How do I unblock a number? The steps to unblocking a number are similar to the steps involved in blocking the number in the first place. On the Recent tab of your Phone app, tap and hold on the blocked number for a few seconds, until the options appear. Tap Unblock. How do I know if a number is spam? A great feature with Android smartphones is that they can pre-screen incoming calls and if it is suspected to be a spam call then this will be listed on the caller ID. To turn on this feature, enter the Settings on your Phone app, tap Caller ID and spam, then toggle this on.
