You may have encountered an error saying iPhone update error 3259. There are a number of steps you can take to resolve this issue. We will return to this shortly. Everything that causes Apple error 3259 has to do with connection voltage. They may not be able to help you connect to iTunes due to poor internet connection or outdated framework settings. I would say that your computer may also have security software installed that conflicts with iTunes and prevents you from connecting to the service.
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How do I fix connection timeout iOS?
Disable firewall and antivirus. This is usually the easiest solution and is usually the first thing you should try.Uninstall and reinstall iTunes.Flush the DNS cache.Manually download the iOS update.iTunes error 9808.