Any other way to fix a iphone 4 screen easier?

Is there any other way instead of unscrewing all those little nails or anything? I mean don't call me lazy but I don't want to mess anything up. Like can't I just use the suction thing and just suction the screen off?

There are screws that are holding the screen in place. If you are trying to do the screen replacement yourself the hardest part is keeping track of which screw goes were. There are some easy tutorials on youtube that you can look at there step by step. (just figure out with iphone model you have, either cdma or gsm)