Forgetting your Samsung A70 password can be a frustrating experience, but fear not, there are several methods you can try to unlock your device without the password. Here are a few steps you can take:

1. Utilize Samsung's 'Find My Mobile' Service:
   If you have previously set up Samsung's 'Find My Mobile' service on your device, you can use it to unlock your phone remotely. Simply go to the Find My Mobile website, log in with your Samsung account, select your device, and choose the option to unlock your phone.
2. Use Android Device Manager:
   Another option is to use Google's Android Device Manager. Go to the website, log in with your Google account, select your device, and choose the lock option to set a new password, which will replace the old one.
3. Perform a Hard Reset:
   If the above methods don't work or you haven't set them up beforehand, you can perform a hard reset on your Samsung A70. Keep in mind that a hard reset will erase all data on your phone, so it should be used as a last resort.

Remember, it's always a good idea to regularly back up your data to prevent data loss in situations like these. Additionally, consider using secure methods like biometric authentication or a password manager to avoid forgetting your passwords in the future.