A:Answer Okay . Spoke to Motorola Support and T- Mobile Support. This phone purchased Unlocked for all the Carriers etc., does not have the Enhanced LTE calling features/menu such as VOLTE or HD calling . Using it on T-Mobile it does however (transmit) make & receive Voice calls over LTE( if you are connected to the LTE network) and at the same time you have Data over the LTE network even while in a call. It also,has a toggle for Carrier Video Calls and WiFi Calling. But you won't get VOLTE/HD ( HIGH DEFINITION) calls but the call quality with T- Mobiles new 600 and 700 mhz
Bands/Frequencies is very clear. And this phone is loaded with all the band's you can think of for all Carriers. It seems that either Motorola and or the Carriers only choose to add the HD/VOLTE advanced/enhanced calling features to their branded carrier phones. Which I do not think is right. And of course you are not told this up front in the phone specs or features when looking online or in store at these Unlocked Devices.
Motorola stated Enhanced LTE calling features were not in the phones menu ( Unlocked Version ) and T- Mobile stated they did not support the Enhanced VOLTE/HD calling on UNLOCKED PHONES except for like 2 specific unlocked phones.
So take notice. I can not speak for VERIZON , SPRINT or AT&T on UNLOCKED PHONES but it may be an issue with those carriers also.