Although my Nokia 3720 in 2011 looked quite passable aus..allerdings had the display been a few inevitable scratches and the beautiful yellow of the border gave way to a rather dirty yellow appearance. In short, a new cover was needed and my Nokia create that fresh look '! Fast delivery -without shipping - well and securely packed! Now for installation: I had already in advance googled that a special opening tool was needed - a kind of pick that one around pulling on the rubber seal of the phone to separate the top shell from the Base Cover .. Highly recommended - also here at Amazon a tool set for little money is available! Make sure that a Torx T6 is included in the tool set !!! Furthermore: Torx loosen and (certainly !!!) put away, quite courageously separated with the blue guitar pick at the bottom of the base 3720 and the upper part - from both sides at the same time! If the parts are apart, you only have to carefully unclip the key mat and insert in the new cover, please pay close attention to the cut-outs! So now is with gentle pressure all clipped zusamen and: Voila - fits, has no air, sitting really well and firmly looks like new.! Toll..ich am begeistert..das whole thing lasted less than 10 minutes !!! Therefore 5 star .. Highly recommended!