Phone Favorites list, but never get calls from anyone else not in FavoritesOR Choose All Contacts, which will allow phone calls to come through from anyone in your Contact list not just Favorites but not anyone who isnt already added to your address book this is the better solution for many, since obviously an Unknown caller, solicitor, or No Caller ID call wont be in the address book of your i. Phone, but if everyone you do communicate with IS in your i. Phone contact list, you wont miss their calls. Exit out of Settings and enjoy your new peace and quiet. Remember choosing All Contacts will prevent any phone number or address that is not in your i. Phone Contacts list from reaching the i. Phone. Do not enable this without thorough comprehension, otherwise you may miss calls you actually want to get. Keep in mind that Do Not Disturb mode silences the i. Phone completely, stopping the i. Phone from ringing or making any alert sound, and preventing any contact attempt if someone is not on your Favorites list or in the Contacts list, assuming you chose either of those options. Because of how this is designed, Do Not Disturb mode is an excellent feature but its generally best used on a schedule so that it kicks in automatically in the evening and turns off automatically in the morning, but some people like to have it on all the time. It is also highly recommended to enable the Repeated Calls option in Do Not Disturb mode, since it is unlikely that anyone outside of an emergency situation would repeatedly call the i. Phone. Obviously if you have no contacts list and nobody in your favorites list, you may want to either add the people youd like to talk to the i. Phone, or reconsider using the Do Not Disturb trick to block unknown callers. If you just enable this without having a sufficient contacts list, you will basically be blocking every call to your phone, which is not what most people want to do. Just think, how many times have you actually answered an Unknown caller or No caller ID number and had it been something important or something you wanted to talk to For me anyway, its 9. I can think of only once where someone I actually knew manually blocked their i. Phone number from appearing on caller ID with the 6. Blocking Unknown and No Caller ID calls is really low hanging fruit, but Apple has yet to offer a direct solution to this, so in the meantime try out this Do Not Disturb trick. Phone those methods require a little hands on work, but theyre effective as well. Another trick that used to work was to create a contact called Unknown and No Caller ID and block those contacts specifically on the i. Phone, but that does not reliably work, so if you really want peace an quiet and to stop the unknown callers from hounding your i. Phone, use the Dn. Hide-Phone-Number-2.jpg' alt='Best Software For Caller Id Blocker' title='Best Software For Caller Id Blocker' />D method instead. Have another solution you use to block unknown calls on your i.