Learn how to add and manage contacts, as well as make one-to-one or conference calls on your Firefox OS phone.
Kọ́ bí a ti ń ṣàfikún àti ṣàkóso àwọn olùbásọ̀rọ̀, àti ṣiṣé ọ̀kan-sí-ọ̀kan tàbí ìpè àjọrò lóri fóònù Firefox OS.