No. Full firmware for CPH2357 is between 2.8GB and 3.5GB. A 1.8GB file is either corrupted or missing critical partitions like super.img .
Flashing is a low-level operation. Mistakes can be costly. cph2357 flash file
Disclaimer: This report is for educational purposes. Flashing firmware without official authorization may violate local laws and manufacturer terms. cph2357 flash file
No. Flashing stock firmware locks the bootloader if it was unlocked. To root or install custom ROMs, you need a separate bootloader unlock tool (not covered here). cph2357 flash file