What message can a mobile phone send to open a blue brick?

Hello, landlord, I'm glad to answer your question: You can send 52 to 10665999 on your mobile phone, and just follow the prompts to open the green diamond. If you have any questions, please consult QQ200729567, and I can answer them at any time. If you think my answer satisfies you or solves your problem in time, please adopt it and give it a 5-star evaluation. Thanks for your support.