Ususal manual for LG E400 smart phone

Perform a hard reset on the device, following these: http://www.hard-reset.com/lg-optimus-l3-e400-hard-reset.html

That will erase all data and apps; including the virus.

If you have forgotten the pattern it will ask you for your gmail login. If not then you need to do a hard reset which will bring your phone to factory reset and you will loose all your data on phone (contacts, messages, apps etc).

Please refer to this link for hard reset. How to Hard reset recovery LG L3 E400

is your phone internet active, can you go to your carrier brand homepage... try to go to your carrier homepage, if your phone connects then there is something wrong in your google program.

Hi, you can get the factory unlocking code with the following service for your phone model: http://www.fastgsm.com/en/lg/lg/optimus-l3-e400/unlock-code-usim-locked

how to activate gprs on lg e400

All data will be lost! Remember to back up any important data before doing a hard reset.

When the phone is turned off, press and hold the Home key + Volume down key + Power key for over 10 seconds. When the screen shows the LG logo, release the Power key.
After the screen shows the hard reset screen, release the other keys.
Leave your phone for at least a minute while it performs the hard reset, then your phone will be turned on.

anothewr way is :

reset phone to factory settings and erase all the data on your phone, touch Menu > Settings> Privacy > Factory data reset > Reset phone.

Resetting the phone does not erase any system software updates you have downloaded or any files on your microSD card,
such as music or photos. If you reset the phone in this way, you are prompted to re-enter the same information that you did when you first started Android.

How can I install Japanese Language in LG E400 ......?
I want to use mail and massage by Japanese Language ..........

hi ,
All data will be lost! Remember to back up any important data before doing a hard reset.

When the phone is turned off, press and hold the Home key + Volume down key + Power key for over 10 seconds. When the screen shows the LG logo, release the Power key.
After the screen shows the hard reset screen, release the other keys.
Leave your phone for at least a minute while it performs the hard reset, then your phone will be turned on.

All data will be lost! Remember to back up any important data before doing a hard reset.

When the phone is turned off, press and hold the Home key + Volume down key + Power key for over 10 seconds. When the screen shows the LG logo, release the Power key.
After the screen shows the hard reset screen, release the other keys.
Leave your phone for at least a minute while it performs the hard reset, then your phone will be turned on.

GO TO SETTINGS THEN MOVE DOWN FROM,, WIFI ICON,THEN TELEPHONE ICON, THEN SOUND ICON, THEN SUNLIGHT ICON, THEN HOME ICON,, THEN ANDROID ICON , THEN RECYCLE ICON, THEN FENCE ICON, THEN SD ICON, THEN NEXT TO IT IS THE "Aa" INSIDE A RED BOX ICON,, PRESS ON IT.. AND THERE YOULL HAVE LANGUAGE OPTIONS,,