[Q] CM 12 connectivity issues on Verizon 3G - Nexus 6 Q&A, Help & Troubleshooting

I have the N6 running the latest CM12 and everything works great on Verizon as long as I am in a 4G LTE area. As soon as I leave 4G area I get a data roaming message and exclamation mark on my Verizon signal status bar. I have confirmed that stock rom will switch from 4G to 3G no problem but CM 12. I have looked into confirming APN settings but for some reason there is no 'APN settings' under the mobile networks settings fir me to confirm. I am just wondering if this is a common issue with CM 12 or just me. I was unable to find a thread on this so forgive me if this is a duplicate. Thanks.

I had the same issue with Liquidsmooth ROM. LTE works great 3G didn't work even when I enabled data roaming. I also couldn't send/receive mms while on 3G. Had to go back to stock rooted until the devs get this figured out.

Related

4G LTE on T-mobile rooted unlocked MB886

Just an info for people having problems with T-mobile 4G --> 4G LTE new roll-out.
The APN settings needs to be updated to: fast.t-mobile.com
I have wasted a better part of this morning to figure this out after the "upgrade" here in Houston...
FIX for no data on Atrix HD on T-Mobile
I want to add what I also found out, after 3 days without data:
Device:
Atrix HD (MB886), factory unlocked, Original ATT Motorola ROM, JB 4.2.1, rooted (by the Ubuntu method). I have the device for a month and it works perfectly on T-Mobile.
Area:
Washington DC/Maryland area
Symptom:
Until 2 days ago 4g worked everywhere, great speed, faster than my Samsung Blaze.
Two days ago, in some areas I still had perfect data (4g). Other areas (changing cell towers), data connection disappeared. Phone and SMS worked normally but no data at all (no 2g, 3g, 4g, nothing!). 4g kept trying to connect from time to time if I forced it; data would work for a few seconds and than stopped. So, some areas the data worked perfectly, other areas there was no data at all.
Solution:
I found 2 solutions:
1- The right one, change the APN as posted above.
2- Download LTE Settings (Ryo Ueashima) from Play store; go to “Set Preferred Network type” change to GSM/CDMA auto (PRL). This fixed the problem without changing the APN.
I hope this info gets out fast over the internet so everyone can understand what happened with T-mobile changes to LTE, and fix it. I was about to get read of the Atrix HD…
Confirm, it'll work on old forced 4G settings, I have tried that too. Just make sure you get "4G LTE" icon, not just 4G as a result...
Sent from my HTC_Amaze_4G using xda app-developers app
no 4g issues
I have an unlocked AHD on T-mobile, and have no issue getting 4g hspa+:15 granted there is no such thing as LTE in my area
mamar said:
I want to add what I also found out, after 3 days without data:
Device:
Atrix HD (MB886), factory unlocked, Original ATT Motorola ROM, JB 4.2.1, rooted (by the Ubuntu method). I have the device for a month and it works perfectly on T-Mobile.
Area:
Washington DC/Maryland area
Symptom:
Until 2 days ago 4g worked everywhere, great speed, faster than my Samsung Blaze.
Two days ago, in some areas I still had perfect data (4g). Other areas (changing cell towers), data connection disappeared. Phone and SMS worked normally but no data at all (no 2g, 3g, 4g, nothing!). 4g kept trying to connect from time to time if I forced it; data would work for a few seconds and than stopped. So, some areas the data worked perfectly, other areas there was no data at all.
Solution:
I found 2 solutions:
1- The right one, change the APN as posted above.
2- Download LTE Settings (Ryo Ueashima) from Play store; go to “Set Preferred Network type” change to GSM/CDMA auto (PRL). This fixed the problem without changing the APN.
I hope this info gets out fast over the internet so everyone can understand what happened with T-mobile changes to LTE, and fix it. I was about to get read of the Atrix HD…
Click to expand...
Click to collapse
Cool thanks for the heads up on the app. It opens what you normally could dialing *#*#4636#*#* on most other phones..

[Q] 4G or LTE with Straight Talk AT&T?

After weeks of playing around with build.props, APNs, and patches, on custom ROMs and stock, I am still attempting to get faster and more consistent data.
4G and LTE are supposed to be possible, but I can't figure it out.
I can get around 5 Mbps down using WCDMA only, but the very next moment in the same spot could be something entirely different.
My mobile data goes out quite often where it is just the outline of a triangle. I have never seen any other letters besides an E and a H.
I am currently on stable CM 10.2.1 installed on a newly created and wiped SS Slot 1, and have been for about a week and a half.
I used default network = 0 in build.prop this time around.
I finally managed to get my phone to recognize my SIM card while using the following configuration:
default network in Phone Testing = LTE/GSM/CDMA auto (PRL) and
preferred network mode in Mobile Network Settings = Global (CDMA/EVDO/LTE/GSM/WCDMA).
It acted really strange at first but the settings stayed even after a handful of reboots.
I am using Straight Talk's current APN settings (tfdata).
My dBm is constantly going from about -90 something to -108 and my asu ranges from around 3 to 14.
Before I just now rebooted, and every so often, it shows 2147483647 dBm and 255 asu; I have only just noticed this in the past few days, however. It is now back to -101 dBm and 6 asu after restarting.
I have attached screenshots of it doing that and a shot of "normalcy", as well as my last few speed tests.
Can anyone tell me what I might be doing wrong?
Should I try default network = 10 again in build.prop?
Or could anyone provide a copy of a build.prop working on all possible network modes (with the ability to edit APNs)?
Thanks in advance. I will take any and all advice or opinions.
I am so over trying to figure this out! When I really need my mobile data, it doesn't work!
I have attached a couple of graphs of my signal highs/lows etc. These results are from the Real Signal app.
I don't really know what they mean, but I am hoping they might shed some light on my issue and I'll get an answer from someone.
Sent from my XT875 using xda app-developers app
How are you getting it to get edge data? On mine I either have HSPA or nothing. Is there a way to make it default automatically to edge when the HSPA signal gets weak. I tried using liquid smooth 4.2.2 and changed it to 2g only and never could get signal. Change it to auto and get HSPA again
Sent from my Nexus S using xda app-developers app
should i take the bionic out office space style?
twfs said:
How are you getting it to get edge data? On mine I either have HSPA or nothing. Is there a way to make it default automatically to edge when the HSPA signal gets weak. I tried using liquid smooth 4.2.2 and changed it to 2g only and never could get signal. Change it to auto and get HSPA again
Click to expand...
Click to collapse
Not really sure how, and when it is on Edge, data hardly works anyway, so I probably can't help you there.
But I do have default network = 10. Only other thing I changed was telephony.lteOnCdmaDevice=0 to get the APN menu under mobile networks.
However, at the moment (and the majority of moments), with Wi-fi off, I have no data, -109 dBm, 5 asu, GPRS service is disconnected, and my phone number is "unknown", so I am definitely not in the position for giving suggestions.
Am going to try CM 11 again today, but I was hoping for some answers before doing anything other than installing..
I will ask more specific questions in the hopes that someone, anyone, can provide some sort of idea for at least 1 of them..
Is it even possible for the Bionic to have consistent, non-frustrating access to 2G, 3G, 4G, and LTE when unlocked for the AT&T or T-Mobile networks using Straight Talk?
Is there a way to enable the APN menu without changing the build.prop?
Does anyone have a targa build.prop (entire thing or line changes) of phone that has reliable data, etc. working on 2G, 3G, 4G, and LTE?
Could it be an issue with the SIM card itself?
Am I even approaching this from the right angle?
Should I just give up and get a new phone?
Thanks in advance.
Patch Idea
I am a novice at best and that may be a stretch.
BUT. Both of my Bionics are running on Straight Talk AT&T 4G sim cards.
One is a hardware REV-B the other is hardware REV-C.
The REV-C is rooted and running on the Jelly Bean stock rom.
The REV-B is rooted and running on a MoKee MK4.4 KitKat Release that I downloaded
from their site and opened in "Safestrap".
I do not think that I have achieved 4G yet however,
I do have fairly stable signal and data since
I installed a CDMA to GSM patch that I found searching these forums.
It includes Straight Talk and AT&T APN!
I am not aloud to post links yet. But if you search for these things here you will probably find them fairly quickly.
I would love to know if you can achieve 4G!
Good Luck!
Netzerite

[Q] No Mobile Data on Verizon Moto X with AT&T sim.

So I have a Stock Verizon Moto X 2013 with an AT&T sim. SMS, MMS, and Voice all work. The only thing that doesn't is the Mobile Data. I have tried to manually change to APNs, turning off radios and network refreshing. When I am not on Wifi, the celluar signal looks fine, containing white bars. However, as soon as I go off WIFI connection, the celluar signal immediatly turns orange in the Quick Notifications toggle. Please. I don't even want LTE, just some 3G would be nice. How can I fix this?
I'm also running a Verizon phone on AT&T, and 3G data does work. I'm not sure I can trouble shoot your specific problem, but I can tell you what worked for me.
I ditched the stock ROM, and installed Krypton 1.4 ROM. Then I installed Xposed and the GravityBox module.
This gives you access to the custom mobile network settings, "preferred network type", "select network", and "network mode" (see pics).
Using these settings, I get HSPA connectivity.
Sent from my XT1060 using XDA app

CM 12.1 No LTE Only 3g

On CM 12.1 in Moto X XT1053 that came from stock 5.1. I have download twrp-2.8.7.0-ghost.img, cm-12.1-20151003-NIGHTLY-ghost.zip, and gapps-lp-20141109-signed. I cant seem to get any LTE signal, I only get data when turning lte off and switching to 3g. My network carrier is METROPCS. Thanks in advance.
Found a Fix
So last night i fix it on CM 12.1 buy removing all other APN settings that didn't belong to my network in my case just Metro PCS. After doing so my LTE signal shows and I am getting perfect signal.

Cell signal keeps reverting to 3G

Hi,
So I'm having an issue keeping an LTE signal. I use straight talk with at&t and I can get LTE if I turn the radio on/off, but it will always switch itself over to 3G at some point in the same location. There are apps that can force it to do LTE only which works, but I can't make or receive voice calls over LTE.
Does anyone know how to fix this? This never happened on other phones on the same network. In my specific location I get 2-3 bars of LTE and 4 bars if switched to 3G. I guess it wants to keep using the better signal.
Also at home where I have full signal LTE and H+, it will choose H+ over LTE.
Had same problem. Switched sim slot to the other. 4g again. Try IT?
Did you try different APN settings? I'm guessing you already checked the preferred network option.
Sent from my MIX using Tapatalk
APN settings are good and I can get LTE if I flip the radio on and off...it just always wants to revert back to 3G at some point. Same thing happens in sim card slot 1 or 2
pacattack81 said:
Hi,
So I'm having an issue keeping an LTE signal. I use straight talk with at&t and I can get LTE if I turn the radio on/off, but it will always switch itself over to 3G at some point in the same location. There are apps that can force it to do LTE only which works, but I can't make or receive voice calls over LTE.
Does anyone know how to fix this? This never happened on other phones on the same network. In my specific location I get 2-3 bars of LTE and 4 bars if switched to 3G. I guess it wants to keep using the better signal.
Click to expand...
Click to collapse
Which rom are you on? I remember there's a specific rom that has a bad modem file. Trying updating to the latest version.
Maybe you can solve it by going to APN settings and set APN protocol -> IPv4 and APN roaming protocol -> IPv4 . That worked for me. I had the same issue.
Or try IPv4/IPv6. That's network related and maybe IPv4/IPv6 is correct for you.
I have to set it every time I flash EU or EPIC rom.
Good luck.
did you ever figure this out?
I'm having a similar problem on a Note 4 Global. Only it switches to 3G for a voice call and never switches back.
dennygreen said:
did you ever figure this out?
I'm having a similar problem on a Note 4 Global. Only it switches to 3G for a voice call and never switches back.
Click to expand...
Click to collapse
Firmware update?
james1089 said:
Firmware update?
Click to expand...
Click to collapse
I've updated it, and it's all the same. Once in a great while it will switch over to LTE on its own, but 99% of the time it will just sit on H+ forever even though I know the LTE is fine wherever I go.
I guess this is just how it's going to be.
I finally fixed this by wiping everything in twrp and flashing a newer version of the global stable rom. LTE works fine now, and it doesn't stick on H+ when I make a call anymore.
dennygreen said:
I finally fixed this by wiping everything in twrp and flashing a newer version of the global stable rom. LTE works fine now, and it doesn't stick on H+ when I make a call anymore.
Click to expand...
Click to collapse
That's interesting. I guess Xiaomi fixed the bug in one of the releases. I wonder why you had to wipe everything though. What if we try to flash the latest modem. Is there a link to that? Would that work?
Would modem be the same as firmware? There's a thread on here that has those. None of them did anything for me.
My LTE problem is isn't fixed after all I guess. Once it loses LTE, it still never reconnects to it on its own and goes to H/H+ forever.
I guess the only thing that I've fixed is that it actually switches back to LTE after a phone call.

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