That time I got reincarnated but stayed a chump [Prototype] [Hedgecog games]

So! Immerse yourself on the world of bright colours, magic and fighting evil as the Isekai protagonist.
The Goddess sent you here to save the world from Demon Lord. Or maybe not exactly?
  Cast spells, swing your sword and fight the necromancers army to reconstruct your smartphone.
The most powerful tool in a fantasy land.