Fully Guide for ROOT + Permanent Fix Marshmallow IMEI + Nvram warning err 0x10 or 0x02

This fix works for all mediatek phones (going to give Wiko Fever 4G Files)

This is the complete guide, if you want to skip steps, it's ok.

Format your phone:

Step 1: So, download marshmallow rom of your phone (for wiko fever 4g users is MM V31 DOWNLOAD HERE)

Step2: SP Flash Tool v5 DOWNLOAD HERE and load the MT****_Android_scatter.txt clicking on "Scatter Loading" button and DOWNLOAD ONLY and click DOWNLOAD
For Wiko Fever 4G users, only click on FEVER Marshmallow_V31.exe file

**** is the MTK socket version, for wiko fever 4g is MTK6753;
For Battery users just turn off your phone, connect your usb cable to your phone and insert battery again
For Non Battery users, just turn off your phone, connect your usb cable to your phone (If it doesn't work, disconnect and connect usb cable and it should work)


ROOTING YOUR PHONE

Step1: Don't costumize too much your phone (In case of formatting), coz it will erase all your phone data. Just go directly to Definitions/Options - About Phone - Tap a lot of times on Compilation Number until it gives the message of programmer.

Step2: Above "About Phone", click on "Programmer Options" and "enable OEM" and "USB Debugging".

Step3: Turn off your phone, connect it to your phone and go to your phone's Fasboot/Bootloader mode.
For wiko fever 4g users, tap on/off button + Volume Up and choose Fastboot mode.

Step4: DOWNLOAD HERE a boot image for your Phone. For wiko Fever 4G DOWNLOAD HERE it contains other files you can use next.

Step5: DOWNLOAD HERE and install ADB Files.

Step6: On the ADB files folder (Inside C:\adb, press SHIFT + Right button and select Open Command Window here)

Step7: Type the command: fastboot oem unlock and in your phone press volume up to select Yes. Type the next command fastboot reboot

Step8: After several reboots, now you can costumize your phone. After, go to Definitions/Options - Programmer Options and enable again OEM or USB Debugging in case they are unable.

Step9: DOWNLOAD HERE SuperSU and insert the zip file in your SD card.

Step10: Insert the ONLY THE RECOVERY file DOWNLOADED IN THE STEP4 inside the C:\adb folder, and go to Fastboot/Bootloader options again. Now insert the command: fastboot flash recovery recovery.img 
recovery.img is the name of the file, so modify the same as your recovery file name.

Step11: Next press turn off button on your phone and go to recovery. It will appear the logo of Hanuma.

Step12: In TWRP menu, press Install/SD or MIcro Card, select Supersu zip file, select zip signature verification and Swipe to confirm flash



FIX IMEI AND NVRAM

Step1: DOWNLOAD HERE SN Write Tool. 

Step2: Now on your phone, go to System/Etc/mddb and copy to your SD card the file beginning with BPLGUInfoCustomAppSrcP. If you have multiply files like this, download ALWAYS the first on your list. For wiko fever users, DOWNLOAD HERE

For APDB file, go to your phone's Rom folder and it should be there. For Wiko fever 4g is in the same zip as the BPLGUInfoCustomAppSrcP.

Step3: Turn off your phone and connect the usb cable. On SN Write tool:

ComPort: USB VCOM;
Target Type: Smartphone
Click on System Config: Select: Barcode, IMEI, BT Address, Wifi Address and DUAL IMEI if your phone is dual sims.

CLICK on "MD1_DB" button and choose your BPLGUInfoCustomAppSrcP file.
CLICK on "AP_DB" button and choose your APDB file.
CLICK on SAVE button

Step4: Click START and insert:
Barcode: should have 13 numbers and it's on your phone's case nearby a barcode.
IMEI: It's also in your phone's case and it's usually 15 numbers nearby barcode with S_IMEI (first imei) M_IMEI (secound imei)
Wifi address: This comes from your local wifi connection. Normally this step people recommend you to see this in your phone, but your invalid nvram warning err wifi address is corrupted, so I advise you to see in another phone. Just connect another phone to your local wifi and go to: Definitions/Options - About Phone - Estatus - Wifi Mac Address, you should see something like bc:40:60:60:a6:d2. In Wifi Address filed insert BC406060A6D2.
BT address: Insert BC4060602D6A
CLICK OK and disconnect, connect your phone to your pc.


With these your phone should fix everything. IF it says fail in the step4, it's because you are using the wrong BPLGUInfoCustomAppSrcP or APDB file or inserted the wrong values.