Develop Bugs

[Q] Reception is weird whenever I flash a ROM

Whenever I flash a ROM to my phone it won't get any LTE signal, or any internet signal for that matter. I flashed CM11 and now Paranoid Android but the same thing happens. I can send/receive messages and calls without a problem.
Wi-Fi works fine also

So it's just data that's messed up. Did you check your apn settings are right?

KJ said:
So it's just data that's messed up. Did you check your apn settings are right?
Click to expand...
Click to collapse
Thanks man, I feel like a freshman lol
That fixed it, I thought I would have to flash radios or something:good:

[GUIDE] [HOW TO] Fix VS986 dropping down to 3G/H+ from 4G LTE

I've been working on a fix since a long time now. If you are in SD community then you prolly know me. Anyway I was able to fix this on two of my phones and it's working fine. I tested for 12 hours now. I'll also tell you in the end what problems I'm seeing. I'm also working on a fix for that.
I noticed that a service is started when the fallback happens but if I kill that service the network also dies. But if you follow the below method it safely starts a new service which kills the one that's responsible for killing the 4G/LTE
1. Upgrade your phone to 13B firmware
2. Root 13B
3. Now download Shortcut Master lite app from play store.
4. Now add these shortcuts to your favorites in the "Shortcut Master lite app". You can search for "LTE" and click on search button
LTEBandSelection
LTETestMain
LTE System Selection
CDMAPreference
5. Now click on "LTEBandSelection" and enable all the bands
6. Save and reboot
7. You now need to enable your data and turn off your wifi. Make sure your phone is in Global mode (in settings >> Mobile networks >> System select)
8. After your phone is rebooted open "Shortcut Master lite" app.
9. Now tap on LTETestMain
10. Select Click on CDMA preference.
Now choose Band preference and select "any"
P_REV_Preference ---> "MOB_P_REV 3
This is important.. EVDO Revision --> Rev A
11. "LTE Connect w/o IMS PDN" must be checked
12. Now go back to your main menu in shortcut master lit app
13. This step is very important. Changing the timeout is important. Tap on LTE System Selection
Except "Scan duration" add a couple zeros to all the other timers. For eg: T_mpsr timer (Min) is 200
The fallback timer will reset itself after reboot. But don't worry the configuration is already updated with the new value. For some reasons the shortcut master lite app is not picking it up.
14. Now finally click on "CDMA preference" in the main menu and make sure it has the value you set in Step 10
At step 10 or 13 your network should go away and your phone should complain about "no network". That's fine. just ignore the message.
Now finally reboot your phone. That's it. You should now have 4G LTE and it won't fallback to 3G or H+
The only problem is when I'm on a call my 4G LTE is dropped to 3G/H+. But after I hang up it goes back to 4G LTE after 12 seconds. I don't know if it's an expected behavior. But I'm trying to see if there is a fix for that.
I tested this with Tmobile. Make sure your APN settings are correct.

Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.

konradsa said:
Not working for me on Cricket (AT&T). Still will always go back to H+, 4G LTE only works when I select CDMA.
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Click to collapse
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.

motorhead_biker said:
I tried it on my two phones (Both tmobile). My friend just tried it on his phone. It worked for him too.
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Click to collapse
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.

konradsa said:
That's great! I hope we can figure out also what we need to do to get it to work for AT&T, I am sure it's probably just some small tweaks required.
Click to expand...
Click to collapse
I will try it with my roomies att sim tonight. He has a nano sim, I need to find a sim adapter.

Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.

pwtzz said:
Awesome, thank you! worked for me T-mobile.
it initially didn't work but I had to turn data off then on.
It also cycles me to 2g speed for a few seconds sometimes but that may be due to poor signal in building.
Click to expand...
Click to collapse
Yeah It's due to the poor signal. I got that too. You can check your signal strength using LTE discover app.
But overall it's working fine for Tmobile. I'm gonna try and fix ATT tonight.

Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.

eigen said:
Is 13B the main thing in the solution? I've changed these settings before on 11A and wasn't fixed. I tried these numbers on 11A and still don't work.
Also, unless a phone supports VOLTE, it'll fall back to 3G/H for calls.
Click to expand...
Click to collapse
I tried in 11A and it didn't work for me. So I guess it needs 13B.

So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.

konradsa said:
So I tried various combinations last night for AT&T/Cricket, but I was not able to get it to work. No matter what I tried, when I had 4G LTE, voice wouldn't work and whenever voice worked, I was back to H+.
If others are reporting that T-Mobile works reliably on 4G and nobody can figure out how to make this work for AT&T, I guess it's time to switch to T-Mobile.
Click to expand...
Click to collapse
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.

It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!

motorhead_biker said:
No. Hold on. I have a solution for ATT too. I tried something last night. Actually while I was working on a solution for ATT I found that we don't even have to go through the steps I mentioned in my OP to solve the problem. It boils down to invoking a service and killing a native VZW service.
The ATT solution I have works but in low signal area 4G fades and it doesn't fallback to 3G or H+. I had to recycle data to get 3G or H+.
Click to expand...
Click to collapse
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Yeah I know. I also know why that is happening. Actually I think it's a bug in the baseband firmware. But we can fix that issue by just overriding the command that was sent by baseband firmware.

ron.r said:
It's Working!!!!!!!!! Thank you!!!!!!!
You just made my life much better now!
I finally have a phone which is great and also finally have good reception!
I Love U!
Click to expand...
Click to collapse
Lol.. rep me in SD :laugh:

konradsa said:
Yes, that same thing happens when you switch to CDMA mode with AT&T. Voice doesn't work then (obviously), but it also doesn't fall back to H+ automatically, when you lose 4G coverage you pretty much lose signal all together.
Click to expand...
Click to collapse
Do you have a working fix for AT&T/Cricket? Is it different than the T-Mobile?

motorhead_biker said:
Lol.. rep me in SD :laugh:
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Click to collapse
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?

I must have really bad luck or something. It doesn't work for me. The Tbsr_cdma timer resets back to 2 at reboot.
Edit: Appears to be working. Nice job!

renoob said:
Ha! You are repped!
What root did you use? and steps?
easyroot?
did you split the file and merge it back?
Click to expand...
Click to collapse
Root? I just flashed the rooted sys image. That's it. instead of copying it in the FAT32 memory card just copy it to your phone's internal and you don't have to deal with split and merge stuff

If it drops out of 4G on a call then you're talking on 1X. So no video chat, no HD voice and no voice + data?

NO VoLTE During Call post Nougant update.

Just wondering if by chance if anyone is still getting that issue where you drop to 3g while on call post Nougant update??????

Working fine for me

Masterx9 said:
Just wondering if by chance if anyone is still getting that issue where you drop to 3g while on call post Nougant update??????
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Click to collapse
What network you are using?? & on which ROM

qasimtb said:
What network you are using?? & on which ROM
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Click to collapse
T mobile and pretty much I've tried every nougant ROM all the way up to the recent 7.1.1 beta. If I roll back to marshmallow everything is fine which led me to believe that something got tweaked in the nougant update that killed VoLte

Masterx9 said:
T mobile and pretty much I've tried every nougant ROM all the way up to the recent 7.1.1 beta. If I roll back to marshmallow everything is fine which led me to believe that something got tweaked in the nougant update that killed VoLte
Click to expand...
Click to collapse
Here everything works fine for me. As I am an Indian so using JIO network which supports VoLTE and I can make and recieve the calls using the network.
Have you tried to enable enhanced 4G LTE mode in the SIM settings.

qasimtb said:
Here everything works fine for me. As I am an Indian so using JIO network which supports VoLTE and I can make and recieve the calls using the network.
Have you tried to enable enhanced 4G LTE mode in the SIM settings.
Click to expand...
Click to collapse
Yep and i even went as far as to go into the secret menu and tell it to grab only lte, which it does but as soon as a call is initiated from reason its drops the 4g connection and sticks to 3g/hsdpa. Then takes its sweet time to reconnect to lte after said call if it does it at all.

Masterx9 said:
Yep and i even went as far as to go into the secret menu and tell it to grab only lte, which it does but as soon as a call is initiated from reason its drops the 4g connection and sticks to 3g/hsdpa. Then takes its sweet time to reconnect to lte after said call if it does it at all.
Click to expand...
Click to collapse
Maybe a firmware issue cause even after you are selecting LTE only then also it is switching to HSDPA. Weird.... You can try to flash the firmware file again & check if the issue is resolved. You can find the firmware from Jamal's thread.

qasimtb said:
Maybe a firmware issue cause even after you are selecting LTE only then also it is switching to HSDPA. Weird.... You can try to flash the firmware file again & check if the issue is resolved. You can find the firmware from Jamal's thread.
Click to expand...
Click to collapse
Tried that too, I ever redid the apn's. At this point i just left it on 6.0, in all honesty i may trade this phone eventually anyway starting to miss having a lot of storage space. Especially with the job and all.

Masterx9 said:
Tried that too, I ever redid the apn's. At this point i just left it on 6.0, in all honesty i may trade this phone eventually anyway starting to miss having a lot of storage space. Especially with the job and all.
Click to expand...
Click to collapse
If you want to use 6.0 then go for Sultan's CM. It's best of all. Very much stable with latest updates.

qasimtb said:
If you want to use 6.0 then go for Sultan's CM. It's best of all. Very much stable with latest updates.
Click to expand...
Click to collapse
yep thats what ive been running.

Masterx9 said:
yep thats what ive been running.
Click to expand...
Click to collapse
Perfect ROM....

Masterx9 said:
Yep and i even went as far as to go into the secret menu and tell it to grab only lte, which it does but as soon as a call is initiated from reason its drops the 4g connection and sticks to 3g/hsdpa. Then takes its sweet time to reconnect to lte after said call if it does it at all.
Click to expand...
Click to collapse
I'm sure in there you seen that the voLTE provisioning is toggled on. I have only been able to get voLTE to work on official oxygenOS post Nougat and not any modded ROMs based on OOS such as experience or freedomOS. Toggling the voLTE in the status bar settings can tell you if it is working because the icon will show up there when it is. Turning that on and off seems to make it turn on at least for me after flashing the open betas which are the only OOS Nougat that I have tried.

GovernorHawk said:
I'm sure in there you seen that the voLTE provisioning is toggled on. I have only been able to get voLTE to work on official oxygenOS post Nougat and not any modded ROMs based on OOS such as experience or freedomOS. Toggling the voLTE in the status bar settings can tell you if it is working because the icon will show up there when it is. Turning that on and off seems to make it turn on at least for me after flashing the open betas which are the only OOS Nougat that I have tried.
Click to expand...
Click to collapse
Could you provide a screenshot​ of how it looks. So could you still retain root on the official image ?

HTC One M9 - GSM Network Issue

Hello guys!
My HTC One M9 is giving me some headaches!
What is happening is that if I'm inside home, I cannot get GSM network. This happens for both voice and data.
As soon as I go outside, I get the 4G working like a charm. I could live with this, but sometimes I need to sleep inside home
From my troubleshooting around this, I found out that if I reset the phone, there is no change.
Reset network settings does nothing.
Sometimes if I restart the phone I get network, but it goes away quickly.
No change if I enable and disable the flight mode.
What does work is if I set the network mode to be 2G only, then I have the network and all works (except the data with some low speeds).
The phone is now with the build 4.28.401.3
I've tried different RUUs and it is the same thing.
Can someone help to try to understand what can be the cause for this?

.... could it be a network issue?

computerslayer said:
.... could it be a network issue?
Click to expand...
Click to collapse
Of the phone, yes.
I've tried the SIM card on another phone and it works really great! I've tried a different SIM card on this phone and it is the same thing. Loss of connectivity.

kulyboy said:
Of the phone, yes.
I've tried the SIM card on another phone and it works really great! I've tried a different SIM card on this phone and it is the same thing. Loss of connectivity.
Click to expand...
Click to collapse
Yes, I have noticed a similar issue and it has been very annoying. I know that in my area, I can get 4g+, but it only picks it up sometimes and goes away. Also, I have very strong 4g signal around my area but for some reason, it always uses 2g and sometimes gives my 4g, but rarely. I think it has something to do with the way sense automatically switches between networks.
Try typing in *#*#4636#*#*, press phone information and where it says some thing like lte/wcdma auto and select what you prefer. I chose lte/wcdma and now I only get 4g and 3g signals which is acceptable. If you want GSM or something, choose it as preferred. Play around with the different ones and see which is best for you.
If not, try a non sense rom, I don't know if that would help but give it a go.
Hope this helps,
Jev

Well, I've tried different settings, but it does the same. Only when using 2G or GSM only it works inside home.
I am yet to test with a non-sense ROM. Because for me, having an HTC is also because I like sense.
Either way, it seems to me that it can be hardware and not software.
Do someone knows what controls this network settings? A different board? A chip?

You mention applying the Nougat RUU for your phone - did you first update to Nougat via OTA?

The update was made via OTA. A regular update but this was already happening before the update.

kulyboy said:
The update was made via OTA. A regular update but this was already happening before the update.
Click to expand...
Click to collapse
:-/ Darn. Good on you for updating correctly, for sure, but that eliminates the problem I was anticipating.

Could be a carrier issue. If the other phone that has a good signal is an m9 then obviously your phone has a fault. If it was a different model and/or brand then you should learn something about "industry standards" as far as signal detection and interpretation goes. Just because one certain type/model/brand of phone has a good signal it doesn't mean another "has to".
Beamed in by telepathy.

Mobile data issue after pie update

Hey,
after updating to android pie I have problems with mobile data. In my area I usually have 4G or 3G but I now only have 2G a lot of times. I even compared the coverage with a friend who has the same provider as me but an iPhone, and she had 4G while I only had 2G. It also seems like I can't receive or send any WhatsApp messages unless I am connected to the WiFi.
Does anyone else have these kinds of problems, especially those living in Europe (I live in Germany)? Is there maybe a problem with LTE band 20? (my phone is not rooted, so I am unable to check)
I have the global version btw, and everything worked fine under oreo

dieterbohlen187 said:
Hey,
after updating to android pie I have problems with mobile data. In my area I usually have 4G or 3G but I now only have 2G a lot of times. I even compared the coverage with a friend who has the same provider as me but an iPhone, and she had 4G while I only had 2G. It also seems like I can't receive or send any WhatsApp messages unless I am connected to the WiFi.
Does anyone else have these kinds of problems, especially those living in Europe (I live in Germany)? Is there maybe a problem with LTE band 20? (my phone is not rooted, so I am unable to check)
I have the global version btw, and everything worked fine under oreo
Click to expand...
Click to collapse
I am also facing this issue, my internet keeps turning on and off even when i have full network, running on pie

Jadz.31 said:
I am also facing this issue, my internet keeps turning on and off even when i have full network, running on pie
Click to expand...
Click to collapse
You can try to reset the APN settings on your phone, that did the job for me!

dieterbohlen187 said:
You can try to reset the APN settings on your phone, that did the job for me!
Click to expand...
Click to collapse
Ok i did, time will speak, thanks for the suggestion

dieterbohlen187 said:
You can try to reset the APN settings on your phone, that did the job for me!
Click to expand...
Click to collapse
Where do I find them please?

Amphibius2 said:
Where do I find them please?
Click to expand...
Click to collapse
Settings=>Network&Internet=>Mobile Network=>Advanced=>Access Point Names=>Reset to default