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MDM6610 in an iPhone 4S

The Qualcomm MDM6610 is the baseband chip used in the iPhone 4S.

Baseband Firmware

The firmware for the baseband chip comes in Trek-X.X.XX.Release.bbfw files (with X being the version). The BBFW file is just a renamed standard ZIP archive and contains a couple of .mbn files which are all digitally signed with a certificate from Qualcomm. Qualcomm's Senior Engineer Shital Mehta[dead link] is involved with the programming of the firmware. The amss.mbn file is an ELF file:

Mac OS X file command output

file Trek-1.0.11.Release/amss.mbn 
/Trek-1.0.11.Release/amss.mbn: ELF 32-bit LSB executable, ARM, version 1, statically linked, corrupted section header size

Known Firmware Versions

iPhone 4S

Baseband Version Build
1.0.00 5.0 9A2306f
1.0.11 9A334
1.0.12 5.0.1 beta 9A402
1.0.13 5.0.1 beta 2 9A404
5.0.1 9A405
1.0.14 9A406
1.2.01-1 5.1 beta 9B5117b
1.4.00 5.1 beta 2 9B5127
9B5127c
1.5.04 5.1 beta 3 9B5141a
2.0.2 5.1 beta 4 9B155
2.0.9 5.1 GM 9B174
2.0.7 5.1 9B169
2.0.9 9B172
9B176
2.0.10 9B179
2.0.12 5.1.1 9B206
2.8.01 6.0 beta 10A5316k
2.8.04 6.0 beta 2 10A5338d
2.8.07 6.0 beta 3 10A5355d
3.0.00 6.0 beta 4 10A5376e
3.0.04 6.0 GM 10A403
6.0 10A402
10A403
6.0.1 10A523
6.1 beta 10B5095f
3.2.00 6.1 beta 2 10B5105c
3.3.00 6.1 beta 3 10B5117b
3.3.01 6.1 beta 4 10B5126b
3.4.01 6.1 GM 10B141
10B142
6.1 10B137
10B141
10B142
6.1.1 beta 10B311
3.4.02 6.1.1 10B145
6.1.2 10B146
3.4.01 6.1.3 beta 2 10B318
3.4.03 6.1.3 10B327
10B329
4.3.01 7.0 beta 11A4372q
7.0 beta 2 11A4400f
4.4.00 7.0 beta 3 11A4414c
11A4414e
4.4.03 7.0 beta 4 11A4435d
7.0 beta 5 11A4449a
7.0 beta 6 11A4449d
5.0.00 7.0 GM 11A465
7.0
7.0.2 11A501
5.0.02 7.0.3 11B508
11B511
7.0.4 11B553
11B554a
7.0.6 11B651
5.1.00 7.1 beta 11D5099e
7.1 beta 2 11D5115d
7.1 beta 3 11D5127c
7.1 beta 4 11D5134c
7.1 beta 5 11D5145e
5.2.00 7.1 GM 11D167
7.1
7.1.1 11D201
7.1.2 11D257
5.2.01 8.0 beta 12A4265u
5.3.01 8.0 beta 2 12A4297e
5.3.02 8.0 beta 3 12A4318c
8.0 beta 4 12A4331d
8.0 beta 5 12A4345d
5.4.00 8.0 GM 12A365
8.0
8.0.1 12A402
8.0.2 12A405
5.3.02 8.1 beta 12B401
5.4.00 8.1 beta 2 12B407
8.1 12B410
12B411
8.1.1 beta 12B432
8.1.1 12B435
8.1.2 12B440
8.1.3 12B466
8.2 beta 12D436
8.2 beta 2 12D445d
8.2 beta 3 12D5452a
8.2 beta 4 12D5461b
8.2 beta 5 12D5480a
8.2 12D508
5.3.02 8.3 beta 12F5027d
8.3 beta 2 12F5037c
8.3 beta 3 12F5047f
5.4.00 8.3 beta 4 12F61
8.3 12F69
12F70
5.3.02 8.4 beta 12H4074d
8.4 beta 2 12H4086d
8.4 beta 3 12H4098c
5.3.03 8.4 beta 4 12H4125a
5.5.00 8.4 12H143
8.4.1 beta 12H304
8.4.1 beta 2 12H318
8.4.1 12H321
5.3.02 9.0 beta 13A4254v
5.3.03 9.0 beta 2 13A4280e
9.0 beta 3 13A4293f
13A4293g
5.3.04 9.0 beta 4 13A4305g
9.0 beta 5 13A4325c
6.0.00 9.0 GM 13A340
9.0 13A344
9.0.1 13A404
9.0.2 13A452
5.3.04 9.1 beta 13B5110e
9.1 beta 2 13B5119e
6.0.00 9.1 beta 3 13B5130b
9.1 beta 4 13B136
9.1 beta 5 13B137
9.1 13B143
5.3.03 9.2 beta 13C5055d
9.2 beta 2 13C5060d
6.0.00 9.2 beta 3 13C71
9.2 beta 4 13C75
9.2
9.2.1 beta 13D11
9.2.1 beta 2 13D14
9.2.1 13D15
5.3.04 9.3 beta 13E5181d
9.3 beta 1.1 13E5181f
9.3 beta 2 13E5191d
9.3 beta 3 13E5200d
9.3 beta 4 13E5214d
6.0.00 9.3 beta 5 13E5225a
9.3 beta 6 13E5231a
9.3 beta 7 13E5233a
9.3 13E233
13E237
9.3.1 13E238
9.3.2 beta 13F51a
9.3.2 beta 2 13F61
9.3.2 beta 3 13F65
9.3.2 beta 4 13F68
9.3.2 13F69
9.3.3 beta 13G12
9.3.3 beta 2 13G21
9.3.3 beta 3 13G29
9.3.3 beta 4 13G33
9.3.3 beta 5 13G34
9.3.3
9.3.4 13G35
9.3.5 13G36
6.7.00 9.3.6 13G37

External Resources