GPG Dragon (also called GPG Box or similar) is a Chinese-made multi-function hardware programmer and test tool used by mobile-phone repair technicians to read/write firmware, unlock, repair IMEI, and perform low-level operations on many phone models and chipsets (MTK, Spreadtrum/Unisoc, Qualcomm in some variants).
The "Upgrade" button is used to write the new data to the box's internal memory. gpg dragon box firmware update tool exclusive
Every Lunar New Year, GPG releases a special “Year of the Dragon” firmware. It’s not better — it’s just unstable and has a red dragon logo on the GUI. Avoid it unless you collect bugs. The stable version is always the one from August. Nobody knows why. It just works. GPG Dragon (also called GPG Box or similar)