To unblock contacts in imo, follow these steps:
1. Open the imo app on your device.
2. Tap on your profile avatar in the top-left corner of the screen to open the menu.
3. From the menu, select "Security & Privacy."
4. Scroll down and tap on "Blocked List."
5. You will see a list of contacts that you have blocked on imo.
6. Find the contact you want to unblock and tap on the "Unblock" icon.
7. A confirmation message will appear asking if you want to unblock the contact. Tap on "Unblock" to proceed.
8. The contact will now be unblocked, and you will be able to send and receive messages from them again.
Note:
When you unblock a contact, any previous chat history with that contact will not be restored.