How Do U Unblock A Phone Number

I don't believe Net10 provides a "Blocking" feature for a customer to block unwanted callers. Therefore, you should not need to "Unblock" a number as you could not have blocked it. (As per discussion in the Net10 support forum located here)

If you are having an issue with receiving calls from a certain number, confirm that person has not placed a block on their sercvice to block your number.

If he/she confirms no block has been placed, please contact Net10 Customer Care. 

Here's how:

If you're an existing customer, please have your NET10 Phone Serial Number and your NET10 Phone Number available when contacting them for the best possible service.

NET10 Phone Customers: 1-877-TEN-CENT (1-877-836-2368)

To speak with a Representative:

Press 1 for English
Press 4 at first menu
Press 4 at second menu

Hope this helps