Message sharing

[reiddy23]

How do you can you tell if you messages are being shared with someone's else....

How do you disabled the feature?

[realaud]

Do you mean if someone is spying on you? Or do you mean if someone you message is sharing your message with someone else?

[reiddy23]

Spying is the correct word indeed. So I would send messages but a third party is also privy to messages. Phone instrument is note 20

[realaud]

So, you think someone may be electronically eavesdropping? I'm pretty sure there is no way to tell unless someone is giving you clear signals that they know what you are saying to others. There may be some apps out there that can detect that kind of spyware, but someone would have had to have access to your phone to install it, or you would have had to click a link in a message or email from the person you suspect of this. Odds are very low that it would be some random stranger.

May I ask why you think your messages are being read by someone?

[reiddy23]

It's an ex. Base on what she said I am certain she is seeing my messages. Is is possible from web base to get see them then? Am just throwing around possibilities here...
She even saw a screen shot that was sent to me...so I know for a fact she has access...

[realaud]

Perhaps at least one of your friends is not really your friend, and is forwarding things on.

I do not believe there is any way to tell without giving Megabucks to a cybersecurity expert. What you can do is
A) make sure you change the password to your Google and Samsung accounts, and your email, for good measure.
B) Check your Google account to see if any devices that are not yours are logged in. If you see any you do not recognize, log them out. If you accidentally log yourself out, the worst that will happen is that you will have to log back in.
C) Factory reset your phone and only restore your settings and contacts and download all your apps clean (pretty sure it's time for a cleanout anyway).
D) Ask your carrier for a new SIM if you are using a physical SIM.

It's a pain in the neck, but you should feel safer. Never let a potential ex (i.e. current SO) have access to your phone or accounts or any password for same.

You can also switch to WhatsApp as your messaging app and tell your friends that's the only way to message you.

As @Robin621k suggested, if you are using Google messages and said ex paired their computer to their phone after having had acess to your Google account, they would be able to read your messages from their computer. The most important thing is to change your Google password and 2FA authentication method.

[realaud]

Download MalwareBytes from the Play store, and please stop hijacking posts with off topic requests.

[userRNJWieVora]

You can install under settings >more connections>private dns>dns.adguard.com.

[itsjustmenotyou]

What does this do

[userRNJWieVora]

It blocks ads and pop ups.