i have a couple of the sprint lg v50 (lgv450pm) and are stock and updated to latest firmware.
we v50 users get alot of info from you G8 users as they are very similar hardware.
we all know VoLTE does not work but lately i cant even keep the phone on the network as it always is getting knocked off especiailly when driving and switching towers.
i always have to put phone in airplane mode for about 10 seconds then turn it off and it reconnects.
anyhow my question is this.
does anyone know what would happen if we disable the 5g network from hidden menu or use some software like cdma workshop or dfs studio?
Automatic Network mode would still work fine but not try to auto connect to 5g which is what i would like to test.
i know i can manually select which network mode but then you can only get data to work or voice and i do want them both to work (although it cannot do it at same time) im ok with that.
im just tired of losing networks and not even knowing until i look at my phone and see i have no cellular or data connection at all.
i would think it might stay on the network better if we can still be in automatic network mode but have 5g disable completely so it dont even try and connect.
anyone want to try and help with this?
Related
I just bought a T Mobile LG G3 (D851) for use on AT&T. The guy I bought it from got the unlock code from T Mobile and that is all squared away and unlocked. Things are basically working on AT&T, but data is not working reliably for me. It works fine for awhile, then it just stops working--the 4G/LTE logo in the status bar disappears and I have no connectivity. I can still make phone calls and send/receive SMS texts (though no MMS texts), and if a wifi network is around, that works too. Rebooting does not seem to correct it (though it does start working again eventually).
I don't know if it is just random, but it does seem to happen after I'm leaving somewhere with wifi (and that may not even be relevant--might be that's just when I notice it).
I have verified my APN settings (as well as tried other slightly different settings I've found around the web), but the data network still drops out. Yesterday, I discovered a technique that seems to reliably bring it back on after it has dropped out. If I change the Network Mode to anything else (ex: just GSM), then back out of the network options menu... then go back in and set Network Mode back to LTE (etc). Every time I have tried this, I get the 4G/LTE logo back in the status bar and my connectivity is back.
I know there is some difference in the LTE bands supported by AT&T and the T Mobile LG G3 (D851), but the phone supports band 17, which I'm told is the main LTE band used by AT&T. At this point, I think I'd be satisfied just to have consistent 4G (non-LTE) data.
Any idea what might be the issue? Or anything I can try out? I'm considering flashing a different rom to see if that helps, but wanted to exhaust other options first.
Thanks...
I have a G3 D855 International (or is it Taiwanese?) version - running the latest stock LG build, which identifies itself as LRX21R.A1440231662, version V20u-TWN-XX, Kernel 3.4.0, Android 5.0.
I have a Three (UK) SIM, and have recently been in California, where I observed some odd behaviour. I'd be glad if anyone is able to comment or explain any of this!
1) I never saw any 4G (LTE) connections. From other posts in this forum it does appear that this model of G3 may be incompatible with T-Mobile US and AT&T network frequencies, and if so that's understandable.
2) It seemed to have a very strong preference to connect to T-MO, but on that network it would frequently lose data connectivity, despite the phone showing a strong signal. My wife's Galaxy S3, also on Three, would stay connected all the time. If I tried manually searching for networks and selecting either T-MO or AT&T, usually that would restore connectivity. However...
3) Entering manual network selection from this state (connected to T-MO but not getting any data), the phone would display a warning along the lines of "Do you want to search for networks while there is an active data connection?" -- yet there was no data connection icon in the status bar, and no throughput. This feels like some sort of bug - the phone thought it had a data connection but really didn't?
3) Even though I would manually select the AT&T network, and get some throughput, the phone would fairly soon spontaneously reconnect to T-MO, and shortly afterwards again lose data connectivity. This became tedious and frustrating. Other phones I've had have always respected a manual network selection and stuck to the selected network, even when if another available network had a stronger signal. Not so this G3. Is this known, normal behaviour?
The only other thing that may be relevant is that for most of the time I had the phone set to connect only to WCDMA networks, because the data capability of GSM is next to useless, and since I'd not seen any LTE, and WCDMA + LTE only is not an option, WCDMA was really all I was interested in.
After a phone restart, VoLTE/4G Calling and Wifi Calling work for a short period, then stops working, usually after moving around between mobile towers and/or wifi hotspots.
I find it happens whenever the device loses mobile signal, or when the device flips down to 3g and then back to 4g, 4g data service returns but both VoLTE calling and WiFi Calling remain disconnected despite being enabled in settings.
This happens on my primary SIM only. I have a second sim in my phone at the same time which works perfectly with both VoLTE and wifi calling. I upgraded from a Mi 9 phone which worked perfectly with both these SIM cards.
Looking at the device logs (With Logcat reader), I get lines like
QImsService] ImsServiceSub : [0] Permanent IWLAN reg failure (IKEv2 auth failure)
I also see
IKEV2ErrorReceiver] Canadian configure is not set, return
Other things I've tried:
Updating to the latest MIUI version (12.1.5.0)
Network settings reset
Only using the one sim
Removing the second SIM
Clearing all caches
Clearing caches and storage of things like CneApp, Carrier Services, Phone Services, Phone, anything carrier related
Resetting APNs, adding APNs with bearer set
Setting phone to prefer 4G/LTE (ie do not connect to 5G)
Removing my VPN, same problem with VPN installed or not installed.
Removing sim cards and leaving phone off for a while (an hour or so)
Getting a replacement SIM
I have not tried a factory reset yet, as I am not confident in being able to back up the phone fully and other threads with similar issues suggests that won't solve the problem.
One way I've managed to get it stable is to dial *#*#4636#*#*, go to phone and set preferred network type to "NR/LTE". The phone does not connect to 3G or below in this mode, and unfortunately this setting gets reset when the phone restarts.
At this point I think its a problem with the MIUI software version itself, or some firmware driver that comes with these versions of MIUI. I'm hoping MIUI 12.5 will fix it, but I'm wondering if anyone else has seen this issue or knows what else I can try.
Upgraded to 12.5.1.0(RJDEUXM) and the issue is still present, also tried asking my operator to completely reprovision the line with no luck.
I guess I'm stuck with this behaviour until I upgrade my phone
STEP #1) See if VOLTE works normal when switching towers with a different phone.
If it does then you can try the things below, if it doesnt maybe it might be the cellular carrier issue.
If other phones work find then please note that VoLTE mainly works on 4G LTE ... donest work on 2G or 3G and may or may not work on 5G depending on your carrier. Find out what NETWORK BAND your phone is using when VOLTE is working. You can use a app like
Network Cell Info LiteOnce you find out the band you can then use a script or use a app so it stays on that network BAND. A little more advance but it may also possibly be a DNS issue in the tables during the change of towers during the reprovisioning... you can try a script to flush the DNS and reload the tables when the network info changes or bind them statically for testing purposes.
Still doesnt work it may just be the firmware's modem issue with that phone in the way it handles re-provisioning process during cellular multiplex switching.
Good morning all.
My S9 is completely stock (Android 10) and I don't want to install any custom ROM.
Is there a way to force LTE only (Three network/UK)?
I have tried #*#*4636*#*# but this doesn't work. I have used a couple of apps that have given me access to the settings and changed it to LTE only and this is confirmed in the mobile settings page but the phone keeps reverting back to 4g (not 4g+).
I definitely have 4g+ here because it does connect if I reboot my phone and the download speed is double my normal rate but I cannot get it to stick.
Is there a specific APN I could use?
May I ask you for advice?
Thank you.
SSThing said:
Good morning all.
My S9 is completely stock (Android 10) and I don't want to install any custom ROM.
Is there a way to force LTE only (Three network/UK)?
I have tried #*#*4636*#*# but this doesn't work. I have used a couple of apps that have given me access to the settings and changed it to LTE only and this is confirmed in the mobile settings page but the phone keeps reverting back to 4g (not 4g+).
I definitely have 4g+ here because it does connect if I reboot my phone and the download speed is double my normal rate but I cannot get it to stick.
Is there a specific APN I could use?
May I ask you for advice?
Thank you.
Click to expand...
Click to collapse
You can try with Force LTE Only app on Play Store since Scamsung is kinda blocked the Radio edit part on ONEUI. But be aware that on some firm, Scamsung devices will not be able to make phone call or receive text msg when on force LTE only mode!
That's one of the apps I have used but the phone just reverts back to 4g (even though Network Mode now shows LTE only).
Looks like I have been misunderstanding my network terminologies.
What I am trying to do is force my phone to stay on the 4g+ signal, because I get much better downloads. It is definitely available here because I connect to it for a few minutes if I reboot my phone. My phone is completely static with good, no fluctuations, signal.
Can this be done?
My provider supports just 4G; is it better to leave the switch in setting on 5G or select 4G?
Thanks!
If your provider only supports 4G, your phone should not try to connect to a 5G network, ergo it doesn't matter. Just leave the switch on automatic ("recommended") and your phone should only (try to) connect to 4G.
I'm saying should, since many people here in this forum have problems with mobile network standby and connectivity, so we might have a couple software bugs present in the firmware. So it might be a wise idea to force 4G.