groups will be rejoined if u don't deactivate it...And if you want to do a factory reset then pls back up ur WhatsApp and contacts to G drive and also ur imp data like photos and videos...there is no harm to the phone tho by a factory reset..it just cleans up the device...
Yes your wtsp data will be erased since wtsp doesn't have their own server to store messages. So back up those messages to your Gdrive before formatting
You can back up your chats and media to Google Drive, so if you change Android phones or get a new one, your chats and media are transferrable.
How to create a Google Drive backup:
Open WhatsApp.
Tap Menu > Settings > Chats > Chat backup.
Tap Back up to Google Drive and select a backup frequency other than Never.
Select a Google account that you'll back up your chat history to. If you don't have a Google account connected, tap Add account when prompted and enter your login credentials. Please remember the Google account you're using for the backup.
Tap Back up over to choose the network you wish to use for backup. Please note that backing up over a cellular data network might result in additional data charges.
You can also manually back up your chats to Google Drive at any time:
Open WhatsApp.
Tap Menu > Settings > Chats > Chat backup.
Tap BACK UP to begin your Google Drive backup. This process might take a few minutes.
Note: Depending on the size of the chat, the first complete backup could take a while. We recommend that you connect your phone to a power source. However, subsequent backups are incremental, thus not requiring a completely new backup of all your data every time. Important: Media and messages you back up aren't protected by WhatsApp end-to-end encryption while in Google Drive.
In order to successfully restore a Google Drive backup, you need to use the same phone number and Google account used to create the backup. To restore your backup:
Make sure the same Google account that was used to perform the backup has been added to your phone.
Uninstall and reinstall WhatsApp.
After verifying your phone number, you'll be prompted to restore your chats and media from Google Drive. Tap RESTORE.
After the restoration process is complete, tap NEXT and your chats will be displayed once initialization is complete.
After restoring your chats, WhatsApp will begin restoring your media files.
Note: If you're installing WhatsApp without any prior backups from Google Drive, WhatsApp will automatically restore from your local backup file. Learn more from this article on restoring chat history.
