The DBX Phone Lock Tool was third-party software developed by reverse engineers (often referred to as "box crackers" or "unlockers") who exploited the BB5 and later platform security of Ericsson/Qualcomm chipsets. Unlike official unlock methods (which required unique codes from carriers or Sony Ericsson service centers), DBX aimed to brute force or bypass the lock mechanism entirely.

"DBX" likely refers to the Debug Box protocol used in Qualcomm chipsets, which allowed low-level communication with the phone's internal firmware via USB. The tool promised to:

If your Vivaz is asking for a Google account (Gmail) and password after too many pattern attempts, but the device has no internet connection (WiFi/3G is off), this is a common issue with older Android/SE phones.

If you absolutely require the specific "DBX" tool for advanced repairs (e.g., for repairing the EROM or SEMC boot), be aware that legitimate copies are difficult to find today. Most modern antivirus software will flag these service tools as "HackTool" or "Trojan."

Recommendation: Try the Hard Reset (Step 2) first. It is the standard fix for a "hot" pattern lock on a Vivaz and requires no downloads.