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[Q] LTE and Network or SIM card error

Hello, S4 mini I9195 - Version 4.2.2
When using LTE RF band only through samsung service mode, data connection is working but impossible to establish a voice call - Always get call ended!
I've found that caller ID can be the source of the problem but when I'm going to settings->call settings->advanced it gives an error reading "Network or SIM card error." then it kicks me back to call settings
The voice calls are working when using GSM or WDCMA RF band configuration.
Any idea? My provider is Proximus in Belgium.
Thx
Pj

LTE is a data-only network technology. In its current state it doesn't support voice calls at all. So you need to have a 2G or 3G connection to make or receive voice calls.

Thx for the reply, voice over LTE is supported through VoLTE/CSFB/SVLTE and VoLGA (Wikipedia)
The questions is Does Proximus support currently VoLTE? I've asked, no answer

pommejaune said:
Thx for the reply, voice over LTE is supported through VoLTE/CSFB/SVLTE and VoLGA (Wikipedia)
The questions is Does Proximus support currently VoLTE? I've asked, no answer
Click to expand...
Click to collapse
I'm 99.999% certain they don't support VoLTE, probably haven't even piloted it yet. Some network operators have piloted the VoLTE system but I don't think there's yet a single commercial VoLTE-capable network in the world. Next year, perhaps. Patience!

No Calls come in if on Sprint LTE network and browsing internet

I have new S5. NO CALLS come in if are on LTE/CDMA network browsing internet and someone is trying to call you in the same time. Sprint had me changed to CDMA and in that case calls do come through. Anyone else has this problem?

syavik said:
I have new S5. NO CALLS come in if are on LTE/CDMA network browsing internet and someone is trying to call you in the same time. Sprint had me changed to CDMA and in that case calls do come through. Anyone else has this problem?
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Click to collapse
I have same problem.
More info here:
https://productforums.google.com/forum/#!topic/nexus/eOToYgJXdrw[1-25-false]
http://forums.androidcentral.com/ht...t-htc-one-m8-not-receiving-phone-calls-2.html
As i understand, the problem is if 4G network doesn't support voice over LTE (4G is only for data). And when you receive call, the phone that is on 4G network, it must switch to 3G. And at this switch error happens. that's why you don't get call, that's why i get SMS with notification of missed call.
Been testing between network modes "LTE/WCDMA/GSM" and "WCDMA/GSM".
When i am on "WCDMA/GSM", i have no problem..

Incoming/ Outgoing call problem while on 4G network with no volte support.

I have recently bought the MI A1. While buying itself it was updated to the latest may patch.
The problem is while on 4g network, I cannot receive nor make any phone calls. For calling I have to manually switch to 3g/2g mode from *#*#4636#*#* menu. Is this a normal behavior of this phone as my other phone swiches to 3g while incoming/ outgoing calls and back switches to 4g after the call is finished.
PS: my network doesn't support volte. Phone is manufactured on Feb 2018, it's not modified by any means.

That's not normal behavior.
I've never seen a phone where You have to switch between 3G/4G/LTE for calls and data.
Can You try a SIM-card from another service provider to see if it behaves differently?
If You check at https://willmyphonework.net/ are all bands supported with Your provider?
Or, in worst case of course, try a factory reset and see if that makes any difference...

Set to 3g/4g in *#*#4636#*#* menu.
Airtel doesn't support volte in all circles yet. Only rolled in few circles. In 3g/4g mode, it'll be mostly in 4g mode if nw strength is good & switch to 3g when you call or receive a call

Network bar is full but no incoming and outgoing calls

Hello,
i'm using redmi note 4 snapdragon 3/32 version for almost 1 year 6 months.
Suddenly i am facing network issue.
Though the network bar shows full network but still not receiving any call neither i can call others.
If i change network to gsm only it seems works for a while
but i want a permanent solution.
*i reset phone. Even tried different rom*
if this is a hardware issue. Is this critical?
Thank you.

Maybe it's related to your operator
Some operators switch from 4g to 3g or 2g when you receive a call or try to call someone
maybe your operator has a problem with this switch and so you are not able to call and receive

Angelo Azzurro said:
Maybe it's related to your operator
Some operators switch from 4g to 3g or 2g when you receive a call or try to call someone
maybe your operator has a problem with this switch and so you are not able to call and receive
Click to expand...
Click to collapse
thanks//

Calling not working in LTE

So I use my sim on roaming and I have been facing this problem that my calls only work when I set mobile network to WCDMA or lower which hence reduces my data speed coz it's 3g. What to do?

4G (LTE) services is a data-only service, and does not support voice (unless it is voice converted to 4G data or VoLTE), hence whenever you're dialling or receiving a call network drops from 4G to 3G. Happens to me all the time on roaming, sometimes even on home network with poor VoLTE connectivity. Nothing to worry about.