Isekai wa Smartphone to Tomo ni

Japanese Title: 異世界はスマートフォンとともに.

English Title: In Another World With My Smartphone

Plot
15-year-old Touya Mochizuki is accidentally struck by lightning and killed by God. As an apology, God allows him to be reborn into a fantasy world along with a single special request. Touya uses his request in order to bring his Smartphone into the new world with him. God also amplifies Touya's physical, magical, and mental prowess to a certain degree as a further apology for the inconvenience of killing him. Taking full of advantage of his second chance at life, Touya befriends many different people in the new world. He begins to travel from country to country, solving political disputes, minor quests, and nonchalantly enjoying himself with his newfound allies.