I don't listen to what the salesman say, and especially Lebanese. The official LG website states that it does void your warranty, I don't see why LG Lebanon won't.
LG wroteOnce your phone is unlocked, it will no longer be covered by LG warranty.
As we cannot guarantee the proper operation of our hardware with custom software, we are not able to maintain the full scope of warranty for your device after you have unlocked the bootloader.
Because of that we have a responsibility to let you know that defects which may result from, or were caused by custom device-software may not be covered by LG warranty.
It can negatively affect DRM's behavior for some applications.
LG wroteUnlocking the phone will disable certain functions of your phone.
When unlocking the bootloader, the DRM protection of your phone will become untrusted.
Some applications which require DRM protection may not work anymore or block certain functions due to this untrusted DRM.
Common examples are applications which offer download/streaming of paid multimedia content like music and movies.
It can make your device prone to malware and viruses.
LG wroteUnlocking the bootloader may make your device become vulnerable.
Using custom ROM may lead to monetary damages due to viruses, malwares, and leakage of personal information from hacking. You will be responsible for all such damages that occur after unlocking the bootloader.
It is up to personal preferences, if you see that you can further enjoy your device when unlocking and using custom roms, then go for it. I always prefer not to root my device. For the minor issue I was having, a folder's name constantly displaying in one language, it can be renamed, I just found it weird that you have to manually rename it.
