iOS Firmwares Download [Direct link]

3.1.3 (2G): iPhone1,1_3.1.3_7E18_Restore.ipsw

3.1.3 (3G): iPhone1,2_3.1.3_7E18_Restore.ipsw

3.1.3 (3GS): iPhone2,1_3.1.3_7E18_Restore.ipsw

4.0.0 (3G): iPhone1,2_4.0_8A293_Restore.ipsw

4.0.0 (3GS): iPhone2,1_4.0_8A293_Restore.ipsw

4.0.0 (4): iPhone3,1_4.0_8A293_Restore.ipsw

4.0.1 (3G): iPhone1,2_4.0.1_8A306_Restore.ipsw

4.0.1 (3GS): iPhone2,1_4.0.1_8A306_Restore.ipsw

4.0.1 (4): iPhone3,1_4.0.1_8A306_Restore.ipsw

4.0.2 (3G): iPhone1,2_4.0.2_8A400_Restore.ipsw

4.0.2 (3GS): iPhone2,1_4.0.2_8A400_Restore.ipsw

4.0.2 (4): iPhone3,1_4.0.2_8A400_Restore.ipsw

4.1.0 (3G): iPhone1,2_4.1_8B117_Restore.ipsw

4.1.0 (3GS): iPhone2,1_4.1_8B117_Restore.ipsw

4.1.0 (4): iPhone3,1_4.1_8B117_Restore.ipsw

4.2.1 (3G): iPhone1,2_4.2.1_8C148_Restore.ipsw

4.2.1 (3GS): iPhone2,1_4.2.1_8C148a_Restore.ipsw

4.2.1 (4): iPhone3,1_4.2.1_8C148_Restore.ipsw

4.3.3 (3GS): iPhone2,1_4.3.3_8J2_Restore.ipsw

4.3.3 (4 GSM): iPhone3,1_4.3.3_8J2_Restore.ipsw

4.3.5 (3GS): iPhone2,1_4.3.5_8L1_Restore.ipsw

4.3.5 (4 GSM): iPhone3,1_4.3.5_8L1_Restore.ipsw

5.0 (3GS): iPhone2,1_5.0_9A334_Restore.ipsw

5.0 (4 GSM): iPhone3,1_5.0_9A334_Restore.ipsw

5.0 (4 CDMA): iPhone3,3_5.0_9A334_Restore.ipsw

5.0 (4S): iPhone4,1_5.0_9A334_Restore.ipsw

5.0.1 (3GS): iPhone2,1_5.0.1_9A405_Restore.ipsw

5.0.1 (4 GSM): iPhone3,1_5.0.1_9A405_Restore.ipsw

5.0.1 (4 CDMA): iPhone3,3_5.0.1_9A405_Restore.ipsw

5.0.1 (4S): iPhone4,1_5.0.1_9A405_Restore.ipsw

5.0.1 (4S) [9A406]: iPhone4,1_5.0.1_9A406_Restore.ipsw

5.1.0 (3GS): iPhone2,1_5.1_9B176_Restore.ipsw

5.1.0 (4 GSM): iPhone3,1_5.1_9B176_Restore.ipsw

5.1.0 (4 CDMA):iPhone3,3_5.1_9B176_Restore.ipsw

5.1.0 (4S): iPhone4,1_5.1_9B179_Restore.ipsw