VoLTE - Xperia Z1 Compact Q&A, Help & Troubleshooting

Hi all,
From what I've read, the SD800 chip in Z1c has VoLTE support and so has Android since Lollipop. Yet I've found no reliable report about getting it working on this phone.
Do you have some experiences with it, or is there some technical detail that I'm missing out?
And finally, is it just me or is it looking like it's enabling a tremendous carrier lock-in with the blacklist mechanism in place effectively preventing people from switching carriers by applying blacklist mechanisms?

Related

VoLTE how do we turn on?

I see some people saying they already turned on their VoLTE, how does one go about doing this? I'm on the latest Kernel, running the latest PacMan ROM.
Sent from my SM-N900T using XDA Free mobile app
It's in call settings. Isn't pacman AOSP? it might be limited to TouchWiz roms.
Sent from my SM-N900T using Tapatalk
you need to return to stock in order to get the volte. when you try to restore via KIES it will ask you if you want to upgrade to the ne6 baseband. click on yes and be patient
So we can't use custom roms to get volte? We have to stick to stock rom?
visiovis said:
So we can't use custom roms to get volte? We have to stick to stock rom?
Click to expand...
Click to collapse
Correct
PhilPan said:
I see some people saying they already turned on their VoLTE, how does one go about doing this? I'm on the latest Kernel, running the latest PacMan ROM.
Sent from my SM-N900T using XDA Free mobile app
Click to expand...
Click to collapse
Volte will not and does not work at all if you are using Pacman rom
or any other AOSP, AOKP, CM or ported roms.
You will need to flash a Samsung N900T Kitkat 4.4.2 Touchwiz stock or
stock based custom rom if you want to get the Volte feature working.
Good luck.
yea i tried flashing all the different options/roms trying to figure it out. only the stock telco rom works for volte. thanks
XtreStoLite custom rom
visiovis said:
yea i tried flashing all the different options/roms trying to figure it out. only the stock telco rom works for volte. thanks
Click to expand...
Click to collapse
I have been searching for custom ROMs that can do VoLITE and i think I found one called XtreStoLite but I do not think it will work yet on your device. Someone told me something about wrong kernals, and until they make it install from a universal zip it is not workable yet.
But I would keep an eye out on that one and I think they are going to soon come up with more custom roms with volte.
:fingers-crossed:
***voLTE, WiFi calling, Tmobile***
=======================================
(linked from "David Ruddock, XDA" )
T-Mobile Unofficially Speaks To Us About Band 12 LTE / VoLTE And Unlocked Smartphones,
And Yep It's Still Confusing
-----------------------------------
Yesterday, we published an article asking an open question: what is up with T-Mobile band 12 support being removed from some unlocked smartphones?
Today, T-Mobile contacted us to speak about said article. Unfortunately, T-Mobile was unwilling to provide any official on-record responses to our questions. But after a short discussion, I can provide you some information I have learned on background (journalist speak for "cannot be directly quoted or attributed to anyone"). First:
On T-Mobile, any device on its network with band 12 LTE data support must also support T-Mobile Voice over LTE services and E911.
The E911 part isn't particularly important in terms of the certification requirement - all phones sold in America are technically E911 compliant, because by law they have to be. The problem is that E911 compliance is inextricably linked to T-Mobile's VoLTE requirement for band 12. Without VoLTE support, a device on band 12 service would be unable to make phone calls of any kind if no other T-Mobile band was available (it will not know to fall back to AT&T roaming - the call will just flat-out fail), and that would include making 911 calls, meaning the device would for legal purposes likely be out of E911 compliance, and T-Mobile could get in trouble with the FCC. Not to mention, you could have somebody trying and failing to dial 911 in an emergency, which would of course be terrible. And yes, by removing band 12 support, you can make E911 work, because the phone then has no signal at all and knows to try to roam onto another compatible network (AT&T usually) to complete the call. This is both a safety and liability issue, and it is easy to understand where T-Mobile would be coming from in terms of concern about this - they do have something of a history with E911 debacles. Clearly this is a very real safety concern, and I do sympathize with T-Mobile in the sense that they obviously can't just sit here and do nothing about it. But there are practical concerns for OEMs here - adding T-Mobile VoLTE isn't just as easy as flipping a switch.
In order to obtain VoLTE compliance for band 12, phones must go through T-Mobile's rigorous network certification process (and yes, unlocked phones can go through this certification).
Speaking off the record to one major smartphone vendor, we have learned that there are very real costs and complexities associated with obtaining that certification, and it must be done on a device-by-device basis. Many phone OEMs, then, may simply choose to remove band 12 support from their unlocked smartphones sold in America. This could mean phones like the Alcatel OneTouch Idol 3 (4.7 and 5.5), the Huawei Ascend P8 Lite, the Huawei SnapTo, OnePlus 2, Moto X Style (aka Moto X 2015 PE), Moto X Play, HTC One M9 Unlocked and Developer Edition, Saygus V2, and various imported phones (ie, some global unlocked Sony or Samsung devices) or unlocked branded AT&T phone models may lose band 12 support in future software updates. The fact is, we don't know what will happen, or to which phones, or when. Some manufacturers may choose to get T-Mobile VoLTE certification (Motorola has hinted as much with the new Moto X 2015 PE), but many may also simply choose to quietly disable band 12 for T-Mobile in software updates. Motorola, as we know, has already done this with the Moto E.
It is not clear what action, if any, T-Mobile will take if a smartphone vendor refuses to remove band 12 data support from their device and also refuses to undergo the T-Mobile VoLTE certification process. (Ie, they want to keep B12 data but not bother with B12 VoLTE certification.)
This is basically the kicker. What will T-Mobile do if a vendor says "no way" to dropping band 12 data, but also doesn't want to go through the VoLTE certification process? We don't know. They might not do anything. But they might do something. Again, this is why speaking to T-Mobile about this situation was so frustrating. Not only we were unable to directly quote or attribute any of the information we were provided, but there was also no clarity as to what would happen in the event the band 12 situation comes to a head with an OEM that refuses to "play ball."
It seems unlikely that any OEM would refuse T-Mobile's request here, though, as most of them are also partnered with the company on T-Mobile-branded devices.
We have asked T-Mobile again for an on-record statement about this entire situation, because it would help clarify it immensely. As things stand now, T-Mobile is attempting to put the ball in the court of manufacturers. Which, to be fair, manufacturers do have a role to play here - they have to make the decision to drop band 12 or go through the T-Mobile certs for these unlocked band 12 devices. Or, potentially, just ignore T-Mobile's band 12 requirements entirely and see what happens. Unfortunately, as you might guess, most smartphone OEMs have zero desire to discuss upcoming software updates in detail, or to ever put their product in a situation where it is being highlighted for losing a feature. That makes our job here a difficult one.
We will update you on any more information we receive about this situation, including any response from T-Mobile or potentially-affected device manufacturers we have reached out to.
---------------------------------------------------------
hey there, im using galaxy note 3 t-mobile running on AOKP rom android 7.1.2 with synergy kernel, the problem is when i switch my network to LTE from GSM, my device getting freezed and unresponsive after 3-4 minutes, this occured in Resurrection Remix and Linage OS, can anyone help me fixing this problem? and i dont want to go back to stock rom, thanks in advance

Unlocking bands

Hello!
New user here and well, I was wondering if there's any chance that we'll be able to unlock phone bands in this device!
I also know it's probably still unclear as the phone is still new but another user said in another topic that there might be something considering OPO had some tools to unlock bands! So if anyone knows anything about this issue it'd be great!
I'd love to have B28 available on the OP3!
Thanks!
I'd say the reason of the limited LTE band selection is no other than to reduce costs in the hardware. Every band requires it's own amplifiers so making the devices regional it's an easy way to cut corners and not affecting people much (if they don't travel)
bartolo5 said:
I'd say the reason of the limited LTE band selection is no other than to reduce costs in the hardware. Every band requires it's own amplifiers so making the devices regional it's an easy way to cut corners and not affecting people much (if they don't travel)
Click to expand...
Click to collapse
I can understand the reason, but it still seems meh to me.
But who knows, maybe there will be a workaround!
hey, ive been looking at buying an OP3 but did read that band 28 is missing which is used for faster and longer range 4G in australia and also common in the rest of asia & some of europe
weird, in this teardown it says the radio can do band 28 ? maybe its just disabled/unsupported?
http://www.slashgear.com/oneplus-3-teardown-part-ii-whats-inside-28446199/

Need help - issues with dual sim phone use in Canada

Hi all,
I've asked similar questions in the past but I never really managed to solve my issues; I bought a dual sim variant (G960FD) because I have two phone lines (work and personal) and I love the convenience of two lines/one phone. I actually really like this phone, but there are several small things that don't work in Canada because it's on a foreign phone SCS such as Samsung Pay, block SMS by keyword (yes, that's a localized feature apparently) and a few minor things like that.
I could totally do without these things, but since I got it in late April I have to admit that the reception is just garbage! And I know it's the phone: I'm on a major carrier - Rogers, my APN settings are all according to spec, I'm in a large urban centre - Ottawa, and my S7 had rock solid 4G signal. The S9 is really, really spotty: I'll get full signal signal one area, then literally two streets down, no bars! That's not normal! Dropped calls, unsent SMS, sloooooooow internet and the list goes on. It's to the point it's almost unusable as a phone!
But here's the thing: unless I missed something, all my carrier's LTE bands are covered by this variant - on paper at least - so what the hell is going on? I doubt the phone is defective because I had a similar experience with a dual sim S6 back in the day, but I didn't keep that phone very long for other reasons.
So... can anyone give some kind of idea what I've missed as far as compatibility, and/or how to fix it, and/or if there's a ROM I could install that would solve this without losing dual sim capability??? Anything would help!
Thanks once again guys

AT&T Network Upgrade: Incompatible Phones?

I just received this email supposedly from AT&T:
We will soon be upgrading our network to use the latest technologies. These updates are to serve you better and bring faster speeds and greater reliability. ​ But your device ending in *XXXX is not compatible with the new network and you need to replace it to continue receiving service. Our team is here to help you find a compatible device that fits your needs. We want to help you transition as seamlessly as possible and ensure your service is not interrupted.​
I've never heard of something like this before. It is fallout from AT&T only supporting "basic" phone functions unless you purchase an AT&T phone? Are the days of "Bring Your Own Device" over for good? It might be time to call my congressman and/or senator . . .
Any thoughts about this tyranny?

ROMS that support full calling (VOLTE, VOWIFI, etc)

I'm new to the Pixel 3 community, so forgive the noob question.
I've heard mixed reports about the latest A12 updates, and in general I know support is ending / has ended for future OS upgrades on this device, so I'm considering going aftermarket. I'm nervous about losing Volte though, as where I live T-mobile really requires that for a half-decent calling experience.
In the past, going with Lineage and similar AOSP roms lost VOLTE and VoWIFI calling. Are there are good aftermarket ROMs for this phone that keep all the stock network functions?

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