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

iPhone 4 / iPhone 4S iPhone 4 / 4S

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Old 06-28-2016, 07:24   #1 (permalink)
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Iphone 4 Update Erro 2


please help me to solve my problem, iPhone 4 come with for some apps not working, i try to update with iTunes but its showing error occurred 2,

have try to change usb cable port and pc but stull same problem

also i have try to flash with 3U tool but its stoped at 80% (basband) error (-1) also i have try to dfu mode tis show Verifiy AMRError need soluton kindly help me to solve my problem
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Old 06-28-2016, 07:30   #2 (permalink)
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Error 2, 4 (or -4), 6, 1000, and 9006

Follow the steps to troubleshoot security software. Often, uninstalling third-party security software will resolve these errors.
There may be third-party software that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your registry. An incorrectly set default packet size can cause these errors. Contact the manufacturer of the software that installed the packet size modification for assistance or follow this article by Microsoft: How to reset Internet Protocol (TCP/IP).
Verify that access to ports 80 and 443 are allowed on your network.
Verify that communication to albert.apple.com or phobos.apple.com isn't blocked by a firewall or other Internet security setting.
Discard the .ipsw file, open iTunes and attempt to download the update again. See the steps under "Advanced steps > Rename, move, or delete the iOS software file (.ipsw)" below for file locations.
Restore your device while connected to a different network.
Restore using a different computer.
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