While this will help mask your caller ID, there is a downside to doing so and that is there are some people who refuse to answer calls from anonymous callers or numbers they don’t know, so that’s something to take into consideration if you are planning on using this feature. However with this new feature, users will be able to continuously mask their caller ID when making calls using Google Voice, plus it will be a nifty feature for users who weren’t aware of the *67 feature before that either. The receiver will not be able to see your phone number, and will see 'No.
Now the ability to mask your caller ID using Google Voice (or other carriers) isn’t exactly a new feature as all users need to do is append *67 in front of a number. Dial 67 before the number you want to call. This suggests that users will be able to turn this feature on and hide their caller IDs when making outgoing phone calls.
Caller ID spoofing is completely legal and with it you can make your phone call any other.
In the latest version of Google Voice for Android, it has been discovered that within the code of the app, there contain strings which references the ability for users to enable “Anonymous Caller ID” and “Hide your caller ID on outgoing calls”. Our Free Spoof Call lets you Change your caller ID for free. This feature allows you to set a number on incognito mode which means not only will that contact never appear on your call log, but their name and picture will never be shown on calls and no call reminders or SMS notifications will be displayed for your incognito number.