Bug 866378 - [OPEN_]It does not have ringtone when receiving an Unknown number call and can not answer this call.
Merge pull request #9511 from gtorodelvalle/dialer-bug-866378-number-can-be-null

Bug 866378 - [OPEN_]It does not have ringtone when receiving an Unknown number call and can not answer this call (r=jmcanterafonseca)