MOT/Phone app for iPhone and iPad

MOT/Phone is SIP client softphone that let you use your iPhone to make an extension call.
MOT/Phone supports AMRNB and SILK codec for better voice quality over mobile network.
It is used in conjunction with MOT/PBX (IP-PBX) system or MOT/TEL service.

Basic Features
MOT/Phone has a basic features of a business telephone, including the following:
* Call via NTT-HIKARI and Japanese ITSP(050 Number)
* Integrate mobile phones into your offices phone extension network.
* Integrate iPhone Contacts into MOT/Phone.
* Call history
* Call hold, attended transfer, park hold.
* Onetouch-key dial. (Speed dial)
* Re-dial by pressing dial button for a while.
* Ring tone settings.
* Bluetooth headset. (Only voice input/output available)
* Multi Domain. (Can be registered to two SIP server)

Application Consideration
* iPhone5s, 6, 6 Plus, 6s, 6s Plus, 7, 7 Plus, 8, 8Plus, X, Xs, Xs MAX, XR, 11, 11 Pro, 11 Pro Max are supported. iOS 10 or higher supported.
* iPhone3G, 3GS, 4, 4S, 5, 5c, iPad and iPod touch are not supported. (You may install MOT/Phone but not supported by us.)
* You cannot select ring tone saved in iPhone. MOT/Phone provides specific ring tones.
* MOT/Phone has own call history and which is differ from iPhones call history.
* If you receive a mobile phone call while youre talking with your friends using MOT/Phone on mobile network,
the call with your friend might be disconnected due to communication restriction by mobile network operator.
au (One of Japanese mobile network operator) has this restriction but Softbank doesnt have it.
* MOT/Phone might not receive a phone call immediately via mobile network due to its condition or specification.
* You might meet a problem if you use MOT/Phone and another VoIP application such as Skype at the same time.
* Please subscribe flat-rate monthly charge service which enables economical use of packet communications.
* iOS 5 and 6 might disconnect it from WiFi on sleep mode. This disables MOT/Phone from receiving incoming call.
* MOT/Phone drains battery faster.