My iphone cant do (reset all setting)
Today, i woke up and my dad's iphone was lagging i thought because it was old (iphone 6 plus) but what i see is quite strange. Here's my problem , the iphone doesn't give me any networks , plus i tried to shut it down but iy doesn't work either. So i guess that i should reset all setting however i cant click the reset button . Because when i click on reset nothing appear it only lag then get out of the settings . Please can anyone help me
iPhone 6 Plus, iOS 12