Hi.......thanks for responding!
Wait.........which exact Xperia phone do you have, and is it a U.S. version or int'l? I know it can't be the XZ3 as it (the U.S. version) doesn't get released on Amazon until next Wednesday.
Ok wait.........nevermind. Your signature logo tells me you have the 2017 XZ Premium. But is it the U.S. version or int'l??
Ok that is interesting about your phone showing the option to enable VoLTE with your co-worker's AT&T SIM card too. I'm sure if it actually showed up as an option that wasn't grayed out then it should definitely work too.
I wanted to know if a company like Sony didn't certify VoLTE with AT&T, would people who use their phones on AT&T's network get full access to ALL of AT&T's radio bands or no. If what you're saying is true, then perhaps they do? I don't know. lol
Oh wow, cool!
So basically you're running a U.S. version then it seems, which is helpful.
Ha! Of course he is. Just my luck! lol
It's fine. I have T-Mobile, but thought that was a "dead issue" since Sony ONLY OFFICIALLY certified the XZ1 Compact with T-Mobile. When he gets back that would be cool if you could though as I have a friend who has AT&T and would like to know.
I guess I'm just shocked b/c this site doesn't have any information about really any recent Xperia flagships having VoLTE (and therefore access to Band 12/700 MHz). So you've tested your phone out using some kind of app to confirm that it can ACTUALLY access T-Mobile's Band 12 spectrum?? And I assume it stays on 4G LTE during calls too? (Please kindly answer both questions.)
Even if all this is true, what sux is the XZ3 (all versions) apparently DOESN'T have Band 71/600 MHz (under 4G LTE) spectrum programmed on it, regardless of version. And according to a recent update from T-Mobile, my area (Chicagoland region) is about to get that exact radio band by like the end of the year. Uggh.........f'ing Sony Mobile! lol
Yes, that's the app, LTE Discovery! I couldn't remember the name of it earlier. lol
Did they finally add Band 71/600 MHz to its list of bands it can detect??
So can I presume that 4G LTE & LTE+ are the exact same thing??
Ok but what about Band 12 though? That's the band that T-Mobile is supposed to require VoLTE certification for in order to access it. An LTE Discovery screenshot of that (must be during a call) would be great actually! You I believe can access Band 12 for data, but the thing I care about is having access to it for calls.
And ok your profile says you're from or in Manila?? I'm confused. lol I hope it's just from b/c if you're not in the U.S. then this info is kinda useless to me. lol
I checked and LTE Discovery does NOT currently offer Band 71 detection at this time. So I e-mailed the developer a few hours ago and requested it. Hopefully they add it soon so I can detect Band 71 when it hits my area in the next few months.
Thanks again for all your input! Much appreciated! I will check back with you in a couple weeks. In the mean time, I'm honestly CONSIDERING buying the U.S. XZ3 off Amazon (gets released next Wed) and testing it out myself. LOL I get Band 12 in my condo elevator and parking lot too sometimes, so I should be able to get a screenshot of the phone in Band 12 DURING a call via LTE Discovery when it's detected. But I doubt I'd keep it up cuz no Band 71. FML! lol Still, I'd wanna know for myself so that perhaps when the XZ4 comes out (or XZ3 Premium) if it will have Band 71 and VoLTE confirmed, I will most likely buy & keep it.
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