Hi Guys,
My personal device (Nexus 6P), which i bought in USA and use VoLTE features through T-Mobile Network (i can say, very smooth). When I back to Brazil, try to test Nexus 6P on our test bed (All VoLTE features are supported), but failed. These are the technical symptoms:
1 - During the attached procedure, attach request message came with the following set: voice centric is cs voice prefered and ims voice secundary. It means, that the voice must go preferentially trough CS network instead IMS. Another issue is, device do not request create the second session (pdn connectivity request), only being attached on PS and CS network (combined attached).
2 - Subscrition on IMS-HSS/SAE-HSS is ok. Same IMSI worked with others devices.
3 - Checking the hidden menu (*#*#4636#*#*) the provisioning flag is already marked and even if i try to toogle, nothing changes.
4 - There are two frequencies, already test on band 3 (1800 Mhz) and band 7 (2600 Mhz). Both supports VoLTE.
Does google allowing Nexus 6P support VoLTE just in a specific network based on MCC+MNC? If yes, is that possible request to add more MCC+MNC? Or is it possible enable by software update (patch)?
Thank you
Anyone? Nobody faced this problem before?
Related
So I've confirmed today that there is in fact an LTE issue with the Galaxy S4 Google Play Edition, and thankfully, it's software based. Hopefully, Google and/or Samsung implement a fix in short order. In the meantime, here's the cause (so that you can prevent the issue), and here's the workaround (so that you can correct the issue if you're affected).
Background:
Comparing the Google Play Edition to the Touchwiz Edition, there is a setting that is slightly different on both phones. If you go to Settings --> Wireless & Networks --> More --> Mobile Networks --> , you will see a setting; either "Use only 2G networks/saves battery (GPE)," or "Network Mode (TW)."
The Network Mode on Touchwiz allows you to toggle between available network modes based on carrier, usually 3 individual settings and a full Automatic setting. The 2G Networks setting on the Google Play Edition is the cause for concern here. It's directly ported from the Nexus 4, and here's where the problem lies.
Cause:
While both devices have numerous hidden network modes, the toggle only allows for you to switch between two modes; GSM Only, and WCDMA Preferred. GSM Only occurs when the box is ticked. This sets you on Edge-only for battery savings. WCDMA preferred tells the phone to look for GSM/UMTS (Edge/3G/H), but to prefer the latter if both are available, even if the latter has a weaker signal. Did you see LTE in the equation? If you noticed that it's absent, here's why.
The S4 has an additional mode; LTE/GSM (Auto PERL). This sells the phone to switch between LTE/H/3G/Edge based on signal strength and T-Mobile's/AT&T's APN settings and roaming list. The S4 GPE comes with this mode on by default. If you tick the 2G box, you'll go to Edge only. If you untick the box, instead of going back to LTE/GSM, you are sent to WCDMA Preferred. Now, you're stuck between 2G/3G/H, or 2G only. LTE is gone. Nice oversight by Google/Samsung
The "Fix":
Because this is an issue with the firmware, there is no permanent fix. However, there are easy user-facing applications that will allow you to toggle LTE back on. The one I'm using is LTE Setting (Google Play Link). From the main page, go down about 2/3s of the way and you'll see a drop-down menu. Select "LTE/GSM (Auto PERL)" to restore LTE. Now, the next time that you set your phone to 2G Only for the sake of battery savings, you'll need to use this app again to restore LTE compatibility.
I've enclosed two pictures. The first is the setting as it appears in the Google Play Edition. The second is as it appears in a Touchwiz model, and why the Touchwiz variant does not have this problem.
i had this problem when i have flashed 3 various roms so i have to flash back a rooted stock rom which you can find in this forum (in my case XXUBMGA). after flashing i checked Settings --> More (under wireless) -->Mobile Networks and there shoud be 4 choices 1. LTE/WCDMA/GSM (auto connect) 2. WCDMA/GSM (auto connect) 3. WCDMA only and 4. GSM only. i checked no.1 to see if it worked (after rebooting). then there was no 4G connection on the status bar, so i begin to search for the answer in this forum also. here's a list of what i did to solve my problem.
1. i asked my carrier for an LTE capable SIM (micro SIM)
2. i see to it that there is an LTE coverage in my area for testing
3. LTE is activated in my prepaid account which is separate from internet access.
4. (optional) in settings/more/mobile networks/networks operators i selected manual because it drained my load when my network is not available when connection to LTE coverage of another network.
5. asked from carrier the correct APN
of all the listed steps i made above, it was the SIM card that was at fault, because my carrier gave me a normal sim but was just cut to a micro sim so i insist to have a pre manufactured micro sim. you can google for answers but i don't think this is a bug. i have read plenty of lte issues during my search and all point to coverage, SIM card and requesting the carrier for an LTE activation on your account.
hope this helps
I've edited the original post for clarity. I apologize for any confusion that I have caused.
Bug has been submitted to and acknowledged by Google. It's evident in the latest 4.3 leak, so no idea if the fix makes it into the final push, or a subsequent update.
Bug has been fixed as of last night's OTA to 4.3.
I have a SGS5 (SM-G900F) downgraded to Kitkat. (4.4.2)
I can use LTE with one operator A (4G shows in statusbar, speedtest measures above 50Mbits).
I bought a sim for operator B but I cannot switch to LTE mode in Mobile Data Settings -> Mobile Networks -> Network Mode. Any option with LTE is simply not available.
I tested the sim for operator B on an iPhone 6 plus, it works just fine.
I have found some guide for secret codes and walked through it to force LTE. It works, but it does not switch to 3G automatically when I receive a call (it does this with the card of operator A)
So I know that my phone does support both operators frequency bands, I can force it to work, but I want to have the convenience of automatic switching on a phone call.
Is there a list somewhere in the software that has flags for networks to enable and disable LTE options in the menu ? Can I edit this ? Where is it ?
Will updating my Android version fix this ? ( I would really prefer to avoid this, since I use SnoopSnitch )
Operator A is: Vodafone (DE), A1 (AT)
Operator B is: HoT (AT)->MVNO for T-Mobile (AT)
How to speed up jio connection?
I am posting pre configuration also as well as in case pre configuration not work you can try at your own hit and trial method.
Pre config -
I am not providing any downloadable files or content. This process needs root and volte supported roms. Custom lineage and its based roms still can have issue. It will work best on eui roms ( stock and customs) .
App need -
Net guru (free) - download
1. Download net guru app. And give root access . It will take some time for configuration.
2. Wait untill it shows LTE testing.
3. Now go to menu and select lock bands.
4. Now select LTE and select "B3 1800+" band.
5. Restart and. Enjoy new speed.
Reason to lock only this band -
Coverage + speed too.
Check speed by trai app.
If above method don't work then follow till 3rd step and now select 3 individual bands at which jio works and check your speed at individual bands and lock them at your most preferable band.
Details about bands:
Jio is using 3 LTE bands for 4G:
Band 3 (1800Mhz),
Band 5 (850Mhz)
and Band 40 (2300Mhz)
If LTE Bands are arranged according to services then
Best 4G coverage*: Band 5 > Band 3 > Band 40
Best 4G Speed*: Band 40 > Band 3 > Band 5
Average 4G speed*: Band 40 : 30mbps+Band 3 : 14mbps+Band 5 : 5mbps+
Extra -
1. After Deleting app band locking still works.
2. Restarting doesn't affect band locking.
3. Updating roms or changing also not affect band locking.
4. It's not necessary band 3 will give you more speed or coverage try according to your area. Mine is most suitable at B3.
Working - Sim - up. Working in Delhi, haryana and up.
Post your results.
Thank you bro
If you will use this trick then you both incoming and outgoing call will not work at the time of data connection ,you have to switch to flight mode to enable again
rockingboy said:
If you will use this trick then you both incoming and outgoing call will not work at the time of data connection ,you have to switch to flight mode to enable again
Click to expand...
Click to collapse
No issue here. Receiving calls and everything working fine.
Hello Xda community
i recently bought a9 pro a910f international version from Aliexpress
the first thing i did is updating the software via ota from originally nogut to
also nogut but apparently a small update.
My problem is i can get only 4g/lte but i cant make or receive any calls ???
if i switched from network mode to GSM Only i could make calls but i lose internet.7
i have Lycamobile sim card , i live in Belgium
do you think its fault in software , i already flashed and downgraded and upgraded through
odin and using original firmware without any luck
i think its band issue maybe a9 pro is not compatible with my service provider
but i am not expert there
Help please
Sir you can download other firnware that works on you country and flash via ODIN is easy or just flash other modem but need more instructions
Thank you very much for your reply
I tried 3 original firmwares so far but no use.
You said something about modem ?
I have no idea about that ? Is it not already in the firmware ?
I flashed 2 firmwares: Malaysia and India using 4 files method with odin.
But with no use.
I will try to flash all other regions .
But i think it could be hardware fault?
To make or receive calls on 4G, at least one of these have to be working:
CSFB (circuit switched fall back) from 4G, where CS is not available, to 3G or 2G;
VoLTE/IMS (voice over LTE,4G);
VoIP software...
Below: 4G=LTE, 3G=UMTS/WCDMA, 2G=GSM. Those are 3 RATs, selecting only one is sometimes "RAT lock".
4636 can usually be opened without root.
Set network to 4G/3G/2G in the settings app, not 4G(LTE) only.
Set network to LTE/UMTS auto (PRL) in 4636, should also CS to 2G.
Set network to LTE/WCDMA in 4636. (4G/3G).
Check CSC features for anything related to this, remove or modify if rooted.
Check current CSC, install, open stock recovery.
Install CSC with VoLTE (IMS 'APN') set up for the mobile network operator, if available.
Disable VoLTE provisioned in 4636 if it's not available?
CS could be disabled in the menu, probably not, (*#2683662#, etc) Example, in this example CS is disabled, leaving only PS (data). (Exynos! Likely differs on Snapdragon) UE Setting and Information > Setting > Protocol > NAS > CEMODE Setting > [3]CEMODE0(PSonly/DC)(*), UE Setting and Information > Setting > Protocol > NAS > Network Control > SERVICE DOMAIN > [3] PS ONLY. Edit: it works on GSM.
Ask the mobile virtual network operator about "circuit switched fall back", have the question elevated to the ones higher in position.
Etc.
Bryan48765 said:
To make or receive calls on 4G, at least one of these have to be working:
CSFB (circuit switched fall back) from 4G, where CS is not available, to 3G or 2G;
VoLTE/IMS (voice over LTE,4G);
VoIP software...
Below: 4G=LTE, 3G=UMTS/WCDMA, 2G=GSM. Those are 3 RATs, selecting only one is sometimes "RAT lock".
4636 can usually be opened without root.
Set network to 4G/3G/2G in the settings app, not 4G(LTE) only.
Set network to LTE/UMTS auto (PRL) in 4636, should also CS to 2G.
Set network to LTE/WCDMA in 4636. (4G/3G).
Check CSC features for anything related to this, remove or modify if rooted.
Check current CSC, install, open stock recovery.
Install CSC with VoLTE (IMS 'APN') set up for the mobile network operator, if available.
Disable VoLTE provisioned in 4636 if it's not available?
CS could be disabled in the menu, probably not, (*#2683662#, etc) Example, in this example CS is disabled, leaving only PS (data). (Exynos! Likely differs on Snapdragon) UE Setting and Information > Setting > Protocol > NAS > CEMODE Setting > [3]CEMODE0(PSonly/DC)(*), UE Setting and Information > Setting > Protocol > NAS > Network Control > SERVICE DOMAIN > [3] PS ONLY. Edit: it works on GSM.
Ask the mobile virtual network operator about "circuit switched fall back", have the question elevated to the ones higher in position.
Etc.
Click to expand...
Click to collapse
i am completely lost
what is 4636 ? how can i open it ?
what should i google
you seem quite knowledgeable about this
can you point me to what should i google about please ?
mhd1st said:
i am completely lost
what is 4636 ? how can i open it ?
what should i google
you seem quite knowledgeable about this
can you point me to what should i google about please ?
Click to expand...
Click to collapse
4636 is basically a menu that comes with Android that allows the selection of network modes for SIM 1, including those that are not available in the usual settings. It has a few other features, but it's not relevant to this. On Samsung (Gingerbread, etc) , it was previously launched by *#*#4636*#*# in the phone app, like other devices. In the network mode "LTE only"/"4G only", calls by circuit switched fall back aren't available (can't automatically switch to 3G or 2G). If it's not changeable in the usual settings, look for it there.
How to open it? Well, there are many apps that open 4636, both with, and without root. Not necessarily the menu before it "Testing".
What to Google... anything above?
thank you for your efforts trying to help me
i tried those but still not working
Set network to 4G/3G/2G in the settings app, not 4G(LTE) only.
Set network to LTE/UMTS auto (PRL) in 4636, should also CS to 2G.
Set network to LTE/WCDMA in 4636. (4G/3G).
the first picture is before i try to calling to my phone from another phone
the second picture is after i call the phone from another phone
how to : Check current CSC, install, open stock recovery ?
READ THE [UPDATE] DOWN BELOW
Many Note3 Korean Variant users also reported this case
https://forum.xda-developers.com/showthread.php?t=2484602&page=115
The problem is that, I can't connect to LTE without losing my Network Radio Service Connection. I can connect to E/G/3G/H/H+ and still have network service, so I can still make calls and text messages, but when I turn on my Mobile Data, when it tries to connect to LTE, suddenly my service gets diconnected and I can't make phone calls nor messages though I could still use the data. I've already tried 3 LTE-Capable SIMS but the issue still happens.
What I had in mind is that it might be because it is Carrier Locked since it is a Korean Variant, but the problem still persists even after flasing other custom roms (this includes Note 7 Port ROMS, LineageOS, Stock-Based ROMS).
I love my Note 3, I will do anything to keep it alive, but still this one problem keeps bugging me...
Why can't I use both LTE data connection and radio service connection simultaneously?
Is anyone out there knowledge and willing enough to help us Note 3 KV users with this issue? :crying:
[UPDATE]
I get it now, when a phone is using LTE it means its not connected to any Mobile Network Service, instead it is connected to Data Network Service, yet it should receive Phone calls and Messages but it means that the phone will disconnect to LTE and switch to GSM/WCDMA (E/G/H/3G/H+) to be able to recieve the incoming call or message. I've tried that with my friends' phones, The first phone is connected to Data and is using LTE and the other phone is trying to call the first phone. The moment I call the first phone, I noticed that the LTE icon dropped to H and then recieve the call, It only happened because the option selected on the "Network Mode" (under Settings/More Networks/Mobile Networks-->Network Mode) is [LTE/WCDMA/GSM auto connect] so that's how it works
But that doesn't happen to my phone, after turning off the Mobile Data (I was connected to LTE btw) my phone doesn't automatically connect to GSM nor WCDMA network, it just stay on LTE mode and I have to manually select the GSM/WCDMA option in order to get Network Service.
So my final question is Why doesn't my Note 3 automatically switches Network Mode?
Note 3
Model Number: N900L
Status: Rooted with Custom Note 7 Port ROM
Condition: Good, No History of Repair
Current Network: SMART Prepaid
Does it work on genuine non custom stock firmware ??
JJEgan said:
Does it work on genuine non custom stock firmware ??
Click to expand...
Click to collapse
No it doesn't, the problem is already there even before I rooted my device. Flashing stock lollipop rom on odin didn't help either
Llamas_are_Good said:
No it doesn't, the problem is already there even before I rooted my device. Flashing stock lollipop rom on odin didn't help either
Click to expand...
Click to collapse
Please start to read about LTE technology and its frenquency bands.
Then find answers to these questions :
1- My SM-N900L is locked to use which frequency bands ?
2- Wich bands are in use in my actual location (country) ?
3- Is it possible to unlock more frequency bands for my N900L ?
i can provide more help if things remains not clear enough.
Good luck :good:
zlazaar said:
Please start to read about LTE technology and its frenquency bands.
Then find answers to these questions :
1- My SM-N900L is locked to use which frequency bands ?
2- Wich bands are in use in my actual location (country) ?
3- Is it possible to unlock more frequency bands for my N900L ?
i can provide more help if things remains not clear enough.
Good luck :good:
Click to expand...
Click to collapse
I tried searching the supported LTE bands of N900L but I can't find any sites that tell exactly what the N900L actually supports though I found out on this forum
https://www.frequencycheck.com/models/AZzWA/samsung-sm-n900s-galaxy-note-3-lte-a
1) A / P / T / V models are made exclusively for the US operator market and for no other people, as their indexes hint (A-AT & T / P-SPRINT / T-MOBILE / V-VERIZON). In Europe, mainly international versions are used - in the case of NOTE 3 - exclusively N9005, in Canada - its own carrier versions.
2) The models N900S / N900K / N900L are identical in the set of supported frequencies. If you rewind the topic on page 9, you will see screenshots of one of these models, which show the frequencies you are using, in one of the screens you will see the treasured frequency of LTE b7. I think that users of this topic can be trusted with respect to information in the topic, but no one has elected you the right to believe solely on the site www.frequencycheck.com.
Click to expand...
Click to collapse
I did try checking my phone on www.frequencycheck.com, N900L is not on the list..
https://www.frequencycheck.com/models/AZzWA/samsung-sm-n900s-galaxy-note-3-lte-a
N900S though shows that it supports Bands 3, 5, and 17.
I also look it up on wikipedia on where the SMART network (my current network) falls on the list of LTE frequency bands, and it shows that it is on Band 05 alongside with South Korean Networks LGU+ and SKT. The supported LTE bands on my country are Band 1, 3, 5, 7, 28 and 41
https://www.frequencycheck.com/countries/philippines
I searched for how to unlock all LTE frequency bands on N900L or Korean Variants or Note 3 but the only option that shows up is by accessing the Service Menu on Stock ROM and manually changing the values, which still didn't work for me.
According to my search, N900L is locked to :
LTE protocol : B1 (2100) and B5 (850)
LTE-A protocol : B3 (1800) and B7 (2600)
Now try to find the specific frequency band used by your carrier (he can't use all of the six available bands in Philippines), and activate it.
Wich stock firmware do you use when trying to access Service Mode ? It must be the LGU+ one.
And what code did you dial for the same purpose ?
zlazaar said:
According to my search, N900L is locked to :
LTE protocol : B1 (2100) and B5 (850)
LTE-A protocol : B3 (1800) and B7 (2600)
Now try to find the specific frequency band used by your carrier (he can't use all of the six available bands in Philippines), and activate it.
Wich stock firmware do you use when trying to access Service Mode ? It must be the LGU+ one.
And what code did you dial for the same purpose ?
Click to expand...
Click to collapse
When you said activate, you mean select the band to be used by the phone right?
- Yes, I used the LGU+ Lollipop Stock ROM
- I typed in the dialpad, *#0011# and changed the network preference to LTE ONLY.
Llamas_are_Good said:
When you said activate, you mean select the band to be used by the phone right?
- Yes, I used the LGU+ Lollipop Stock ROM
- I typed in the dialpad, *#0011# and changed the network preference to LTE ONLY.
Click to expand...
Click to collapse
I mean activate only the LTE's frquency band used by your carrier.
Check your PM.
zlazaar said:
I mean activate only the LTE's frquency band used by your carrier.
Check your PM.
Click to expand...
Click to collapse
I've already done that, but the problem with radio service network is still present, I can't make or receive any phones calls nor messages.