Answer to: What does error 2001 on iTunes mean?To anybody else with the same problem: I got a phone stuck in a reboot loop. It would get to the Apple logo then restart. I tried putting it in DFU mode to restore in iTunes and it gave me an error 2001 and occasionally and error 2006. The solution was to change the battery! £5 battery on eBay and now it's working again. Got me an iPhone 4 for a bargain now.