Samsung Galaxy A40
If you want to delete the Google account from a Galaxy A40 either to sell your terminal, give it to a relative or friend, recycle it or if you have decided to switch to another Google account, you can do so by following the steps indicated continuation.
When delete the Google account from Galaxy A40 we deactivate the FRP (Factory Reset Protection) of the operating system Android 9.0 (Pie), this is a protection that links the Samsung Galaxy A40 to a Google account so that when it is rebooted or blocked due to loss or theft, ask for the Google account username and password.
1- First step:
To delete the Google account go to the settings of your Samsung, it is the icon of the gear wheel, the settings icon should be on the home screen or in the phone menu, you can access the main menu by dragging your finger from the bottom to the top of the screen.
2- Second step:
Look for the section called "Google" or "Accounts".
3- Third step:
The accounts linked to this Samsung Galaxy A40 will appear, delete the desired account.
After you delete the account, you may want to reset the Galaxy A40 to its factory state and thus eliminate all data from the Samsung, to do this from "Settings" click on "System", then "Reset settings", then "Factory data reset" and finally "Delete all".
This is the method for unlink Google account from Samsung Galaxy A40 and erase all your data from the system settings.
Another more drastic method to erase the Google account in a Samsung Galaxy A40 would be doing a hard reset or factory reset. It is a drastic method because in addition to deleting the Google account it resets the Samsung to its factory state and has to re-optimize all applications which takes more time than a simple deletion of Google account.
About the device:
Samsung Galaxy A40 is a device with a dimensions of 144.3 x 69.1 x 7.9 mm (5.68 x 2.72 x 0.31 in), a screen size of 5.9 inches, 85.5 cm2 (~85.7% screen-to-body ratio) and a screen resolution of 1080 x 2340 pixels, 19.5:9 ratio (~437 ppi density).
It has a processor Octa-core (2x2.2 GHz Cortex-A73 & 6x1.6 GHz Cortex-A53), a graphics card Mali-G71, a RAM memory 4 GB and an internal memory of 64 GB, 4 GB RAM.
The Samsung Galaxy A40 it comes from the factory with the operating system Android 9.0 (Pie)