how do i delete contacts on my A205G
It is important for you to first backup all your contacts or any other information for that matter if you still wish to erase the private data on your A205G Android smartphone . You can do this by storing your information on the cloud or directly backing up the data from your android gadget to your personal computer with 3rd-party program like MobiKin Assistant for Android. It is still possible for you to make a backup of your contacts directly on your SD card simply by opening the default stock "Contacts" app and using the "Import & Export" option.
To permanently erase personal contacts on Android, you need to get a powerful eraser like this Android Data Eraser. With this software, you can truly delete any files as you wanted from your Android device with zero possibility of being recovered, including contacts. Also, this software can enable to clean up useless junk files from Android, so as to free up more precious storage space and speed your device!
Hope that helps!