Very easy to install. I have absolutely no blistering or defects. Follow the instructions and do not delay the installation so that dust does not fall after cleaning the screen. I had a large bubble on one edge of the screen that I couldn't remove right after installation. After two or three days this bubble was gone and it looks perfect on my screen. Was disappointed at first but my advice is wait a few days and the blister may go away. I am very satisfied with this protection and can only recommend it. I've been a Spigen customer for many years and I'm very satisfied with the products.
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