MOSA APP為免費的SIP電話，透過註冊MOSA IP-PBX可撥打VoIP網路電話，也可撥市話、長途、國際電話。
功能與特色：
1.免費的APP軟體
2.設定操作簡易、介面容易上手
3.整合手機內原有的通訊錄
4.SIP通話紀錄
5.通話品質佳
6.多組撥號規則可設定
MOSA APP for free SIP phone, through registered MOSA IP-PBX can use VoIP call, also can dial the local call, long distance, or international call.
Function and features：
1. Free SIP Client
2. Simple setting and easy use
3. Import Phone Address Book
4. SIP call records
5. Good quality
6. Dialing plan can be set