Does a divorce take effect if a man says to his wife: "If you touch my phone again, you are divorced," intending a threat and not a divorce, and then the wife touches the phone without opening it or searching through it?

What you uttered is considered a conditional divorce, and breaking this condition necessitates divorce according to the majority of jurists, whether the husband intended divorce or merely a threat. This is what we issue fatwas on. If your wife touched the phone in the sense you intended, such as opening it to search through conversations, then divorce occurs. However, merely touching it does not cause divorce to occur. It is advisable to avoid using divorce pronouncements when solving problems.