Typically ranges from 4.4 (KitKat) to 6.0 (Marshmallow) depending on the production batch.
Before downloading any files, verify that your device matches these general specifications to avoid "bricking" the hardware: firmware mtech 8803 best
Spreadtrum (SPD) or MediaTek (MTK) – Check your specific build. File Type: Scatter file (for MTK) or PAC file (for SPD). Typically ranges from 4