You can block unknown contacts on Threema from the privacy setting of the app on your Android phone. You won’t get any messages from your friends if their details are not stored in the app address book or if they haven’t linked their account to an email or phone number.

Threema is one of the popular secure messaging apps available as a paid download for Android and iOS devices. It is open source and doesn’t collect user data while ensuring that messages are send and received using end to end encryption technology. It was first released in 2012 and since then it has attracted more than 8 million.

What to do when you get unwanted messages from unknown contacts in Threema

There might be instances when you will be getting unwanted messages from unknown users on your app. To prevent this from happening you can easily block people not on your contact list from contacting you on the app. Here’s how to do it.

Block an unknown contact on Threema

If you are constantly getting messages from people that you don’t know then here’s how to to block them.

Time needed: 2 minutes.

Blocking unknown people on Threema

Open Threema.
You can easily do this by swiping up from the home screen and tapping the app icon.
Tap More.
This is the three vertical dots found at the top right part of the screen.
Tap Settings.
This will allow you to manage the various app settings.
Tap Privacy.
This will open the Threema app privacy settings.
Tap Block unknown to place a check mark on its box.
This will allow only people on your contact list to send you messages.