[Q] Carbon rom only 3g? - Nexus 4 Q&A, Help & Troubleshooting

This is an issue I've always had with this rom. As soon as I flash, I lose my good hspa plus signal and either get bad signal or 3g. I've flashed other roms, and this is not a problem. Normally I use pacman, but due to stability issues with the latest nightlies, I turned to carbon again. If I could maintain hspa+, then I would be a happy camper. I have tmobile, are there any setting that could help, or do I just need to flash the rom again?

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LTE on CM roms.

The weirdest thing happens when I flash CM 12 roms. I lose LTE. I have flashed Tamesek's build by Maddog. I also have flashed the Cm 12.1 unofficial rom and Mokee rom. All of these do the same thing. I have checked the APN,'s clicked on LTE, and done what I know to activate LTE but to no avail. Is this a CM bug right now? Are there any others going through this? As of now, only O2 rom keeps LTE working. This is driving me nuts because I would like to run other roms, not O2. Any thoughts on this?

CM 13 Nightlys G900F - 4G/LTE signal

I'm having problem with 4g signal after flashing CM 13, i did a full clean install.
I didn't have any problem on CM 12. I tried flashing newer modem, but it didn't help much.
When 4G signal drops, it doesn't change to 3g, it stays on with no signal. And i have to manual change to 3G.
I haven't seen other people that are having problem with 4g on CM13.
Maybe i have to try other modems.

4G/LTE not working on cm 13 based roms

Hello, I've tried a lot of cyanogenmod 13 based roms, even cyanogenmod itself, and 4G never worked on any of them.. I'm on g900f, tried changing apn and it didn't work anyway, any help?
No one knows anything? I've tried AOSP roms, and they don't have LTE working for me either..
Make a clean installation of the latest CM13 SNAPSHOT, I used to have the same issue on the late nightlies but the Snapshot fixed it.
I tried that, but as soon as I flashed a custom kernel it stopped working.. Any ideas why?
I'm on latest 6.0.1 original samsung rom update, and lte/4g option is gone, there is just 2g and 3g options... Also gps is buggy when you turn it on, it automatically sets to high accuracy for spying...
I had to return to stock because lte only works during the initial configuration on AOSP Roms.. That's strange. On stock 4G is perfect..

LTE doesn't work on any cyan/aosp-based ROMs

My device is D820. On stock everything was fine, LTE has worked all over the city. But LTE does not work on any cyan/aosp-based ROMs. I chose different network modes, including LTE-priority, does not work, the connection is completely lost. In addition, the network has become much more likely to disappear.
ROMs I flashed: CM13, ResurrectionRemix last build, Paranoid Android 6.0.3.

Constant Signal Loss on 7.1.1 Roms after updating

Hey guys, so I was on Oxygen OS 3.5.8 before updating and installed 7.1.2 roms (clean install) and both Sim cards have been losing connectivity over and over. Ive tried flashing the modem to 3.5.6 and even 3.1.0 and then doing another clean install but the issue remains. Ive tried multiple 7.1.2 roms and its the same thing, there was no issue before installing the roms. Any help would be appreciated
i am having the same problem, now i have to go back to stock rom.
I hear network drop issue is caused by Google contacts. If true, you could use the AOSP version. You might have to reflash the rom with pico Gapps.
Murbert said:
I hear network drop issue is caused by Google contacts. If true, you could use the AOSP version. You might have to reflash the rom with pico Gapps.
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Really? Ive never heard of that lol. Thanks Ill try that and update it here
Wow so that did the trick, Installed halogenOS with full gapss (not stock) and no signal drops
But now I only get edge connection for data, no LTE. Any idea how to fix that now?
EDIT: Updated to OOS 3.5.6 firmware and that did the trick! All good now. Thanks Murbert
Some updates
After go back to stock oos 3.5.8, no signal loss but not LTE also, only 3g or H+
Then I reinstall 7.1.2 ROM with gapps nano , so far no problem (never install Google contact)
Another update...
So Sim connection has been good but now wifi connection drops for like 10 seconds every now and then, very annoying.
Any idea on what this might be now?

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