8a5f
 | 
 | 
Yes
 | 
260,186,851
 | 
| 2.2.1
 | 
SUTimberline 5H11
 | 
Download Link Prohibited
 | 
fc69be9e421bc0630567184506ab771f6b7ef68b
 | 
 | 
Yes
 | 
260,166,688
 | 
| 3.0
 | 
Kirkwood 7A341
 | 
Download Link Prohibited
 | 
dff2bd14931225908a360fb8e60a336f17d2dd6d
 | 
3.0+ is a paid upgrade series
 | 
Yes
 | 
242,458,552
 | 
| 3.1.1
 | 
Northstar 7C145
 | 
Download Link Prohibited
 | 
c6270780c166db4c9f4f0a7fa945754a1f9fe7e8
 | 
 | 
Yes
 | 
249,755,862
 | 
| 3.1.2
 | 
Northstar 7D11
 | 
Download Link Prohibited
 | 
7367dd9ba58a3b9777307368a0128e696fdfc9a6
 | 
 | 
Probably, not yet released
 | 
249,780,497
 | 
| Version
 | 
Build
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
File Size
 | 
| 2.1.1
 | 
Sugar Bowl 5F138
 | 
iPod2,1_2.1.1_5F138_Restore.ipsw
 | 
c3c700be49ad227d1152188e7c1e46b8958fd1e4
 | 
Initial shipment.
 | 
Yes
 | 
282,083,944
 | 
| 2.2
 | 
Timberline 5G77a
 | 
iPod2,1_2.2_5G77a_Restore.ipsw
 | 
34a0a489605f34d6cc6c9954edcaaf9a050deedc
 | 
 | 
Yes
 | 
291,123,491
 | 
| 2.2.1
 | 
SUTimberline 5H11a
 | 
iPod2,1_2.2.1_5H11a_Restore.ipsw
 | 
9af5625ea34acdd8abeb6fce71a72651d0c815d5
 | 
 | 
Yes
 | 
291,140,244
 | 
| 3.0
 | 
Kirkwood 7A341
 | 
Download Link Prohibited
 | 
0f7fc76d9b9aa826b5ab14be9821a315d3d9dc42
 | 
3.0+ is a paid upgrade series
 | 
Yes
 | 
270,315,364
 | 
| 3.1.1
 | 
Northstar 7C145
 | 
Download Link Prohibited
 | 
e0d8800a4fc7cc5be6976ddbceb43c2d2a7120d7
 | 
 | 
Only if previously jailbroken on 3.0
 | 
277,753,989
 | 
| 3.1.2
 | 
Northstar 7D11
 | 
Download Link Prohibited
 | 
??
 | 
 | 
No
 | 
277,794,671
 | 
| Version
 | 
Build
 | 
IPSW Download URL
 | 
SHA1 Hash
 | 
Comments
 | 
Can be jailbroken?
 | 
File Size
 | 
| 3.1.1
 | 
Northstar 7C145
 | 
iPod3,1_3.1.1_7C145_Restore.ipsw
 | 
a3eddbe2cf77858bae7087dc8b2035f0d3097e57
 | 
Initial shipment.
 | 
Probably, not yet released
 | 
311,702,789
 | 
| 3.1.1
 | 
Northstar 7C146
 | 
iPod3,1_3.1.1_7C146_Restore.ipsw
 | 
f66a7286b261137f25ddbbd84047f9a7ea181904
 | 
 | 
Probably, not yet released
 | 
311,690,768
 | 
| 3.1.2
 | 
Northstar 7D11
 | 
iPod3,1_3.1.2_7D11_Restore.ipsw
 | 
??
 | 
 | 
No
 | 
311,740,034
 | 
See also
Resources