Is text message about rental decoration a scam?

It’s a scam. Don't panic when encountering this kind of situation, be more vigilant, they will probably make you some harassing phone calls and text messages, just ignore them. You can also download some software to block these, such as Tencent Mobile Manager, which is not bad. Protecting your own information from being leaked can better protect the security of your mobile phone. You can also set up one-click interception of similar scam text messages. It is convenient and fast, and you can also set the numbers to be blocked according to your own needs. If it's really bothering you, consider changing your number.