No. SIM lock (network lock) is stored in a separate NV partition. Flashing firmware cannot change carrier subsidy locks. You still need a network unlock code.
This happens if you previously unlocked the bootloader. After flashing global firmware, run:
fastboot oem lock
(Be careful: This wipes data again.)
No. The latest official global firmware for Y66 is Android 7.1.1 Nougat (Funtouch 3.2). Vivo did not release Android 8+ for this chipset. Any "Android 10" ROMs online for Y66 are fake or malware.
Official sources are rare; however, trusted community sites include:
Look for filenames containing:
PD1612F_EX_A or PD1612F_Global
Avoid “Demo” or “China” builds.
Q1: Can I install vivo Y66 global firmware on a Chinese version?
Q2: Will I lose my data after flashing?
Q3: My phone is asking for a password after flashing, but I wiped it. Why?
Q4: Is there an Android 9 or 10 global firmware for Y66?
If your phone is stuck on the Vivo logo, global firmware restores the boot partition to factory condition.
After successfully flashing your vivo Y66 global firmware, you will be greeted with the Android setup wizard (likely Android 6.0 Marshmallow or 7.1 Nougat, depending on the firmware version).
No. SIM lock (network lock) is stored in a separate NV partition. Flashing firmware cannot change carrier subsidy locks. You still need a network unlock code.
This happens if you previously unlocked the bootloader. After flashing global firmware, run:
fastboot oem lock
(Be careful: This wipes data again.)
No. The latest official global firmware for Y66 is Android 7.1.1 Nougat (Funtouch 3.2). Vivo did not release Android 8+ for this chipset. Any "Android 10" ROMs online for Y66 are fake or malware.
Official sources are rare; however, trusted community sites include: vivo y66 global firmware
Look for filenames containing:
PD1612F_EX_A or PD1612F_Global
Avoid “Demo” or “China” builds.
Q1: Can I install vivo Y66 global firmware on a Chinese version? Q1: Can I install vivo Y66 global firmware
Q2: Will I lose my data after flashing?
Q3: My phone is asking for a password after flashing, but I wiped it. Why?
Q4: Is there an Android 9 or 10 global firmware for Y66? depending on the firmware version).
If your phone is stuck on the Vivo logo, global firmware restores the boot partition to factory condition.
After successfully flashing your vivo Y66 global firmware, you will be greeted with the Android setup wizard (likely Android 6.0 Marshmallow or 7.1 Nougat, depending on the firmware version).
