Unable to unlock! This is the account you need to download software games. You'd better create one yourself. Generally, the seller will help you install something, which is his account. When downloading, you will use a password, so you'd better create one yourself. IPHONE4 does not allow two accounts to download software on the same machine. So before you download it yourself, you should delete all the software installed by the seller, and then you can install what you downloaded from your own account. The steps to apply for an account are as follows: you download an itunes first, and then choose a free software to download. You need to create an account at this time. When creating, a "None" option will appear next to these options in the bank card. It is easy to register. Remember to choose free software first. If you don't select, there is no "None" option. When setting a password, you should also pay attention to the fact that there must be uppercase letters, lowercase letters and numbers, all of which are indispensable. Finally, I went to the mailbox to connect. I just finished verifying. I verified the webpage slowly and patiently. I wish you success!