User Tools

Site Tools

Translations of this page:

howto:nfzbypass

NFZ Bypass

This page was previously hidden content. The team that has contributed to this work has in a private channel agreed it is time to release this material.

Feel free to contribute / update this material to expand on the details here.

NFZ Removal Tutorial

How to fully remove NFZ from 4.1.22 GO and on your stock firmware drone WITHOUT mixing firmware. These are instructions for MAVIC only for now. Coming soon for Spark,P4, I2. Stay tuned. Following these steps will allow you almost the full monty. All performance mods will work, but you still can’t bypass GO Altitude limits, but you can use stock firmware and NOT have to bypass NFZ in parameters. Yes, you read that right. You will be rid of ALL NFZ zones on the map, all of the pop-ups and warnings in the app and be able to arm and fly ANYWHERE! You will have all other benefits of the FW such as Quickshots, Precision Landing etc.

Just to be clear, this project was undertaken to get around DJIs INCORRECT NFZ and Warning zones that they implemented without any legal obligation or requirement.

DON'T DO ANYTHING STUPID IF YOU PROCEED WITH NFZ UNLOCKING! If you do something STUPID like flying around airports or other aircraft etc, everyone involved in this project will do whatever we can to identify you and provide your info to the authorities! Do not TEST US!

Tools/software needed:

Without getting into the details of what jezzab has done for all of us…here is what you do:

  1. Use DDD and download 01.04.0100/.0200 and or .0300. Not sure if .0300 will work, but you can try it.
  2. Use DUMLdore V3.03 and flash your Mavic to the firmware of your choice in #1. Stock. No mixed firmware, and make sure it is stock, no f’ing around with the files on your bird.
  3. Flash it again, just to make sure, to the same version. No really. Just do it. Stop whining.
  4. Now, close DUMLdore . In the DUMLdore folder you will see the stage2.bin file. Rename this file so the program doesn’t use it. (Example, rename it to stage2original.bin) Replace that file with stage2.bin attached here.
  5. Start up DUMLdore. Hold ALT and click the Load Firmware button and select any firmware file. You will not actually flash the firmware but you must select one to get the process started. Then click on Flash Firmware. You will see stage 1, then stage 2. After its done you will see “Completed. Exit DUMLdore and restart device” it will then quickly change to “Flashing complete. Device may be powered off”. Once you see the last message, you can exit DUMLdore restart the Mavic and you are DONE. If you flash ANY firmware again, it will put the NFZ back on the Mavic. Then you will need to do steps 4 and 5 again.
  6. Don’t forget to rename the stage2.bin file back, or swap it out again.
  7. Man up and send jezzab some LOVE via PayPal. This means you. All the OG’s work hard. Time to pay back and make someone happy. https://www.paypal.me/DUMLdore

Test in an area where you had NFZ warnings before, WITH PROPS OFF. I am NOT telling you to fly in a NFZ. Use your smarts. You are responsible for your flying. Not DJI.

Big switch

Unlocking the entire system with license (big switch):

  • dji/sdk/DJISDKManager
  • silentmode IIRC
  • License.dlf (filename)
  • Base64 coded
  • Com.dji.industy.pilot.homepage.homenavigationmenu
  • .field private final mDeviceLimiter:DeviceLimiter

Led status

Change LED Status (can play with LED speed etc)

getBean

getBean() function that parses param file located at res/raw/flyc_param_infos)

NFZ Flight State Change

NFZ Flight State Change (could potentially change to Flying Normally)

Max Height Param

PnUqLQk4MAN3TCU7DjA+OzVDJCsTcDQFIXUhJw45MRAGGg== g_config.flying_limit.max_height_0

Height Limit (yes/no?)

EU8gJQ8qFQ00Qz0jEzc2Cg== HeightLimitation

Max Radius / Distance Param

PnUqLQk4MAN3TCU7DjA+OzVDJCsTcDQFIXU7IwM3LBcGGg== g_config.flying_limit.max_radius_0

Distance Limit (yes/no?)

HUM6NgYwOgEVQyQrEz8tDTZE DistanceLimitation

Decrypt

Decrypt above with:

python defog_one_string.py 2 STRINGtoDECRYPT

NFZ DB Keys

nfz db encryption keyslkIUOIjf234w4dfaLIKJ793s3j
Geo1860 aes keyhpBzum8Ht1aGpB8YCB2&KcW#jwdaWBx9
Geo aes keyE72AA69EC4B8E342B3DCC3A7834EB
Geo1860 db Signature keyE72AA69EC4B8E342B3DCC3A7834EB

Create NFZ Patch

apktool.yml

remove:

assets/expansion/internal/flysafe/dji.nfzdb.confumix
assets/expansion/internal/flysafe/dji.nfzdb.sig

AndroidManifest.xml

remove:

  <service android:name=“dji.assets.obbdownloader.download.ObbDownloadService”/>
  <service android:name=“dji.pilot.flyforbid.FlyforbidUpdateService” android:stopWithTask=“true”/>

smali_classes3 > dji > data > upgrade > d > a.smali

remove:

.line 202

res > layout > v2_upgrade_data_activity.xml

 <dji.pilot.publics.widget.DJIStateTextView android:enabled=“true” android:textSize=“20.0sp” android:textColor=“@color/white” android:gravity=“center” android:layout_gravity=“bottom” android:id=“@id/v2_upgrade_data_ok_btn” android:background=“@drawable/common_bottom_btn_selector” android:visibility=“invisible” android:layout_width=“fill_parent” android:layout_height=“50.0dip” android:text=“@string/tip_upgrade_data_start” android:maxLines=“1" />
  <dji.pilot.publics.widget.DJIStateTextView android:enabled=“true” android:textSize=“20.0sp” android:textColor=“@color/white” android:gravity=“center” android:layout_gravity=“bottom” android:id=“@id/v2_upgrade_data_finish_btn” android:background=“@drawable/common_bottom_btn_selector” android:visibility=“visible” android:layout_width=“fill_parent” android:layout_height=“50.0dip” android:text=“@string/ok” android:maxLines=“1" />

Current NFZ Patch

RUNME.BAT file

RUNME.BAT
   if "%%f"=="removeNFZ" ( echo.-: Deleting all NFZ db all files...
    del /f /q "assets\expansion\internal\flysafe\dji.nfzdb.confumix"
    del /f /q "assets\expansion\internal\flysafe\dji.nfzdb.sig"
    del /f /q "assets\expansion\internal\flysafe\flysafe_areas_djigo.db"
    del /f /q "assets\expansion\internal\flysafe\flysafe_polygon_1860.db"
    del /f /q "assets\expansion\internal\flysafe\flyforbid_airmap\*.json"
    del /f /q "res\raw\flyforbid.json"
    copy /b NUL "res\raw\flyforbid.json" )

RUNME.SH file

RUNME.SH
  if [ "$patch" == "removeNFZ" ]
  then
      rm assets/expansion/internal/flysafe/dji.nfzdb.confumix
			rm assets/expansion/internal/flysafe/dji.nfzdb.sig
			rm assets/expansion/internal/flysafe/flysafe_areas_djigo.db
			rm assets/expansion/internal/flysafe/flysafe_polygon_1860.db
			rm assets/expansion/internal/flysafe/flyforbid_airmap/*.json
      rm res/raw/flyforbid.json
			touch res/raw/flyforbid.json
  fi

removeNFZ.patch

AndroidManifest.xml

diff -Naur orig/AndroidManifest.xml mod/AndroidManifest.xml
AndroidManifest.xml.diff
--- orig/AndroidManifest.xml	2018-01-25 21:31:44.000000000 -0500
+++ mod/AndroidManifest.xml	2018-01-25 21:36:55.000000000 -0500
@@ -72,7 +72,6 @@
        <service android:name="dji.pilot2.flymonitor.service.FlyMonitorService" android:stopWithTask="true"/>
        <service android:name="dji.pilot.flightrecord.DJIRecordService" android:stopWithTask="true"/>
        <service android:name="dji.pilot.battery.service.BatteryCheckService" android:stopWithTask="true"/>
-       <service android:name="dji.pilot.flyforbid.FlyforbidUpdateService" android:stopWithTask="true"/>
        <receiver android:name="dji.pilot2.publics.receiver.NetworkStatShutdownReceiver">
            <intent-filter>
                <action android:name="android.intent.action.ACTION_SHUTDOWN"/>
@@ -276,7 +275,6 @@
            </intent-filter>
        </receiver>
        <activity android:configChanges="keyboard|keyboardHidden|orientation|screenSize" android:name="dji.assets.InstallActivity" android:screenOrientation="portrait" android:theme="@android:style/Theme.Light.NoTitleBar.Fullscreen"/>
-       <service android:name="dji.assets.obbdownloader.download.ObbDownloadService"/>
        <activity android:label="@string/app_name" android:name="dji.setting.ui.MainActivity" android:screenOrientation="sensorLandscape" android:theme="@android:style/Theme.NoTitleBar" android:windowSoftInputMode="stateHidden"/>
        <activity android:name="dji.checklist.TestCheckListActivity" android:screenOrientation="sensorLandscape"/>
        <activity android:excludeFromRecents="true" android:launchMode="singleTop" android:name="com.dji.update.view.UpdateDialogActivity" android:taskAffinity="" android:theme="@android:style/Theme.Translucent.NoTitleBar"/>

a.smali

diff -Naur orig/smali_classes3/dji/data/upgrade/d/a.smali mod/smali_classes3/dji/data/upgrade/d/a.smali
a.smali.diff
--- orig/smali_classes3/dji/data/upgrade/d/a.smali	2018-01-25 21:31:56.000000000 -0500
+++ mod/smali_classes3/dji/data/upgrade/d/a.smali	2018-01-25 21:45:50.000000000 -0500
@@ -483,8 +483,6 @@
     .line 211
     iget-object v0, p0, Ldji/data/upgrade/d/a;->l:Ldji/publics/widget/dialog/c;
 
-    invoke-virtual {v0}, Ldji/publics/widget/dialog/c;->show()V
-
     .line 212
     return-void
 .end method
@@ -652,8 +650,6 @@
     .line 293
     iget-object v1, p0, Ldji/data/upgrade/d/a;->m:Ldji/publics/widget/dialog/c;
 
-    invoke-virtual {v1}, Ldji/publics/widget/dialog/c;->show()V
-
     goto :goto_0
 .end method
 
@@ -770,8 +766,6 @@
     .line 341
     iget-object v0, p0, Ldji/data/upgrade/d/a;->n:Ldji/publics/widget/dialog/c;
 
-    invoke-virtual {v0}, Ldji/publics/widget/dialog/c;->show()V
-
     goto :goto_0
 .end method
 
@@ -1413,8 +1407,6 @@
     .line 421
     iget-object v0, p0, Ldji/data/upgrade/d/a;->p:Ldji/publics/widget/dialog/c;
 
-    invoke-virtual {v0}, Ldji/publics/widget/dialog/c;->show()V
-
     goto :goto_0
 .end method
 
@@ -1455,8 +1447,6 @@
     .line 435
     iget-object v0, p0, Ldji/data/upgrade/d/a;->j:Ldji/data/upgrade/d/b;
 
-    invoke-virtual {v0}, Ldji/data/upgrade/d/b;->show()V
-
     goto :goto_0
 .end method
 
@@ -1618,8 +1608,6 @@
     .line 482
     iget-object v0, p0, Ldji/data/upgrade/d/a;->q:Ldji/publics/widget/dialog/c;
 
-    invoke-virtual {v0}, Ldji/publics/widget/dialog/c;->show()V
-
     goto :goto_0
 .end method

apktool.yml

diff -Naur orig/apktool.yml mod/apktool.yml
apktool.yml.diff
--- orig/apktool.yml	2018-01-25 16:29:49.000000000 -0500
+++ mod/apktool.yml	2018-01-25 21:25:46.000000000 -0500
@@ -5,8 +5,6 @@
 - arsc
 - data
 - assets/build
-- assets/expansion/internal/flysafe/dji.nfzdb.confumix
-- assets/expansion/internal/flysafe/dji.nfzdb.sig
 - webp
 - so
 - h264
howto/nfzbypass.txt · Last modified: 2018/06/19 08:53 by computerstar2000