Cannot update and restore my iphone 4

i try couple times but ived got errror -48 during back uo and error

have you tried a hard reset?
press and hold the top power button and the home button at the same time for about 6seconds until you se an apple apear, then release both. Your phone should then boot up.
if that doesnt work,
http://osxdaily.com/2010/06/24/iphone-dfu-mode-explained-and-how-to-enter-dfu-mo de-on-your-iphone/

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  • HT201210 i have this error ''the iphone *** cannot be updatet at this time because the iphone software update server could not be countacted ore is temporarily unavailable'' i have 2-3 days tha  try to update or restore the iphone but tha same again :/ pl

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    Try updating directly on the device, via iTunes on the computer, and iTunes on a different computer.
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