Installing a custom ROM on the Vivo 1801 (Vivo Y71) is notoriously difficult due to Vivo's strict security policies that typically prevent bootloader unlocking . While the hardware is based on the Qualcomm Snapdragon 425
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Once the bootloader is breached, the next requirement is a custom recovery. For the vivo 1801, TWRP (Team Win Recovery Project) is the gold standard. Installing a custom ROM on the Vivo 1801
