i9305 not wokring 2G network in Android 5.1 - Galaxy S III Q&A, Help & Troubleshooting

Hi,
I have a problem with 2G (edge, I didn`t try GPRS) networks on my i9305 in Android 5.1. I can connect to 3G and 4G without problem, but for 2G I get only an exclamation mark on the side of the signal icon and no connection. I tried several ROMs, which I found here and my own cm12.1 build (I actually started with that one) - all with the same result:
AOSP-5.1.1-20150605-i9305-rodman01.zip
BlissPop-v4.0.3-i9305-UNOFFICIAL-20151011-2232.zip
LS-LP-v4.1-2015-10-23-liquid_i9305.zip
Sammy_Resurrection-Remix-LP-v5.5.9-20151122-i9305.zip
cm-12.1-20151201-UNOFFICIAL-i9305.zip (from winxuser)
I did some debugging and discovered that the problem is in wrong data coming from rild. I described it with more details here: forum.cyanogenmod.org/topic/118467-how-to-debug-non-working-2g-network I even found on the web some logs with the same wrong value and posts describing similar or the same behavior. I also found some posts saying, that it is fixed, but I can`t find any ROM, where it is working.
As you can see in my post on cyanogenmod forum, I have a solution, but not a nice one. It is a hack. So I want to ask – is there someone who had the same problem and fixed it? Or some who has the same phone and not this problem? If yes, how did you fix it? Exactly which ROM, prorietary files did you use?
Thank you
Pavel

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OK, I am giving up. I tried several more ROMs:
Slim-i9305-5.1.1.beta.0.9-UNOFFICIAL-20151024-2015.zip
aicp_i9305_lp-10.0-NIGHTLY-20151128.zip
cm-12.1-20151202-UNOFFICIAL-i9305.zip
nameless-5.1.1-20151019-i9305-NIGHTLY.zip
The result is still the same. Maybe it has something to do with carrier operator (but I don`t have this problem in cm 11). I found fix similar to mine, which I described in cyanogenmod forum, so I`ll use that. See here github.com/CyanogenMod/android_device_samsung_jf-common/blob/cm-12.1/ril/telephony/java/com/android/internal/telephony/jflteRIL.java if you are interested. Specifically method responseVoiceDataRegistrationState. It replaces the wrong rild data in the same way.

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I have the same problem @p.a.n.
Please tell me how I fix it, even if it´s a hack... Thanks

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Hi,
here is the final diff I use:
Code:
project device/samsung/smdk4412-qcom-common/
diff --git a/ril/telephony/java/com/android/internal/telephony/smdk4x12QComRIL.java b/ril/telephony/java/com/android/internal/telephony/smdk4x12QComRIL.java
index 0e8d798..619be34 100644
--- a/ril/telephony/java/com/android/internal/telephony/smdk4x12QComRIL.java
+++ b/ril/telephony/java/com/android/internal/telephony/smdk4x12QComRIL.java
@@ -409,8 +409,8 @@ public class smdk4x12QComRIL extends RIL implements CommandsInterface {
case RIL_REQUEST_UDUB: ret = responseVoid(p); break;
case RIL_REQUEST_LAST_CALL_FAIL_CAUSE: ret = responseInts(p); break;
case RIL_REQUEST_SIGNAL_STRENGTH: ret = responseSignalStrength(p); break;
- case RIL_REQUEST_VOICE_REGISTRATION_STATE: ret = responseVoiceDataRegistrationState(p); break;
- case RIL_REQUEST_DATA_REGISTRATION_STATE: ret = responseVoiceDataRegistrationState(p); break;
+ case RIL_REQUEST_VOICE_REGISTRATION_STATE: ret = responseVoiceDataRegistrationState(p,false); break;
+ case RIL_REQUEST_DATA_REGISTRATION_STATE: ret = responseVoiceDataRegistrationState(p,true); break;
case RIL_REQUEST_OPERATOR: ret = operatorCheck(p); break;
case RIL_REQUEST_RADIO_POWER: ret = responseVoid(p); break;
case RIL_REQUEST_DTMF: ret = responseVoid(p); break;
@@ -580,9 +580,16 @@ public class smdk4x12QComRIL extends RIL implements CommandsInterface {
}
private Object
- responseVoiceDataRegistrationState(Parcel p) {
+ responseVoiceDataRegistrationState(Parcel p, boolean data) {
String response[] = (String[])responseStrings(p);
if (isGSM){
+ if(data &&
+ response.length > 4 &&
+ response[0] != null && response[0].equals("1") &&
+ response[3] != null && response[3].equals("102")){
+ riljLog("responseVoiceDataRegistrationState overriding 102 -> 2");
+ response[3]="2";
+ }
return response;
}
if (response.length>=10){
Or you can try replace /system/framework/telephony-common.jar with attached telephony-common.jar, but be careful with that (make backup), I can`t guarantee that it will work with the rest of your system.