Put simply. I have an old Iphone 3G which is locked to vodafone. I tried in both of their shops to have them unlock it and neither of them could. So I decided I would use a couple youtube tutorials to try and figure out how I could do it myself.
Downloaded redsn0w and the firmware for 4.2.1. Followed the steps the video told me to follow, this didn't work, although I got as far as having the pineapple logo appear on the screen on the iphone. However after this I tried to turn the phone on and just got the symbol saying it needed to be connected to Itunes. So I did that ran the recovery or restore thing and got errors 1015 and 3914 which I have tried to remove to no avail using the recovery fix on redsn0w and then by going into computer>system(C:)>windows>system32>drivers>etc to edit the hosts file in notepad as another video suggested. However as I dont have admin rights I couldnt save the edit required and also cannot work out how to give myself permission to do so.
Downloaded redsn0w and the firmware for 4.2.1. Followed the steps the video told me to follow, this didn't work, although I got as far as having the pineapple logo appear on the screen on the iphone. However after this I tried to turn the phone on and just got the symbol saying it needed to be connected to Itunes. So I did that ran the recovery or restore thing and got errors 1015 and 3914 which I have tried to remove to no avail using the recovery fix on redsn0w and then by going into computer>system(C:)>windows>system32>drivers>etc to edit the hosts file in notepad as another video suggested. However as I dont have admin rights I couldnt save the edit required and also cannot work out how to give myself permission to do so.