Go to Settings > Phone > Blocked Contacts . Tap Edit , then the minus (-) icon next to the number, and select Unblock .
If you have a landline with Caller ID blocking enabled: how to unblock your number
This is the most common way to bypass a block. By hiding your Caller ID, the recipient's phone will not recognize the incoming number as "You," and therefore will not trigger the block. Go to Settings > Phone > Blocked Contacts
Before we dive into the unblocking process, it's essential to understand why your number might be blocked in the first place. Here are a few common reasons: how to unblock your number