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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 2 / iPhone 3G / iPhone 3GS

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Old 07-23-2011, 18:37   #1 (permalink)
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u can downgrade 3gs 4.3.4 to 4.2.1 its not signed


i just flashed my 3gs 4.3.4 to 4.2.1 and it worked
even with err 1015
just to let all know mybe thats help
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Old 07-23-2011, 18:39   #2 (permalink)
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yeah but how u gonna fix error "1015" in 4.2.1 tinyumbrella only supports 4.1 and below...
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Originally Posted by KISHOMETO View Post
i just flashed my 3gs 4.3.4 to 4.2.1 and it worked
even with err 1015
just to let all know mybe thats help
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Old 07-23-2011, 21:05   #3 (permalink)
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iphone 4 4.3.4 any idea to down 4.3.3 without SHSH file??
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