Can I call the police if I receive an unknown text message?

Legal analysis: nothing, just a little fuss. Now it has been proved that it is not your colleague, and that stranger has not caused you any economic or personal harm.

Legal basis: Provisions on Procedures of Public Security Organs Handling Criminal Cases

Article 171 The public security organ shall promptly examine the cases accepted or the criminal clues discovered. If the facts or clues of the case are unknown during the review, a preliminary investigation may be conducted with the approval of the person in charge of the case-handling department when necessary. During the initial investigation, the public security organ may, in accordance with the relevant laws and regulations, take measures that do not restrict the personal and property rights of the investigated object, such as inquiry, inquiry, inspection, appraisal and obtaining evidence materials.

Article 175 After accepting a case, the public security organ shall, after examination, consider that the criminal facts that need to be investigated for criminal responsibility belong to its own jurisdiction, and file a case with the approval of the person in charge of the public security organ at or above the county level; If it is considered that there are no criminal facts, or the criminal facts are obviously minor and need not be investigated for criminal responsibility, or there are other circumstances in which criminal responsibility is not investigated according to law, the case shall not be filed with the approval of the person in charge of the public security organ at or above the county level.