How to remove an account from your Samsung phone:

Access Settings: Open the "Settings" app on your device.
Navigate to Accounts and Backup: Scroll down and select "Accounts and Backup."
Access Accounts: Tap on "Manage accounts."
Select Personal Info: Choose "Personal Info" and then tap on "More Options" (usually represented by three vertical dots).
Remove Account: Look for the "Remove Account" option and select it.
Review Information: A screen will appear with account information. Review the details to ensure you're removing the correct account.
Confirm Removal: Tap "Remove" to confirm the removal of the account.
Enter Password: For security verification, you may need to enter your account password. Do so, and then tap "OK."
Factory Data Reset (Optional): If you want to reset your device to its factory defaults, go back to the main "Settings" menu and select "Factory Data Reset" or similar wording (the location may vary depending on your device).
Access Accounts: Tap on "Manage accounts."
Following these steps, you'll manually remove an account from your device.

How to remove an account remotely from your desktop or laptop:

Sign In: Visit https://account.samsung.com/membership/intro and sign in with your Samsung Account on your computer.
Password and Security: Choose "Password and Security" from the menu.
Confirm Password: For security, confirm your password by entering it.
Manage Devices: Under "Devices," you'll see a list of devices linked to your account.
Log Out: Find the device you want to remove and click "LOG OUT" next to it.
Confirm Removal: Click "CONFIRM" to finalize the removal.
That's it! You've successfully removed an account remotely from your computer.

How to remove an iCloud account from an iPhone:

Back Up Your Data: Before proceeding, make sure you have a recent backup of your iPhone. You can do this by going to "Settings" > [your name] > iCloud > iCloud Backup > "Back Up Now."
Sign Out of iCloud: Open the "Settings" app on your iPhone. At the top, you'll see your name or Apple ID; tap on it. Scroll down and tap "Sign Out." Enter your Apple ID password when prompted. Choose to erase your data entirely from the device.
Erase All Content and Settings: After signing out of iCloud, go back to the main "Settings" screen. Scroll down and tap "General." Scroll to the bottom and select "Reset." Tap "Erase All Content and Settings." Confirm your choice, and the iPhone will reset to factory settings.

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Open Your Web Browser: Begin by opening your preferred web browser on your desktop or laptop.
Visit the iCloud Website: Go to https://www.icloud.com and log in with your Apple ID and password. Ensure you use the same Apple ID that's associated with the device you want to remove.
Authenticate: If two-factor authentication is enabled for your Apple ID, you'll need to enter the verification code sent to your trusted device or email.
Access Device List: After successfully logging in, click on your name in the top-right corner of the iCloud website to access your account settings.
Select "All Devices": In the Account Settings section, locate and click on "All Devices." Here, you'll see a list of all the devices connected to your iCloud account.
Confirm Removal: Click "CONFIRM" to finalize the removal.
Remove the Device: Find the device you want to remove and click on it to select it. Then, click the "Remove from Account" button. You may need to confirm this action.

Here's a short explanation of how to remove an iCloud account from an iPad:

Back Up Your Data: Before proceeding, make sure you have a recent backup of your iPad. You can do this by going to "Settings" > [your name] > iCloud > iCloud Backup > "Back Up Now."
Sign Out of iCloud: Open the "Settings" app on your iPad. At the top left, you'll see your name or Apple ID; tap on it. Scroll down and tap "Sign Out." Enter your Apple ID password when prompted. Choose to erase your data entirely from the device.
Erase All Content and Settings: After signing out of iCloud, go back to the main "Settings" screen. Scroll down and tap "General." Scroll to the bottom and select "Reset." Tap "Erase All Content and Settings." Confirm your choice, and the iPad will reset to factory settings.

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Open Your Web Browser: Begin by opening your preferred web browser on your desktop or laptop.
Visit the iCloud Website: Go to https://www.icloud.com and log in with your Apple ID and password. Ensure you use the same Apple ID that's associated with the device you want to remove.
Authenticate: If two-factor authentication is enabled for your Apple ID, you'll need to enter the verification code sent to your trusted device or email.
Access Device List: After successfully logging in, click on your name in the top-right corner of the iCloud website to access your account settings.
Select "All Devices": In the Account Settings section, locate and click on "All Devices." Here, you'll see a list of all the devices connected to your iCloud account.
Remove the Device: Find the device you want to remove and click on it to select it. Then, click the "Remove from Account" button. You may need to confirm this action.
Confirmation: A confirmation message will appear, confirming that the device has been removed from your iCloud account. The device will no longer have access to your iCloud data.

Apple Watches are linked to the iCloud account of your paired iPhone, and the Apple Watch relies on the iPhone for the process of removing it from your iCloud account.

To proceed with the removal, initiate the unpairing of your Apple Watch from your connected iPhone.

Ensure iPhone Connection: Make sure your iPhone is paired and connected to your Apple Watch.
Open the Watch App: On your paired iPhone, open the "Watch" app.
Tap on Your Watch: In the Watch app, tap on your watch's name at the top of the screen. This will take you to the watch's settings.
Unpair Your Watch: Scroll down to find the "Unpair Apple Watch" option. Tap on it.
Confirm Unpairing: A confirmation message will appear, explaining that unpairing your watch will erase it and remove it from your iCloud account. Confirm the action by tapping "Unpair."
Enter Apple ID Password: You may be prompted to enter your Apple ID password or your device passcode to confirm the unpairing process.
Wait for Unpairing: The unpairing process will start. It may take a few minutes. Once it's complete, your Apple Watch is no longer linked to your iCloud account.

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Open Your Web Browser: Begin by opening your preferred web browser on your desktop or laptop.
Visit the iCloud Website: Go to https://www.icloud.com and log in with your Apple ID and password. Ensure you use the same Apple ID that's associated with the device you want to remove.
Authenticate: If two-factor authentication is enabled for your Apple ID, you'll need to enter the verification code sent to your trusted device or email.
Select "All Devices": In the Account Settings section, locate and click on "All Devices." Here, you'll see a list of all the devices connected to your iCloud account.

Here's a short explanation of how to remove an iCloud account from an macbook:

Back Up Your Data: Before proceeding, make sure you have a recent backup of your macbook. You can do this by going to "Settings" > [your name] > iCloud > iCloud Backup > "Back Up Now."
Sign Out of iCloud: Open the "Settings" app on your macbook. At the top left, you'll see your name or Apple ID; tap on it. Scroll down and tap "Sign Out." Enter your Apple ID password when prompted. Choose to erase your data entirely from the device.
Erase All Content and Settings: After signing out of iCloud, go back to the main "Settings" screen. Scroll down and tap "General." Scroll to the bottom and select "Reset." Tap "Erase All Content and Settings." Confirm your choice, and the macbook will reset to factory settings.

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Open Your Web Browser: Begin by opening your preferred web browser on your desktop or laptop.
Visit the iCloud Website: Go to https://www.icloud.com and log in with your Apple ID and password. Ensure you use the same Apple ID that's associated with the device you want to remove.
Authenticate: If two-factor authentication is enabled for your Apple ID, you'll need to enter the verification code sent to your trusted device or email.
Access Device List: After successfully logging in, click on your name in the top-right corner of the iCloud website to access your account settings.
Select "All Devices": In the Account Settings section, locate and click on "All Devices." Here, you'll see a list of all the devices connected to your iCloud account.
Remove the Device: Find the device you want to remove and click on it to select it. Then, click the "Remove from Account" button. You may need to confirm this action.
Confirmation: A confirmation message will appear, confirming that the device has been removed from your iCloud account. The device will no longer have access to your iCloud data.

How to Remove Activation Lock

How to remove an account from your Samsung phone:

How to remove an account remotely from your desktop or laptop:

How to remove an iCloud account from an iPhone:

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Here's a short explanation of how to remove an iCloud account from an iPad:

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

To proceed with the removal, initiate the unpairing of your Apple Watch from your connected iPhone.

How To Remove an iCloud Account Remotely from your Desktop or Laptop:

Here's a short explanation of how to remove an iCloud account from an macbook:

How To Remove an iCloud Account Remotely from your Desktop or Laptop: