[Samsung Galaxy W I8150] j0rd4nkzf:
Warning

This particular model (SGW or GT-i8150) is extremely prone to soft bricking due to unknown reasons. The phone will get stucked in a boot loop, recovery will NOT be accessible however download and RAMDUMP mode will. There is only ONE warning before your phone brickes forever which is, everything starts to Force Close. And if that happens to you, may I remind you to NEVER EVER restart your phone as that will brick it. Quickly navigate to settings and reset to phone to factory defaults. This problem happened to me when I was using Cow's Bionic ROM (V6) and a few others. And no, this is not caused by left-over data as I have carefully wiped clean any previous data. This happened days after I flashed a custom ROM. I have no idea why this happens and I hope this incident will not happen to you. Some of you advise me to reflash but that does not do anything, Odin will tell me it is successful but when I remove the USB cable it will just get stuck in another infinite boot loop.

Definition

To render your phone useless, as useless as a brick.

Causes

Wrong kernal flashed.

Flashed new ROM without wiping left-over data.

Corrupted ROM

Interrupted flashing

Wrong partition size

Prevention

Always wipe data BEFORE flashing any ROM.

Make sure phone/computer battery is above 50%

Make regular Nandroid backups.

Types

Soft/Semi Bricked

Hard Bricked

A soft brick is when your phone can no longer boot normally to Android. This is easily fixable with re-flashing.

A hard brick is when your phone CANNOT boot at all. This can be fixed with a USB Jig.

Fixing

Soft Brick

Boot phone to download mode with the three button combination (Home+Volume Down+Power).

Download Samsung Kies, Stock ROM , Ancora.ops and Odin Multi Installer.

Connect phone to your computer with the USB cable supplied by Samsung.

Select Ancora.ops as OPS file.

Tick "One Package"

Select One Package file (The Stock ROM that you have previously downloaded)

Click start and wait for approximately 15 minutes.

Disconnect USB when Odin inputs "PASS"

Enter recovery with three button combination (Home+Volume Up+Power) and wipe cache and do a factory reset.

Restart and enjoy!

Hard Brick

Unfortunately, there is no way of fixing a hard brick by yourself without replacing the entire mainboard. You may however send it to any Samsung Service Center if you're under warranty.

Notes (Very Important)

Samsung's warranty does NOT cover bricked phones however you may say that Samsung Kies bricked your phone while upgrading and they MAY repair it for you for free. This repair normally takes around a week or two.

To be even more safe, charge your phone/computer to at least 80% before upgrading anything.

To enter download mode, use the three button combination only until you see an android logo, at that time you must stop pressing the buttons. Press Volume Down to proceed.

To enter recovery mode, use the three button combination to boot and release the power button once you see the Samsung logo. Press on the left touch key once you see an android with a box.

Click here to download Samsung Kies

Click here to download Stock ROM (Search for "I8150" and pick the most suitable ROM.)

Click here to download Ancora.ops and Odin Multi Installer

Sorry if there are any grammar or spelling errors as I'm only 13 years old.

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Thank you for reading!