[GUIDE] Fixing OPO CM11S modem problem

reinerlee

Senior Member
Mar 20, 2010
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*** After gathered most of the comments around, I think only China version OPO having this problem ***

Some of you may encounter some problems as me while running on CM11s (Regardless of version 22Q/22R/25R)

These are the symptoms that you may encounter if your modem are not running correctly.

4G = Data connection alright, but unable to make any calls. (While trying to call, "Out of service area" will be displayed)
3G = Data connection not stable, signals are dropping, calls are dropping.
2G = Both Data and Call network are fine, but no one is going to use 2G in a high performance phone like our OPO.

These steps "MAY" or "MAY NOT" work on your phone, I'm not a very professional guy in android development. But I am here to sharing my experiences in solving this problem

1) Download the modem bin file from this link (This is extracted from CM11 Snapshot m8 - https://download.cyanogenmod.org/?device=bacon)
You can download the zip file from there. then extract "NON-HLOS.bin" from the zip file

Here I provide you a mediafire link for quicker access:
http://www.mediafire.com/download/uukgumzi2hf6ey5/NON-HLOS.bin

2) Copy "NON-HLOS.bin" into same directory as fastboot.exe

3) Boot your OPO into fastboot mode.
4) Follow the steps in the CMD of this attached photo
Capture.PNG

P/S: there are a lot of guides which make your phone connect with your PC thru adb interface. so you can google around these information.

Again I'm not an expert, but I got these working, there are risks of bricking/damaging your phone. so take care :)
 
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kyleallen5000

Senior Member
Apr 23, 2010
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Tampa
I'm having a similar issue but my phone is the International not the Chinese version, I assumed I couldn't make calls on 4g because T-mobile VoLTE isn't out yet. I'm very tempted to try this to see if it solves my terrible reception issue. What are the risks in doing this?
 

reinerlee

Senior Member
Mar 20, 2010
216
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0
I'm having a similar issue but my phone is the International not the Chinese version, I assumed I couldn't make calls on 4g because T-mobile VoLTE isn't out yet. I'm very tempted to try this to see if it solves my terrible reception issue. What are the risks in doing this?
I think, there is almost no risk of doing this. if this can't work on your phone. you can just simply swap the modem with the others one.
 
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tdamocles

Senior Member
Aug 11, 2009
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I was messing around flashing roms(last flash was oneplus aosp) with twrp and I lost my modem(baseband) and do not have voice or data. I tried flashing just NON-HLOS.bin but did not regain the baseband. What to do?
 

NaterTots

Senior Member
Feb 7, 2012
1,472
758
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CT
I was having terrible connection issues when I received my Opo.

I ended up flashing the latest CM nightly, since it includes the radio now, and that greatly improved my connection.

Before at home I was going 50% with no signal. Now it doesn't drop. I used the 7/24 build. Then went back to my PA backup.

Sent from my One using XDA Premium 4 mobile app
 

coolguy949

Senior Member
Nov 4, 2008
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Orange County, CA
Awesome! This is encouraging to hear. The radio issues are my biggest gripe with the phone. Even right now as I type this it's jumping between H and H+ when I should have LTE.

Is there a separate radio file from the nightlies we can flash in the mean time?

Edit: OK LTE is back!

Sent from my OnePlus One using Tapatalk
 
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dainys

Senior Member
Jan 5, 2006
60
9
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Vilnius
poor reception

I flashed this modem but problem still exist. I don't have 4g coverage in my area so I basically use 3g (HSDPA+) and I noticed that the signal strength is not quite as good as other phones in the same area. And signal strength goes up and down all the time, from -80 dBm to -107 dBm and sometimes even switches to the 2g (EDGE). Also noticed that if the phone is downloading data signal strength is good, around -80 dBm. In idle signal strength goes down and became poor, around -101 dBm.
 

fathervic

Member
Jan 25, 2010
19
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Thank you - works a treat!

Would I be right in saying that if I factory reset my phone, I would keep the radio I flashed rather than revert back to the original as it has been overwritten?

Thanks

Sent from my Nexus 7 using XDA Free mobile app
 

reinerlee

Senior Member
Mar 20, 2010
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I flashed this modem but problem still exist. I don't have 4g coverage in my area so I basically use 3g (HSDPA+) and I noticed that the signal strength is not quite as good as other phones in the same area. And signal strength goes up and down all the time, from -80 dBm to -107 dBm and sometimes even switches to the 2g (EDGE). Also noticed that if the phone is downloading data signal strength is good, around -80 dBm. In idle signal strength goes down and became poor, around -101 dBm.
are you using international version or China version?

Sent from my One using XDA Free mobile app
 

dainys

Senior Member
Jan 5, 2006
60
9
0
Vilnius
are you using international version or China version?

Sent from my One using XDA Free mobile app
I'm using China version. But I don't think there is difference, people on official oneplus forum have the same inconsistent reception signal.
Yes, this modem behaves better than older versions, but still not as good as other phones.
 
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