LG Prada 3 LU5400 hard resetUsing the dial screen key in the following LG Prada reset code: 2945#*#, select factory resetPlease note that this reset code is not tested.
or To reset your LG Prada3 phone to factory settings and erase all the data on your phone, Select Settings → Back up and reset→ Factory data reset → Reset device→ Delete all.
Also check Software update
Use PC Suite tool to Backup and restore your data
Select Device > Backup/Restore
or select Device > Emergency firmware recovery option from the menu which will start LG Mobile Support Tool
You can use LG Mobile Support Tool to repair your LG cell phone, after download select menu Customer Support > Recovery Phone (LU5400)
Soft reset Prada 3
You can force restart your phone if you pull out the battery and reinsert it. Use it for emergency restart, if Prada3 is frozen or the screen is not responding to touch.
reset LG-LU5400 Prada 3
Prada 3 ICS, Android Ice Cream Sandwich, Android v4.0