Starting at the edge of the wall place the blade against the mastic and give the handle a solid tap with a hammer.
How to remove single wall tiles.
A hammer a good chisel with two ends and a scraper.
Of course that you can do this operation mechanically by using a drill machine with hammering function but if you want to remove the tiles without breaking them it is better to do it by hand.
If you are removing an entire wall of tiles just make sure to remove grout next to the ceiling and floor.
Remove the old grout in the joints around the tile with a carbide handheld grout saw.
Tap the tile down with a flat board and mallet.
Let the mortar cure then grout and seal the joints.
Put the tile in place and twist it back and forth to spread the mortar.
Protect the tiles around the damaged tile.
In order to remove wall tiles one needs several tools.
Removing a single tile from a wall can be trickier.
In most cases the knife will slide under the tile and by simply lifting the handle up the tile will pop off the wall.
Spread a drop cloth below the work area if the damaged tile you plan to remove is a wall tile.
Use a back and forth sawing motion to.