Due to Android security restrictions, these popular “hack” codes no longer work:
Secret codes, technically known as MMI (Man-Machine Interface) or USSD (Unstructured Supplementary Service Data) codes, are numeric strings you enter into the phone’s native dialer app. When entered correctly, they trigger pre-programmed actions in the phone’s firmware. On the Xperia 5 III, these codes can test hardware components, reset network settings, display device statistics, or access engineering modes. How to Use Secret Codes on SONY Xperia 5 III
These codes are diagnostic tools, not hacking exploits. Using them does not void your warranty. However: Due to Android security restrictions