PS3 Jailbreak 4.20 Download from: http://www.HenchFile.com/jwvcb1tlfzhl
In order to proceed for jailbreaking the device, first you would have to download the launcher tool which would help you jailbreaking the device. You can download it by clicking the download button below.
Once you have finished from downloading, you will have a launcher tool which will download PS3UPDAT.PUP file which is given below.
Now you will have to perform some major steps in order to jailbreak the device properly.
STEP 1: Plug a USB stick into your computer
STEP 2: Create a folder in the root of the USB stick called PS3
STEP 3: Create a folder inside the PS3 folder called UPDATE
STEP 4: Download PS3 Jailbreak 4.20
STEP 5: Run Downloader and start downloading PS3UPDAT.PUP file which will be downloaded on your desktop
STEP 6: Move PS3UPDAT.PUP to the directory UPDATE that you just created on the USB stick
STEP 7: Plug the USB stick into your PS3
STEP 8: Navigate to Settings Tab
STEP 9: Choose System Update
STEP 10: Choose Update via Storage Media
STEP 11: It will say it found Version 4.20 -jb
STEP 12: Choose OK
STEP 13: Accept Conditions and Install Update
STEP 14: After less than a minute, your PS3 will update, beep 4 times then shut down.
STEP 15: Power up your PS3 (You will have to do it on the console and not by the controller)
STEP 16: Your PS3 is now jailbroken!