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Tutorial on How to Flash Stock Rom(Original Firmware) of Acer Liquid Z5 (Z150) via Sp Flash Tool
Welcome Acer Liquid Z5 (Z150) Users!
Is your phone bootloop and you can’t fix it because you don’t have any recoveries? Does your phone still experience  lag eventhough your done formating your device or even factory reset(hard reset) it?Facing Deadboot(Hardbrick)? Well, I think flashing it with original firmware is the best solution for your problem.
Acer Liquid Z5 (Z150) Screenshots

Requirements:
PC and USB Chord
Acer Liquid Z5 (Z150)

Download the following:

Drivers:
MT65xx-USB-Driver
MT6577 USB VCOM Drivers

Sp Flash Tool: 
Sp Flash Tool

Stock Rom(Original Firmware):
Acer_Liquid_Z5_Z150_Stock_ROM

Scatter File:
Scatter File

 

We are not responsible if anything happens to your phone.

Step by Step Tutorial Fo Flashing Stock Rom(Original Firmware) Using Sp Flash Tool:

*This can fix bootloop
*Phone lagness
*Making back the Original Rom

1. Ready your cable and phone. Must have atleast 70% charge. Phone must be turned off.
2. All of the files are in zip file, so you need to extract them all.Better if you will make one folder for your files then extract it.
3. Enable USB Debugging mode in your phone.
4. Install all MT65xx-USB-Driver
5.Install  USB VCOM Drivers
In Device Manager Right click on PC name(Right Side) and then click on Add legacy hardware as shown in image below.

 USB VCOM Drivers Screenshots
Now in Add Hardware Wizard click on Next » Install the Hardware that i manually select from a list (Advanced) » Show All Devices » Next » Have a Disk, Now select the any inf file from where you extracted the downloaded VCOM driver package.
USB VCOM Drivers Screenshots

Now Click on Next and select Install this driver software anyway and wait for finishing the process.

 

USB VCOM Drivers Screenshots
4.  After installation is finished then Restart your computer, That’s it.
5. Open Flash tool click on the Download Tab
Extract the downloaded Acer Liquid Z5 (Z150) stock rom to the new folder you created.
(NOTE: I’m using other screenshots of other phone since I don’t have that device though the process is still the same so no worries).

Sp Flash Tool Screenshots

 

6. Click Scatter-loading and browse for the scatter file (MT6575_Android_scatter)
7. For Bootloop only
Make sure flashing mode is set to “Download Only” and check mark all except Preloader.
Note: If deadboot/hardbrick set “Download+Format” and check Preloader.
8. Click Download.

Sp Flash Tool Screenshots
9. Turn off your phone, connect your phone to the PC and wait for the flashing to commence.
10. Green Circle image with check will show once flashing is completed. That’s it!

Sp Flash Tool Screenshots
11. Disconnect your phone in USB cord then open if still bootloop then try to factory reset in recovery settings. To go in recovery mode reboot your phone hold and press power on and volume up simultaneously until recovery mode appeared.
Hope it helps! Thanks!

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