[GUIDE] Fixing OPO CM11S modem problem

[reinerlee]

*** 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


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

 

[canibz]

Thank you! I'll give it a try

 

[omarvel0us]

Is this to get the international modem? @reinerlee

 

[reinerlee]

Is this to get the international modem? @reinerlee

I don't really get you.. if you had the symptoms stated above. then you should do this.

 

[omarvel0us]

@reinerlee i was wondering if the modem you posted is the international one to get 4g in USA with the Chinese opo?

 

[reinerlee]

@reinerlee i was wondering if the modem you posted is the international one to get 4g in USA with the Chinese opo?

As far as i know, No. it's more on the hardware side (chipset). it can't be fixed via any software.

You can refer to this.

http://digiex.net/guides-reviews/gu...s-one-china-lte-bands-what-you-need-know.html

 

[omarvel0us]

@reinerlee so there isn't a flashable modem to get 4g lte in USA with Chinese opo? I only get hspa +

 

[reinerlee]

@reinerlee so there isn't a flashable modem to get 4g lte in USA with Chinese opo? I only get hspa +

dude, there's no way to do it via flashing anything. it's the hardware.

 

[kyleallen5000]

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]

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.

 

[Suberip]

Thank you man. You are my God. Works fine and you solve my problem.

 

[coolguy949]

What problem did you have? I'm on AT&T and have trouble keeping strong LTE compared to other phones. My phone will drop to H+ and get stuck in H a lot.

Sent from my OnePlus One using Tapatalk

 

[tdamocles]

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]

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]

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

 

[dainys]

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]

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]

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

 

[rahtrip]

I do get more consistent 4G/LTE signal after flashing this .. thank you!

 

[dainys]

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.