You can easily check the network speed your device is using with its built-in feature.
Displaying network speed on OPPO F3 Lite (A57) is as follows:
Step 1: Go to 'Settings' and select 'Notification & Status Bar.'

Select 'Notification & Status Bar.'
Step 2: Turn on network speed display.

Turn on network speed display.
Setup process completed. Wishing you success.
