OTA Updates/iPhone/5.1

This is a list of OTA updates for iPhone on iOS 5.1. For more iPhone OTA updates, see OTA Updates/iPhone. For all firmware, see Firmware.

iPhone 3GS

Version	Build	Prerequisite Version	Prerequisite Build	Release Date	OTA Download URL	File Size
5.1	9B169	5.0	9A334	7 February 2012 (2012-02-07)	1d274009445764ad32f3971d8b95d8196b74301e.zip	110,881,182
		5.0.1	9A405		a4ebb0cacb3971456b26f518ffb4aeddb6dfcaff.zip	110,774,103
	9B172	5.0	9A334	13 February 2012 (2012-02-13)	a59a44947b0c892987f9cc38892d8d159918682d.zip	110,874,712
		5.0.1	9A405		c5eff4c14de6f7c47bb6ef56c8aeed53822acd39.zip	110,748,566
	9B174	5.0	9A334	13 February 2012 (2012-02-13)	d2c7bd6f6d9ee4e3c0c8f92ddbd44e54b900cdec.zip	111,061,273
		5.0.1	9A405		6bd7b176c41b2fd44371515cb4fc7d8f2138b424.zip	110,839,646
	9B176	5.0	9A334	7 March 2012 (2012-03-07)	e40288e178845de42cf0fa18365bdcb5fc4492e7.zip	111,010,992
		5.0.1	9A405		0e0e6444cae79c3c809107eb61c3ee6c75c10c2f.zip	110,916,945

iPhone 4

iPhone3,1

Version	Build	Prerequisite Version	Prerequisite Build	Release Date	OTA Download URL	File Size
5.1	9B169	5.0	9A334	7 February 2012 (2012-02-07)	17c4483cd87b20bc1a66e9f0e9ab62d7aa14c853.zip	186,038,670
		5.0.1	9A405		c6030ffc53c55b00084b0a4be15969cef0fb5781.zip	186,060,659
	9B172	5.0	9A334	13 February 2012 (2012-02-13)	04ec55edb9b76012edb1120f3e81afe9a5e24633.zip	186,136,113
		5.0.1	9A405		bb4353610c2f560d8e1a63d3a3009a1499954853.zip	186,003,005
	9B174	5.0	9A334	13 February 2012 (2012-02-13)	0835097eab16b6c5c95543c42b401d6f8895a769.zip	186,121,134
		5.0.1	9A405		23f0aa43a9d9638c8fdc6277dabc5185e8d0d832.zip	185,943,345
	9B176	5.0	9A334	7 March 2012 (2012-03-07)	03e5a74f68e6d997820fce4584d4c4b248b7a311.zip	186,113,559
		5.0.1	9A405		4df53ad9e8cbf24a021ea6619654dec4c15fe942.zip	186,154,575

iPhone3,3

Version	Build	Prerequisite Version	Prerequisite Build	Release Date	OTA Download URL	File Size
5.1	9B169	5.0	9A334	6 February 2012 (2012-02-06)	b97b40d718363c90c1fe88842c6e4bfd40e88ec5.zip	195,515,730
		5.0.1	9A405		0ff36f18dc44611fd95814d5677487867fa93319.zip	195,450,449
	9B172	5.0	9A334	13 February 2012 (2012-02-13)	01497e20260bd4af17f9118ab8ffc74f97372665.zip	195,703,068
		5.0.1	9A405		dbcecd11e96197607d76cd22865df02d0da37d27.zip	195,710,943
	9B174	5.0	9A334	13 February 2012 (2012-02-13)	12737392a9bc802605d745c07dc854a51030bf50.zip	195,650,505
		5.0.1	9A405		11d36bda63e0b262584d5802db468acac7d72f1e.zip	195,542,923
	9B176	5.0	9A334	7 March 2012 (2012-03-07)	4c34ed79631d24a81dcd56f99a2fe8fe6ba1b506.zip	195,682,427
		5.0.1	9A405		3225fd68ea19c195181ec755e58797f881145454.zip	195,532,946

iPhone 4S

Version	Build	Prerequisite Version	Prerequisite Build	Release Date	OTA Download URL	File Size
5.1	9B169	5.0	9A334	7 February 2012 (2012-02-07)	dbaea9dba381a79f62bfd4f31dc0d9caded7e720.zip	198,404,456
		5.0.1	9A405		958e5e283d7730bc5b9647ac6eab3d71a98d19cd.zip	198,292,256
			9A406		a20839a12ee405a57fb01b4939b9945bf563a94d.zip	198,370,057
	9B172	5.0	9A334	13 February 2012 (2012-02-13)	c2786583b6b039e9ee89c2e8ffeb65b4be98a6aa.zip	198,521,626
		5.0.1	9A405		b5b984bdd44b4b7ab5912742039720f1a4f4e27a.zip	198,495,577
			9A406		823fe334c7d87e6391b77ba7548589dbf81a52fa.zip	198,364,072
	9B174	5.0	9A334	13 February 2012 (2012-02-13)	260f7bb7435a3d26976f45ccaf2175e51a90850b.zip	198,559,725
		5.0.1	9A405		0e1013f268d068a801d66596fe7180eb65748b53.zip	198,350,606
			9A406		3996747b7b435db125f03973a96329c1399a3bd3.zip	198,284,175
	9B176	5.0	9A334	7 March 2012 (2012-03-07)	b0d7d7aab1c40aa16961944d0610abf0d1e6697b.zip	198,686,382
		5.0.1	9A405		216f18afd771da4038d6b34a215bd9d71da60cfc.zip	198,439,586
			9A406		16e97f26c4e2ef591cf0efaf764970fd4148bc7c.zip	198,565,677
	9B179	5.0	9A334	7 March 2012 (2012-03-07)	bdf35bb991b25d0ecc0e2cfb2d59f99d63082c09.zip	198,658,723
		5.0.1	9A405		a37da9fd18dd0a40d46192b63ed5069fa4e852c9.zip	198,459,428
			9A406		94fbce740b4e3f59f047ce5369c7afb5f806e249.zip	198,383,965