Use transparent signs. If the mobile phone can access the Internet, go to wap.google.cn to search for "transparent logo" and download it to the mobile phone. Those words will disappear. I've used it before, but I warn you that you can't take off the battery of your mobile phone in the future, or it will become a mobile phone if you install China Mobile again? Number. You have to reset it through an MCC mobile phone software, as long as there is no battery, use the previous method.