Well, when your phone rings and on reaching out to check who is calling just to find out it is a private number calling! That is damn annoying, how can someone call and expect you to pick while using a private?
In most cases, majority of people hardly pick such calls. This is because the private number person might be associated with theft, but then again how can you pick a call that you do not who is calling? It is just impossible
To get out of this mess, you can simply know who is calling by waiting their call to end and immediately dial the code *30# and an sms will be sent to your phone containing the number of the caller.
If you are not familiar with the number of the caller, you can find out using the truecaller app. This app will give you his/her full names and at times location of the person.
Also if you are fed up of the private number callers, you can assign ring tones to the close people of your circle. Mostly, these people should be those who call you more frequently, so that when your phone rings you can tell even before picking