If you are looking to service a device, consider these more secure paths:
Installing or updating the device operating system.
Gaining deeper access to the device’s software. The Dangers of "Patched" or "Free" Versions
Most "patched" tools are bundled with Trojans or keyloggers. Since these tools require you to disable your antivirus to run, your computer becomes an open target for data theft.
Many GSM tools offer affordable 3-month or 6-month digital licenses that provide cloud support and guaranteed safety.
Unofficial versions of GSM tools often have unstable code. Using them to flash a phone can result in a "hard brick," rendering the mobile device permanently unusable.