How to Test Your Xperia Phone [before buy it]

Before you buy a new phone We want to make sure that its working.
In the case of buying an Android phone (Sony Xperia P) follow the below simple test by yourself and verify the functions and hardware of it works correctly.

1. Open the Dialler and enter *#*#7378423#*#* to access the service menu.
2. Tap the Service Test and check each test available (almost everything that we need to check is available there), Keyboard, Touch screen, Display, Camera, mic, seekers, etc...

Sony Xleria P Boot Loader Unlocked Vs Locked

Unlocked	Locked
Can flash customer kernels and/or Roms	Cannot install Custom kernels
May void the warranty of your phone	Can gain the root access without unlocking
DRM security keys will be lost Simply digital rights management (DRM) key are used to manage the copyrights of media files	Can install the Custom Roms
Will not give you root access just by unlocking	Can install CWM Recovery
Certain functions in your phone might cease to work (DRM related,…)
Might also damage your phone permanently. In the worst case (by Overheating with over clocking)
Everything that can do with a locked boot loader J (of course without DRM)

** Sony itself allowed and supporting to unlock some of Xperia NXT series phone (released after 2011) **

To check if your phone can be unlocked, follow the steps below:

1. First, open the dialler and enter *#*#7378423#*#* to access the service menu.
2. Tap Service info > Configuration > Rooting Status. If Boot loader unlocks allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.

For More info: http://unlockbootloader.sonymobile.com/

How to create large files on Windows

We can create new files (any type) with a given size Using the windows command prompt

Go to command prompt (For Win 7 Open CMD as an Administrator)
Use the below command to create the required file
length - Size of the required file in bytes

Usage : fsutil file createnew
   Eg : fsutil file createnew C:\testfile.txt 1000