CM13 - Signal loss in LTE - Oppo Find 7 and 7a

Hello,
I have an Oppo Find 7a with CM13. In my home i have 50/75% signal and it goes down to 25% or even 0 during calls. Also, people said they got "busy" when they called me, although I wasn't speaking with anyone at that time. On the streets I usually have signal but during calls it goes down to 50%, causing distortions.
This signal problem appeared 1 week ago, when i upgraded from CM12.
The problem is only in LTE/GSM auto (PRL) (default) mode. In GSM only it works perfectly, but the internet is 3G. Also on each phone restart it gets back to LTE/GSM auto (PRL)
I already changed a few CM13 versions and did clean install, reinstall TWRP and SuperSU.
Please help me fix it. If possible, give me some details or send me to specific guides.
Here are the phone details:
TWRP version: 2.8.4.0
SuperSU: 2.65-20151226141550
Androidversion: 6.0.1
cm-13.0-20160304-NIGHTLY now, I have tried 0302 and 0228 as well.
CyanogenMod API level: Elderberry (5)
Baseband version: .4.0.1.c7-00004-M8974AAAAANAZM-1
Kernel version: 3.4.110-cyanogenmod-g229aab7
Build number: cm_find7-userdebug 6.0.1 MMB29U 8fa5a5536e test-keys
The operator, Vodafone, has only 3G voice services; LTE is for internet only.
Signal strenght right now:
GSM only: -79 dBm 17 asu
LTE/GSM auto (PRL): -109 dBm 31 asu

nothing?

rhade87 said:
nothing?
Click to expand...
Click to collapse
This device fourm is fully inactive bro . Your issues fixed now?

Related

[Quickfix] 5.0 No signal/wifi bug

I might have stumbled upon a more stable fix for the no signal bug in the 5.0 roms
(Currently its solved by turning the wifi on and waiting and turning it off again to get signal)
To fix:
Go to Settings -> Mobile Networks -> Change Preferred network type to LTE
Go To choose Network operators then [Search Automatically]
I tried it on sultans CM 12.0 seems to be working for me

Android marshmallows in ROM does not change my Internet connection speed

My network connection speed never change only h or only edge Pls help me :crying: :crying:
+++ I also have no LTE, 30B (Bump), different modem (hybrid or 21A). what to do ?
if you flashed the kdz you should be fine
For me, I have to wait for the next build... The first build is not always the best build... 21A modem makes at least the signal working...

Paranoid Android Build Version: 6.0.2 + 6.0.3 - Nexus 5 no mobile data

Hey guys,
I love the new rom and it is doing fine with Build Version: 6.0.1
However, if I flash a version above 6.0.1 my mobile data stops working - even though it is turned on in the settings. I can call on my phone but mobile network doesn't work anymore. There is no LTE/4G/H/E symbol above the signal indicator.
I already tried flashing a new radio (M8974A-2.0.50.2.28 - downgrade from 2.29) but there was no change. I own a Nexus 5 (2013), no special kernel installed.
Any suggestions?
Kind regards
JulesWinnfield said:
Hey guys,
I love the new rom and it is doing fine with Build Version: 6.0.1
However, if I flash a version above 6.0.1 my mobile data stops working - even though it is turned on in the settings. I can call on my phone but mobile network doesn't work anymore. There is no LTE/4G/H/E symbol above the signal indicator.
I already tried flashing a new radio (M8974A-2.0.50.2.28 - downgrade from 2.29) but there was no change. I own a Nexus 5 (2013), no special kernel installed.
Any suggestions?
Kind regards
Click to expand...
Click to collapse
Why not upgrade to 6.0.3 and lose the Xposed to test?
Pirateghost said:
Why not upgrade to 6.0.3 and lose the Xposed to test?
Click to expand...
Click to collapse
Yesterday I've tried a clean install of 6.0.3 with a previous full wipe and the same problem occurred. No xposed framework was installed, nor gapps. Wifi worked. I could make calls but no mobile data.
Might it be a carrier or Sim card problem (I've got a sim from Germany Drillisch - O2)?
I tried another SIM card from my work phone in my Nexus 5 (also O2 Network carrier) after flashing 6.0.3 and mobile data works. If I switch back to my regular Sim card, mobile data stops working again.
This is beyond my understanding. Is there a possible solution so my regular Sim card will work aswell?
Kind regards
Set your APN to match your carrier.
I
Pirateghost said:
Set your APN to match your carrier.
Click to expand...
Click to collapse
It worked! Man, huge thank you. You're awesome!!! :good:

OP3 Mobile Data on Custom ROM/Kernel

Disclaimer:
I did my research before posting here, tried I believe every suggestion and "fix", so please don't throw links at me with the ones I already tried.
Thank you.
The Issue:
I DON'T get LTE after manually disconnecting or leaving Wi-Fi area (Sometimes it works, so the APN settings are correct; to regain connection I need to toggle Airplane mode or Reboot) on Custom ROMs and Kernels. This includes: Stock Beta16 + ElementalX/Franko kernels; ExperienceOS + Stock/ElementaX/bluespark kernels; FreedomOS + Stock/ElementaX/bluespark kernels.
It DOES WORK on Stock Beta16 and Beta17 just fine.
I use the same APN setting in all cases, which included VoLTE on; APN protocol and APN roaming protocol IPv4/IPv6; Aggressive Wi-Fi to Cellular handover; Cellular data always active. (Some of them are the suggestions and "fixes" I found on the Interwebs)
Any ideas how Stock-based custom Roms and kernels can brake my LTE connection? The carrier is EE UK. SIM also works fine on my Nexus 6P running Vanilla OS with Flash kernel and Root.

network Problem

Hello guys,
Today my mi mix 2 arrived. I have some Problems with my network. I can't call and write SMS. I connected to my Provider but IT doesnt work. Have somebody a solution?
Thanks
Have you tried a different SIM card slot?
Did you check the apn settings for data and the service center number for sms? If these are not being read from your SIM card you have to enter them manually.
Change your preferred connection to 3G from LTE should fix the problem. I'm guessing you're on the China ROM. China ROM has issue (maybe bug) with LTE B7 not being properly supported. Flashing Global ROM could or probably will fix the issue.
Hakim Farouk said:
Change your preferred connection to 3G from LTE should fix the problem. I'm guessing you're on the China ROM. China ROM has issue (maybe bug) with LTE B7 not being properly supported. Flashing Global ROM could or probably will fix the issue.
Click to expand...
Click to collapse
Thanks it works.
Yes i am on china rom. I will flash the Global rom in the next time. Do you have a link?
Explains why my lte sucks. Waiting the 3 days still for the bootloader unlock.
Targosch said:
Thanks it works.
Yes i am on china rom. I will flash the Global rom in the next time. Do you have a link?
Click to expand...
Click to collapse
MIUI 8 Global Stable: http://en.miui.com/thread-932832-1-1.html
MIUI 9 Beta: http://en.miui.com/thread-1026126-1-1.html
You need to use MIUI 9. MIUI 8 has an issue connecting to WCDMA networks on this phone. It's ridiculous, but upgrading to MIUI 9 solves it.
duraaraa said:
You need to use MIUI 9. MIUI 8 has an issue connecting to WCDMA networks on this phone. It's ridiculous, but upgrading to MIUI 9 solves it.
Click to expand...
Click to collapse
I solved the problem. I dial *#*#4636#*#* then I went to phone Information and preferred a another network. The standard is lte/td-scdm/WCDMA and I need for Germany LTE/td-scdm/GSM.
In a city it could work with the standard one. But I am living in a village. We don't have lte just GSM
Targosch said:
I solved the problem. I dial *#*#4636#*#* then I went to phone Information and preferred a another network. The standard is lte/td-scdm/WCDMA and I need for Germany LTE/td-scdm/GSM.
In a city it could work with the standard one. But I am living in a village. We don't have lte just GSM
Click to expand...
Click to collapse
But that dial method won't stick though. You will have to do that everytime you reboot your phone. but since you don't have LTE in the countryside, I guess the 3G preferred method in the settings will do for now. You still have to go to the Global ROM to get the LTE bands fully working.
Hakim Farouk said:
But that dial method won't stick though. You will have to do that everytime you reboot your phone. but since you don't have LTE in the countryside, I guess the 3G preferred method in the settings will do for now. You still have to go to the Global ROM to get the LTE bands fully working.
Click to expand...
Click to collapse
I can't just prefer 3G cause I am most of the day in the city
Upgrading to MIUI 9 Global doesn't help. Issue stays. And indeed after every reboot or even flight mode, you must readjust manually.... Terrible issue.

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