Vivo has started rolling out a new software update to its Vivo S1 Pro smartphone users. The latest update brings the FuntouchOS update. This update comes with the build number PD1945F_EX_A_6.8.21 and the size package of this update is 3891.2MB. You can download the update from the link mention below.
Tutorial for Firmware Installation
Warmly Tips:
Limited by Android 8 and higher version, the phones with Android 8 and higher versions cannot flash the lower version(You can check the current version of your phone in Settings>System update).
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Your data on your phone won`t be cleared. However, we also recommend you back up your important data such as contacts, messages before doing it. Moreover, make sure the battery capacity is sufficient(over 30%).
1. Download the corresponding firmware for your phone;
2. Move it to the root directory of your phone storage or SD card without decompressing;
Note: The root directory is basically the first thing you see when you open a file explorer on your phone. In other words, do not put the file in a folder. The files which you can find in the Phone storage interface of File Manager locate the root directory.
3. Install the firmware:
If you can enter your phone, click the firmware in File Manager to install it.