You need a PC.
HiSuite is a software owned by Huawei, it is installed on the PC, with it you can manage the data of your Huawei phone, you can organize contacts, messages, calendars, apps, music, images and software updates.
Guide for install HiSuite in your PC:
● The latest Huawei HiSuite version is installed on your computer. You can download it from https://consumer.huawei.com/en/support/hisuite/
● Your phone has a remaining battery power of higher than 30% throughout the update.
● Do not disconnect the USB cable, power off or restart your phone, or remove or insert the microSD card throughout the whole process.
1.- Connect your phone to HiSuite and click Update on your computer.
2.- After a new version is found, update your phone. When the update is complete, your phone will automatically restart.
* Figures are for reference purposes only and may differ from your device.