For Apple ID and password issue:
When you activate your Apple device at the beginning, Apple forces you to sign up Apple ID and password. Once, people made them they may forget the ID or password after long time. If your device has a problem like software issue, the one way is to restore the OS from iTunes. However, on this stage, iTunes ask you to enter your Apple ID and password. If you forgot your password, there is no way to save your device. Several hundred value device become useless just because you cannot remember the Apple ID password. This is inhuman. Apple says this is to protect users. However, ironically, we observed it hurts users in many cases. If you have proof that the device belongs you, like receipt, you can bring your device to Apple store and ask them to help you. But, if it is not the first hand goods, it would be problematic. Therefore, keep record for your Apple ID password in a safe place when you create it and make sure that you can use it when you need it. For the case of you buy or receive Apple device as a gift, please ask the Apple ID and password of previous owner to prevent the case of difficult situation.
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