Database Info

Please help! No 3G or GSM, can't call, but LTE works fine.

I really need help with my device, I searched all over XDA and no-one seems to have the same issue as me.
Here is some information:
1) Nexus 6P (H1511)
2) 6.0.1 Absolute stock, no rom, no root, no custom recovery. Build number MMB29P.
Recently got a new Nexus 6P and imported to Russia. All of the major bands here are supported. And the phone worked excellent for a few weeks, but then it lost all 3G or GSM connectivity. Just randomly,didn't do anything with it, the only thing I did is move to another city but than I got back, the issue didn't resolve. LTE works perfectly but can't call or receive calls, can receive sms though. Reseting network settings and factory reset changed nothing. Tried manualy set network to WCDMA or GSM with *#*#4636#*#* command, the moment I switch to anything besides LTE the connection is lost. Contacted the provider, no problem on their side, my SIM works good in other phones, my phone with other SIMs - no.
I don't think it is a hardware issue because a few times I managed to get everything working after an hour of switching networks and bands with no particular order in the *#*#4636#*#* testing mode.
After a while I figured that if I set phone to "GSM only" on USA bands in testing mode, but at the same time set it to "LTE prefered" in the normal network settings menu. I am able to set phone to Band mode 7 and set the network back to 2G in network settings keeping it on " GSM only" the whole time and only after this compicated algorithm and after a reboot 2G and 3G starts working. But any reboot after that revertes everything back to only LTE stage. Also if I get everything working but than reset network settings everything stops working again.
I have no idea what caused such an issue, I really hope someone can help.
Sorry couldn't post screenshots because of the "10 posts rule".

My network no longer appears when I search in network operators

My problem is a bit weird. I've been using Wind Mobile in Canada for quite a while, and I've never had a problem with it. I went to India for a month (left my Wind Mobile SIM at home), and when I came back, my phone would connect to Wind Mobile for a few days, and then disconnect for a few days. And when I tried to reconnect to it, it would say cannot connect to network right now, try again later. No other users in my area had this issue. I carried out the following"
I went into TWRP>advanced wipe>checked off everything and wiped everything (USB-OTG failed, but I don't think there is anything to wipe there).
Flashed stock CM12.1 as per this guide http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541 - Except I did not carry reset the tamper/lock the bootloader
Still could not connect to Wind Mobile. It would sometimes let me connect to "Wind Away", and other networks, just not "Wind Home," which is the one I'm supposed to be on.
Flashed TWRP because I forgot to do so earlier. Not sure if relevant. Still could not connect to Wind Mobile. It still let me connect to Wind Away, and other networks sometimes.
Plugged my SIM into my friend's OPO, and it worked!! Plugged his into mine, and it did not work
Fiddled around in the "phone info" menu that comes up after dialing *#*#4636#*#*
Now I can't even see Wind Home or Wind Away when I search in Network Operators. But it still lets me connect to Telus and Rogers. I even received text messages after connecting.. So I'm guessing I ****ed something up in the *#*#4636#*#* menu that prevents me from finding Wind network under network operators.
My Current Build:
CM 12.1.1-YOG7DAS2K1
Kernel 3.4.67-cyanogenmod-g022-ae3
Build LMY48Y
Baseband Version: DI.3.0.c6-00241-M8974AAAAANAZM-1
Thanks for your time

No 4G / LTE in Austria?

I'm customer of the local carrier "Drei" (Hutchison) but my Pixel (bought in Germany) does not connect to the 4G / LTE network.
The support of Drei is not able to help me. LTE is working fine with the same SIM on the OnePlus One.
Any clue how to fix that?

There is regional problem I came across. In India here we dont have VOLTE support on pixel

FallinHigh said:
I'm customer of the local carrier "Drei" (Hutchison) but my Pixel (bought in Germany) does not connect to the 4G / LTE network.
The support of Drei is not able to help me. LTE is working fine with the same SIM on the OnePlus One.
Any clue how to fix that?
Click to expand...
Click to collapse
What LTE bands do they use on Drei?

Same happen to me in Portugal with MEO. I can't seem to solve it. Talked with my carrier support, they don't know why I don't have 4G/LTE.
I never got 4G, but my SIMCard has no issues with iPhone getting 4G right away.
Is it Pixel issue? I start to think it is..

3/Drei is listed here: https://en.wikipedia.org/wiki/List_of_LTE_networks_in_Europe#Commercial_deployments
The specs of the Pixel are listed here: https://madeby.google.com/phone/specs/
That is all information I have got.
Is there any possibility to display information about nearby LTE senders via an app?

After activating "LTE only" via *#*#4636#*#* it works. Everytime I search for networks or reboot my phone it still connects via 3G and switches back to "LTE UMTS auto (PRL)".
Seems to be a software issue.

FallinHigh said:
After activating "LTE only" via *#*#4636#*#* it works. Everytime I search for networks or reboot my phone it still connects via 3G and switches back to "LTE UMTS auto (PRL)".
Seems to be a software issue.
Click to expand...
Click to collapse
I use the phone on Verizon and don't have any problems connecting to LTE using any available mode (Global, LTE/CDMA or LTE/GSM/UMTS). However, if I set the mode to LTE-only via the menu, it will also reset when I either reboot the phone or if I just open the "Cellular networks" menu. I think it's how it supposed to work because that menu doesn't have the LTE-only option, so it resets the mode to whatever you see there. The solution is simple - if you reboot the phone change the mode again and don't go to the "Cellular networks" menu
Regarding why it doesn't work with "LTE UMTS auto (PRL)", it might be because Drei didn't configure a handover from UMTS to LTE on the cell site you're connected to. It looks like Pixel finds UMTS signal first, but doesn't know that LTE signal exists due to a missing handover. Another phone might be fine if it searches for LTE signal first. But if you can see another phone switching from UMTS to LTE in the same spot, my theory is wrong.

Lg g4 h810 works 2G only

Hi,
I bought this phone Lg G4 h810, it shows AT&T logo whenever i boot it and the problem is despite of network mode on lte/wcdma/gsm/auto it always runs on2G internet speed and shows E sign.
I am from india and many service providers are still not offering4G internet service. But this phone doesn't even runs on wcdma. My previous phone lenovo was nicely running on wcdma and always showed the sign H.
My cellular operator is idea cellular and i had a word with them, they sent me settings and all and help me input the settings manually too, but nothing worked.
I checked even the frequencies, idea cellular is offering UMTS B1(2100) and UMTS B8(900 gsm). I checked this on LG website and these bands are compatible with the phone i bought, but still i can't get anything more than2G. Why so?
Plus there is one more problem, when i switched it on for the first time it showed update available And when i tried to update, it showed error and now always there's an icon on top left corner of phone saying couldn't install system update. I tried restarting and updating the device many times, but it's still the same.
Any help is much appreciated.
Thanks in advance.

Have you put your Company APN?

Yes i did, the company executive even helped me to manually save the settings to run the internet in a 3G mode. But all efforts in vain.

Did you solve the issue?

Anything new? I have the same problem.

I have this problem too

Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.

scytalemk said:
Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.
Click to expand...
Click to collapse
Hi
Under VoLTE there is another entry named "Session" and in there
RPR(on/off) switch
I enabled it and restarts but it is again on 2g
Anyone further on this issue??

I have this problem too
I was flash the stock firmware,custom firmware customizing the build.prop,changed the settings in the engineering menu *#546368#*810# disconnected volte,changed LTE bands forcibly. Nothing helps,dont work 3G LTE - 2G only(. I realized that I need to re-flash (change) the original QCN file for H810 and re-register IMEI , but I can not find QCN it freely available.

Hello there, i had the same issue. The fix that worked for me was searching for network manuallly and reconnecting again to my carriers LTE network. Worked as a charm. The issue maybe was a brutal handover as I had been travelli g from a city to another one 200 km away. So somehow I had been disconnected from the LTE network and left stranded in the 2g one. Try it it should work

Can't connect to LTE

About a month or so ago, I went on vacation to Asia with my S7. I had it on airplane mode pretty much the whole trip but turned wifi on when available.
Since coming back, my S7 stopped being able to get on to the LTE network. It stays at 4G, which is HSPA speeds on my network. There is discussion about 4G and LTE being the same, but I'm experiencing much slower speeds...5-6Mbps compared to 25-30 when my phone showed LTE.
It's definitely my phone as I put my SIM in another S7 of the same network, and that phone went to LTE. Their SIM in my phone stayed at 4G.
I've tried various APN settings, made sure GSM/HSPA/LTE was selected, reset the network settings, tried some apps that said it would force LTE...but nothing is working.
When the app does force LTE it says I am in Roaming mode. I checked the CSC and it does show my correct network carrier code.
What can I do here?

Have you manually selected and registered with your carrier's network from the network settings?
Settings > Connections > Mobile Networks > Network Operators > Search Networks
Cleared cache from recovery?
Called your carrier?
Factory reset the phone