Your Quick Answer:
To freeze your last seen from someone is to delete his number and set your last seen settings to “My contacts”.

If you hide your last seen from others, you too won’t be able to see the last seen of others. However, some tools work in this case.
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How To Freeze Last Seen On WhatsApp Without GB WhatsApp:
If you want to hide the last seen without the Mod ‘GBWhatsApp’, there are these methods described below:
1. Setting Last Seen to Nobody
The best method to freeze your WhatsApp’s last seen from everyone is to set your last seen in a certain way. What you need to set is “Nobody”, on your last seen section. By selecting this option, no one will be able to see your last seen time on WhatsApp.
🔴 Follow The Steps:
Step 1: Open WhatsApp on your device.
Step 2: On the inbox interface, take your finger to the top right corner of the screen and tap on “Three dots”.

Step 3: A menu list will come down, choose the last option of “Settings”.

Step 4: After that, tap & open the first option which says: “Account”.

Step 5: Over there, select “Privacy” and then, “Last Seen > Nobody”.

And it’s done, now nobody can check your last seen time.
However, this feature brings a drawback along with it. The drawback is, after setting your last seen to “Nobody”, you also cannot see the last seen of others.
If you don’t want this, read the next section.
2. Delete Person from Contacts
Turning the privacy settings of the last seen to “Nobody”, is definitely effective and accurate, but is not good for the one who wishes to check another’s last seen. If you want to hide the last seen from some particular individual then, this method of freezing the last seen would work for you.
Simply delete the person’s phone number from your contact list with whom you want to hide your last seen.
After deleting the phone number, come back to your WhatsApp and turn your last seen settings to “My contacts”, which means only the people in your contact list will be able to check your last seen.
🔴 Steps To Follow:
After deleting the number from the phone’s contact book,
Step 1: Open your WhatsApp.
Step 2: On the Chats interface, find the “Three horizontal dots”, on the top right corner, next to the search icon.

Step 3: On the list, choose “Settings”, > “Account” and then “Privacy”.

Step 4: Next, on the last seen menu, select > “My contacts”.

Come back and now you are done.
3. Turn Off Wi-Fi
You should know that WhatsApp updates your last seen status by connecting to the internet. If you turn off Wi-Fi and mobile data, the app won’t be able to update your last seen status.
However, you won’t be able to receive or send messages until you turn on your internet connection again.
4. Turn on Airplane Mode
Another way similar to turning off Wi-Fi and mobile data, turning on Airplane mode will disconnect your device from the internet and prevent WhatsApp from updating your last seen status. Again, you won’t be able to receive or send messages until you turn off Airplane mode.
5. WhatsApp in Offline Mode
Also, you can try using WhatsApp in offline mode to freeze your last-seen status. However, you won’t be able to receive or send messages until you turn on your internet connection again.
6. Delete WhatsApp
The best way is if you don’t want to be tracked by WhatsApp, you can simply delete the app from your device. However, you won’t be able to use WhatsApp until you reinstall it.
7. An older version of WhatsApp
You should know that some older versions of WhatsApp do not update your last-seen status in real-time. You can try using an older version to freeze your last seen status.
However, this method may not be effective as WhatsApp may force you to update to the latest version.