splash screen

This just started this morning. I was camping all weekend, left my 6s in the tent, woke up this morning & the tent was cold & wet, dew, etc. iPhone seem fined but was dead. I tried turning it on and the insert cable screen came up, whatever you want to call it. I plugged it into my car charger...

Hi All, My school installs an extra start up screen in the macbook and macbook air when you start the machine. the company logo comes up and you have to hit the enter key, then it goes into the regular start up user screen. Where you THEN pick a user and login name. HOW can I remove this first...