Vivo Y21 Firmware Series

Vivo Y21 Super size your storage
Firmware Code : Y21 Upgrade Package PD1309CW_EX_A_1.12.7 ONLY FOR India, Indonesia, Myanmar, Thailand, Malaysia
Firmware update is credit to http://www.vivo.com.

Download : PD1309CW_EX_A_1.12.7 2017-05-11

Vivo Y21L
Firmware Code :
Y21L Upgrade Package PD1309F_EX_A_1.14.0 ONLY FOR India

Download : PD1309F_EX_A_1.14.0 2017-05-11

How to Install update via recovery:
In shutdown device, press hold power and volume up button simultaneously until VIVO log recovery appears. After you enter the Recovery mode, select "Install update" by pressing Volume down button or touching it directly;then choose the Vivo ZIP update you downloaded, wait until finish and reboot system.

Note! Do it at your own risk, After flashing update ! the device is set automatic in reset condition, All user data is lost. Make sure back-up first before to proceed flashing your phone.