No major worries

A bit difficult to ask because very electrostatically charged, the film attracts fine dust that stick to the film and find themselves between the film and the screen of the phone which form tiny bubbles (4 or 5) impossible to remove. In the end nothing embarrassing for use. In future I will clean the work area and take cotton clothes. I think these measures will be sufficient. Needless to invest in a "clean room". No big difference with and without the film probably less glare in the sun. (This is not my phone)