Professional tools like Hydra or UMT can often reset a screen lock while keeping your media files (photos/videos) intact.
MediaTek MT6877 , commonly known as the Dimensity 900 , is a high-performance 6nm chipset designed for mid-range 5G smartphones. Flashing this specific processor requires specialized tools due to its modern "Secure Boot" architecture, which often blocks standard third-party firmware installations unless specific authentication bypasses are used. Core Tools for MT6877 Flashing mt6877 flash tool
Choose "Download Only" (Safe) or "Firmware Upgrade" (if the phone is boot-looping). Avoid "Format All + Download" as it can erase your IMEI/Serial Number. Connect Device: Turn off your phone completely. Click "Download" in the tool. Hold Volume Up + Volume Down and plug in the USB cable. Professional tools like Hydra or UMT can often
Flashing firmware carries risks. Always backup your NVRAM/IMEI partitions before a full flash to avoid losing cellular connectivity. Core Tools for MT6877 Flashing Choose "Download Only"
Because TWRP for MT6877 is rare (check XDA forums), you can use the flash tool to test-build one: