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		GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 4 / iPhone 4S
iPhone 4 error 21

iPhone 4 / iPhone 4S iPhone 4 / 4S

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03-22-2014, 19:02	#1 (permalink)
mfeliu07 No Life Poster Join Date: Dec 2006 Location: Cuba Age: 56 Posts: 1,073 Member: 517318 Status: Offline Thanks Meter: 88	iPhone 4 error 21 Hello I have problems to get an iPhone 4 on the block constantly rebooting, only plugged into the PC, when I unplug the USB off. I've tried every remedy, modifying the Host, changing cable, battery PC, etc. In all cases I get error 21. there any explanation for this error? regards mfeliu07

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