iPhone v4.0 Upgrade Failures

High Tech House Calls has seen quite a lot of v4.0 upgrade failures on iPhones. Here are some facts on the upgrade process:

•  The process is a lengthy one and can take as long as 6 hours.
• It is NOT an unattended process. You must answer questions during the upgrade. Therefore, starting the process before going to bed and expecting it to be complete when you wake up is not going to happen.
• How do you tell if the upgrade was successful? Go to Settings, then General and then About. If the version displayed is not 4.0, the upgrade did not succeed.