Yes 4G is always on VoLTE.. no 3g or 2g fallback..

Prosibu is talking digi case because they have 3g and 2g network to fallback to...

Alright, so I borrowed a Nokia phone which has VoLTE on Digi all this while.

I went into the Engineering menu (*#*#4636#*#*) and forced to LTE only.

The VoLTE disappeared. Conclusion:.cannot LOCK to LTE only if you want to use VoLTE. It's the way the LTE devices are set up. I stand corrected.

Got anyone said ur statement wrong?
I agree with ur statement hor..

i was googling further when gogo2 said he couldnt get volte working when locked. i thought volte is separate band than whatever band the device was locked to. no luck on the band thing.

it wasnt logical, but even us's telco sites mentioned it requires both side to be volte.

my phone supports volte, but i'm not bothered to validate.

This post has been edited by cicak.fakir: Sep 13 2018, 10:08 PM

force lte only with samsung, still have volte though.

i think prior to volte intro memang need both side volte. iinm-lah. but it somehow change later on.

now that makes sense.
so probably, those that locked to specific 4G band eventually had to step down due to weak signal, but since it's locked, failed. and all were under impression that it is volte that failed spectacularly.

It's easy to try. You can call landline and see if it fallback to 3g.
If it stay at 4g, it's volte.

I have fullbar lte locked in both lte band. Your theory not making sense.

Edited:- let's see how long you take to make up new theory

This post has been edited by gogo2: Sep 13 2018, 10:26 PM

guy just want ask if download more then 1TB of data does it will decrease then speed of my DiGi Infinite? cause i'm heavy downloader.

what is being conveyed is, if the 4G signal is not fit enough to hold volte conversation, only then it will need to fallback to 3G similarly as if volte is never available in the first place.

But I am having full bar so fallback to 3g is a nonsense theory. Also why everyone using B618 locked band cannot use Volte? All of us suddenly need to fallback to 3g? I think thats loads of bull.

This post has been edited by gogo2: Sep 13 2018, 10:28 PM

my i150 is in b315. not volte-capable in the first place.

my phone is on celcom and maxis. capable, but not bothered since i'm not on-screen when a call is on-going.

Then let me tell you that volte works when I call landline. Hope that helps.

hey, i'm not doubting what you are experiencing. cool there.

my theory is that, probably volte is on separate band than what you are locked to? ive nothing yet to support nor debunk. probably prosibu knows better.

my place have digi 4G on 900fdd and 1800fdd. the 900fdd is only 2 bar while the 1800fdd is full bar.

if i use hmanager to lock to specific 4G 1800fdd, no call can go out nor ring in.
if i set 4g-only via hilink (i.e. any available 4G band), it will step down to 3G though when making or receiving calls.

btw, any idea what happened to the upfront payment if port in fail for some reasons?

Nope. It still use the same lte band. It just use 4g data to send your voice to base station. Something like Skype, Whatsapp etc.

Y it is related to full bar or no.
What i wanna tell is the phone must tell the network it is able to handover =.=
Not drop to 3g...
U know what is difference between handover and drop (fallback)?....

For maxis n celcom, user will drop to 3g to make and receive call
For others, volte user will handover to 3g if there is weak LTE coverage.

U can say me wrong if u can get volte if u force the band to 4g band only
Else we are actually on same channel ...


U explaining about volte or ott based voice call?
For volte, UE will use diff path to reach ims network

When ue attach to 4g network, phone will tell network that it can support data and voice over ps.
Network verify that it can support voice over ps and inform UE.
Then now is all UE call
1st scenario: if the mobile data at UE is enabled, network will create a path for internet (using data apn, celcom is celcom3g, um is um3g, digi is diginet)
2nd scenario: if the volte calls at UE is enabled, UE will trigger to ask for path to register volte. (So far all telco in malaysia using ims apn)

Means data and volte are 2 diff thing, we can verify by disable mobile data to check whether the volte icon still there or no

This post has been edited by prosibu: Sep 13 2018, 10:56 PM

1. That’s why I told you there’s no weak lte coverage at my area
2. In iPhone you need to enable data with voice to get volte. They are the same thing.

Mmm...i guess Samsung works differently.