[Android Q&A, Help & Troubleshooting] sm00th4f3:
So i wanted to flash a new firmware on my MTK Device (UleFone Power 2), but i ran into some Errors while doing so, thus , my phone died in the process.

Following Errors occurred, depending on which (SP Flash Tool;SPMultidownloadflashtool;etc) you use:

Errors:

Internal Buffer

STATUS_SEC_IMGHDR_TYPE_MISMATCH

Through digging and asking on the web, two wonderful and very very helpful people: alterogi and finally Sunray888

This solution popped up. Thank you so much to both of them!!

Solution:

But first: You are now warned, try this at your own risk.

Quoted from Sunray888, alterogi. Credits to them.

My German Guide (more detailed with Pictures): Outside of XDA

Side Note: For the UP2 Rom you use SPMultiPortFlashDownloadProject , for the UK6P ROm you use SPFlashTool.

(Links & Attachments below!) (Adb-Fastboot.zip & Checksum.zip)

Part1:

1. Download all the files. (Below are the links and attached files.

2. Extract each zip to its own folder. Then Put the files of the Checksum.zip into the ROM Folder of the Ulefone Power 2.

3. Run the Checksum.exe and wait until it is done. It will show up in the black CMD when it's finished. A new Checksum.ini should be in the folder now.

Part2:

1. Make a backup of your NVRAM and NVDATA, a full ROM backup if you can.

2. Get the Oukitel K6000 Plus ROm Version 2.0 Ready. Extract it to its own folder somewhere on your desktop.

3. Open the SPFlashtool and select the android scatter file of the Oukitel Rom.

4. Connect your phone, hold Volume down and press on "Download" in the SPFlashTool. Now you wait for the process to end, WHILE still holding the button down.

5. After it is done flashing your new Firmware unto your phone, start it like you would normally do. Disconnect your phone now. You can now also skip the Setup Details, since we still have to flash the original Firmware.

6. Go to Device Infos on the bottom of your phone settings, tap a few times on Build Number until the Developer Options activate. Go back and tap on Developer Options.

7. In here you activate OEM Unlock and USB Debugging. Back to the pc: Now you open a CMD Windows and navigate to your extracted ADB-Fastboot Folder. (Some Pictures of this are on my German Tutorial Thread, Link above).

8.Connect your phone, tick the avaible spot of the upcoming new popup notification. Shutdown your phone now. Hold Volume Up and Power Button at the SAME Time until the Fastboot Menu pops up.

Make sure your phone is still connected to the pc.

9. In the cmd window you will now have to type the following thing: fastboot oem unlock

9.5 Another Method to get into fastboot mode: (OR enabled usb debug, accept connection between your PC and Ulephone and send command fastboot reboot bootloader after that "fastboot oem unlock")

10. After the process is done. You are still in fastboot mode.

And let the phone connected to the Pc.

11. Now you have to flash the original ROM/Firmware. In this case only Version 17 will work.

On this step i had a lot issues with "insufficient buffer"-Errors under SP Flash tool, but there is a solution for this.

Be careful :

Try to use #SPMultiPortFlashDownloadProject Version 3.1620 - only this software worked for me,earlier Versions i tried ( v.3.1636 ) always showed an Error.

Current Status: Phone is still connected to pc, fastboot mode, oem has just been unlocked by yourself.

What to do now:

12 Open the SPMultiPortFlashDownloadProject, load scatter file of the Ulefone Power 2 Firmware, then press scan. Nothing will happen now, so be quick: Don't disconnect your phone.

Press Volume Up + Power Button at the same time to simulate a new connection to the pc. While the phone is still connected via cable! We have to do this. You will now hear a sound which you normally would here when connecting a new device to your Pc. Now you just have to keep holding the Volume Up Key.

IMPORTANT:

Don't let go of the button until the Programm shows up a Green Tick which signals the end of the Process. Now you can let go of the button.

13. After the scan has finished, press start and flash firmware. But how? It's easy. Just do the same again. ->>

13.1 Press Start in the Flash Programm.

13.2 We have to simulate a new connection. Hold Vol+ and Power Button. Until you hear the sound again, now only keep holding the Vol+ Button.

14. Wait for the green Tick Notification. Until then: Don't you dare let go of the Vol+ Button. When it shows up, you're pretty much done. Congrats!

15. Restore NVRAM and NVDATA.[/I] through mtk engineering mode: open dialer and call *#*#3646633#*#* , scroll down to GRPS and type in your IMEI (can be found in the box, in which your phone came shipped with). If it says something like that it's successfully written.-> Activate Airplanemode, wait a few seconds, deactivate it, activate Mobile Data Connection and wait. It should show a mobile data active.

Download Links: (I didn't upload those files,i simply shared the links, all credits to their respective owners. Use at your own risk.!)

UP2 Rom: Google Drive

Flashtool for UP2 Rom: One Drive

UK6P 2.0 + Flashtool: Click me

Checksum Gen Zip: --Below--

ADB Components: --Below--

UPDATING:

After flashing V15 Ulefone Firmware, use the SP FLASH TOOL to flash the newest firmware via "Firmware Upgrade" mode. remember to keep pushing vol up before connecting phone!

How to:

Press Download in Tool

Push and hold vol up

Connect cable to pc.

wait until green tick shows up.

Profit.