Stock ROM Vivo Y21D (V2520) PD2510F All File Repair Official Firmware & OTA Update SPD rom NV-Security Backup File dump Unbrick Fix dead boot loop logo.
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OFFICIAL FIRMWARE
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PD2510F-EX-A-15.0.15.1.W20.V000L1-vivo-osc-unisoc-sprdroid15-sys-main-W24.37.2-P1 (9,1G)
PD2510F-EX-A-15.0.11.1.W20.V000L1-vivo-osc-unisoc-sprdroid15-sys-main-W24.37.2-P1 (8,3G)