For semi soft adhesive mastic use 120 grit sandpaper to remove it from the wall.
How to remove tile backsplash from wall.
With the removal of the one tile keep going under the surrounding tiles gently popping the tile from the wall by prying it from the wall using the scraper and hammer.
Unfortunately if the tile was installed directly on drywall that hope is probably unrealistic.
Ceramic wall tiles provide an easy to clean surface for kitchen backsplashes and bathroom walls.
Finish sanding the entire wall with 120 grit sand paper on drywall sanding pad.
To remove thinset use a stiff putty knife and some elbow grease to scrape it from the wall.
Remove strategic large chunks of tile drywall.
Work the grout scraper in a downward motion and work side to side to gently loosen the tile from its hold against the wall.
Once the tile is down take a 5 in 1 tool and scrapper to remove any excess grout.
Fill drywall gouges with drywall joint compound and sand it smooth.
If you go in at any kind of an angle you will smack right into the drywall.
This method will require you to replace the entire section of drywall behind your existing tile backsplash using an all purpose or wood bit on a multifunction tool also known as a dremel tool cut through the drywall all around your tile backsplash.
The grout that binds the tiles together and to the wall needs to be gently removed.
I cannot stress to you enough that you need to keep your chisels and 6 in 1 tool parallel with the wall when attempting to remove the tile.
Since they are available in a wide variety of colors designs and sizes they fit into any decor.
A grout scraper can get between the ceramic without cracking them and causing serious damage when you remove the tile backsplash.