Can I use LOCA glue on all Samsung Galaxy S-Models?

Theres quite a bit more to it than this but the short answer is yes, you can do a loca repair on most any galaxy series phone because of the way the display is built. Other manufactures of phones aren't as easy because the digitizer is a part of the glass.

Nearly all the samsung displays are amoled and not lcd technology. only a few exceptions to this. Because of that there is no backlight to damage. On an iphone, you should have removed the backlight prior to attempting to do a loca repair on it. Also you should be using an appropriate amount of loca that you don't make a giant mess of it to clean up later. Using too much damages the displays and problems will come up later, much like water damage, especially if you are doing them in the frame. Not to mention the giant mess you make then have to clean. The other side of that is don't use too little and not have adequate coverage/thickness. There's no formula or list of how much to use on what, everyone eyeballs it and learns from experience.

The sony and HTC devices can go somewhere and rot as far as I'm concerned...