My workmate had broken her phone digitiser so I said I had done this before and it was not too difficult. I bought a display and had a go.

Alas, I found the Samsung glue was a lot harder and did not let go easily. I broke the LCD and had to buy a combined LCD+digitiser.

That was not the end - it did not fit perfectly. I had to file some of the aluminium frame away to accommodate a larger than before ceramic capacitor. The display was a very slightly darker than before, but  was usable.