Can I play with my mobile phone in the house when it thunders?

No problem, it's dangerous outdoors, but it's okay indoors.

It is unsafe to stay outside alone in thunderstorm weather, especially in the open field, because people are the highest point at this time and face the threat of direct lightning. However, even if the phone doesn't answer the phone, it will automatically send electromagnetic waves continuously. Therefore, although no experts have studied the theory of whether electromagnetic waves of mobile phones can attract lightning (induced lightning), for the sake of safety, people should turn off their mobile phones in time when they are outdoors without lightning protection facilities around them in thunderstorm weather.

But it is much safer to move on the streets of the city or stay at home, because the surrounding tall buildings and objects taller than you are better lightning rods.

Therefore, when it thunders at home, you don't have to deliberately not touch your mobile phone, which is safer. Of course, everything has accidents. If it really thunders badly, I suggest putting the mobile phone aside.

I hope I can help you!