What does the letter zg of Apple mobile phone mean?

You said that it is a brand-new mobile phone product created by ZG Company (full name: ZG High Ticket Products Co., Ltd.), also known as customized version of Apple ZG, which is another choice provided by ZG Company for consumers who are pursuing maverick. This phone is an iphone customized by ZG mobile phone agent. The estimated price of genuine ZG Apple customized mobile phone is around 40,000, and it is a global limited edition, which is difficult for ordinary people to buy.