Well, the fact remains that I have destroyed an trying to redeposit (I put a lot of dust on it but I'm not very good with these films ...).
By against the second attempt (with a second film) was successful! Just a few small bubbles (tiny) to the part where there is the LG logo (so not on the screen) due to small dust. But absolutely no problem.
For the price, I am very satisfied! And matt is really not bad.