Because these tools are modified by third parties to remove license checks:
While it looks like a "magic key" for phone repair, it is more often a relic of a risky era of DIY phone unlocking that poses more danger to your computer than help for your phone. qualcomm-premium-tool-v2-5-free-2019
The search for "Qualcomm Premium Tool V2.5 Free 2019" often leads down a path of "gray-market" software—tools designed to bypass factory security on mobile devices. While they promise quick fixes for locked phones, the story behind them is usually one of high risk and questionable reliability. The Tool's Purpose Because these tools are modified by third parties
By 2026, the 2019 version of this tool is largely obsolete for modern devices. Security patches (like those in Android 11 through 14) have closed the loopholes this software relied on. Most reputable technicians have moved on to official service tools or more secure, updated paid platforms that offer support and safety. The Tool's Purpose By 2026, the 2019 version
: They are notorious for being bundled with malware, trojans, or keyloggers. Since the software requires "Administrative Privileges" and for you to disable your antivirus to run, it creates an open door for infecting your PC.
: Allowing the installation of custom software.