[TUT][N,O] WIFI region code Fix for RR , Carbon(Roms based on it) and cypherOS

Hello Guy today I want to teach you how to fix WiFi region code problem on Nought and Oreo roms

FIX FOR NOUGHT ROMS AND OREO ROMS(ONLY FOR BUILDS BEFORE 19/1/2018)(NOT FOR cypherOS)
If you are on builds after 19/1/2018 or cypherOS go down ; there is a way with xposed to fix the problem
reqierments :

1. knowing how decompile .jar files (you can use This tool)
2. notepad ++(for editing some files)
3. "telephony-common.jar" from rom (you can find it in "system -> framwork)
4. framwork-res.apk of rom (you can find it in "system -> framwork)(the process may work without it)
** if you see this mark on TUT it means "if you use the tool that is on first requierments"

Steps :

1. install the "framework-res.apk" for apktool (** copy it to "in" folder of tool
then choose " 1 " and choose the "framwork-res.apk" of rom)

2. decompile the "telephony-common.jar" file and go the folder of the decompiled file (** copy the file to "in" folder open the tool and choose " 2 " then choose the "telephony-common.jar" and continue the process to complete decompile and then you can find the folder of decompiled file in "out" folder)

3. After you go to the folder of decompiled file go to " smail -> com -> android -> internal -> telephony " then search for " MccTable " and open it with "notepad ++"

4. on " notepad ++ " search for " setWifiCountryCode " and you will find three lines with it

go to first line

under it you will see " .locals 5 " change it to " .locals 13 "
( as you can see in picture )
first line


then go to second line

go a little upper and found (here is .line 199)(but the line number may change duo to rom)

:cond_1

Click to expand...

Click to collapse

and change the line below of it to

goto :goto_0

Click to expand...

Click to collapse

( as you can see in picture )
second line

there is no need to touch the third line

5. save the file and close " notepad ++ "

6. now recompile the file (** choose " 3 " to recompile the file and choose "telephony-common.jar" and then press NUM "4" option (Recompile, Sign And Then Zipalign)and continue the process to complete recompile )
6.1 ( ** you can find the file on " done " folder)

7. after the recompile completed copy the file to your phone

8. on your phone replace old " telephony-common.jar " with the new one and set permissions and reboot phone

P.S. after the reboot the phone may not boot at the first time (dont worry) just force shutdown your phone ( by press and holding "power button" and "volume up" and phone will vibrate 3 times ) then turn on your phone again
and you will see the problem of region code is gone :good:

FIX FOR all Nought and OREO BUILDS (LOS & RR & CARBON & CYPHER OS)
first of all thanks to @ali6944 for finding this xposed modules

you just need xposed for it and install this modules then active it and reboot your phone and problem is gone :good:

I can't believe I forgot about this, but while I was looking for a fix for nougat months ago I found this xposed module that fixes the issue, but since I got WiFi working before that, I totally forgot about it, I just tried it with the latest Carbon rom and it works! Can't believe it was right there for so long
Here it is http://repo.xposed.info/module/android.wifiregionalfix

for editing we need apk tool or batch apk tool or mt manager. We decompile framework.jar and look for a method in smali along the path android / net / wifi / WifiManager.smali
and we are looking for a method

.method public setCountryCode(Ljava/lang/String;Z)V

then we add one register or locale, if you had ".registers5" then you need to change it to ".registers6", if it was ".locals1", then you need to change it to ".locals2". I think this is all clear

Now consider the transition variables for the correct application of the constant

Consider a piece of code in order to understand how to add a constant

:try_start_2
iget-object v1, p0, Landroid/net/wifi/WifiManager;->mService:Landroid/net/wifi/IWifiManager;

invoke-interface {v1, p1, p2}, Landroid/net/wifi/IWifiManager;->setCountryCode(Ljava/lang/String;Z)V
:try_end_7
.catch Landroid/os/RemoteException; {:try_start_2 .. :try_end_7} :catch_8


in my case, the variables start with "v1"; you can have it differently, for example, with "v0". That is, the added constant I will have with "v2", that is, you need to add one meaning for the new constant that looks like "const-string v2,"US""

and put the constant "const-string v2,"US"" between the ".line 1729" (this value will most likely be different for you) and ": try_start_2 " (your value may differ)

then replace "p1" in a piece of code

invoke-interface {v1, p1, p2}

to the value "v2" (this is the value of our new constant)

Below you can see how it was and how it became. After all the manipulations, you need to recompile framework.jar

As it was

.method public setCountryCode(Ljava/lang/String;Z)V
.registers 5
.param p1, "country" # Ljava/lang/String;
.param p2, "persist" # Z

.prologue
.line 1729

:try_start_2
iget-object v1, p0, Landroid/net/wifi/WifiManager;->mService:Landroid/net/wifi/IWifiManager;

invoke-interface {v1, p1, p2}, Landroid/net/wifi/IWifiManager;->setCountryCode(Ljava/lang/String;Z)V
:try_end_7
.catch Landroid/os/RemoteException; {:try_start_2 .. :try_end_7} :catch_8

.line 1733
return-void

.line 1730
:catch_8
move-exception v0

.line 1731
.local v0, "e":Landroid/os/RemoteException;
invoke-virtual {v0}, Landroid/os/RemoteException;->rethrowFromSystemServer()Ljava/lang/RuntimeException;

move-result-object v1

throw v1
.end method

As it became

.method public setCountryCode(Ljava/lang/String;Z)V
.registers 6
.param p1, "country" # Ljava/lang/String;
.param p2, "persist" # Z

.prologue
.line 1729
const-string v2, "US"

:try_start_2
iget-object v1, p0, Landroid/net/wifi/WifiManager;->mService:Landroid/net/wifi/IWifiManager;

invoke-interface {v1, v2, p2}, Landroid/net/wifi/IWifiManager;->setCountryCode(Ljava/lang/String;Z)V
:try_end_7
.catch Landroid/os/RemoteException; {:try_start_2 .. :try_end_7} :catch_8

.line 1733
return-void

.line 1730
:catch_8
move-exception v0

.line 1731
.local v0, "e":Landroid/os/RemoteException;
invoke-virtual {v0}, Landroid/os/RemoteException;->rethrowFromSystemServer()Ljava/lang/RuntimeException;

move-result-object v1

throw v1
.end method

you may need to replace "p1" with "v1" or "v0" (which is starting in variables) in the following blocks "move-exception p1", "invoke-virtual {p1}", "move-result-object p1", "throw p1".

I hope this instruction will help

ticktock666 said:

Hey there, can you please explain more? What exact modifications did you make, or a link to the 4pda post with the fix?
Is this a fix for the WiFi region issue, or just for the 5ghz WiFi to work?
@Old._.Boy did you manage to apply this fix? I'm trying to look into it too

Click to expand...

Click to collapse

Today I will write a brief instruction

If you are building the ROM , you can immediately edit the source
https://github.com/Raschad/platform...mmit/087750301a18e9df6e1da16da4b38a43ab01a66a