Does IPhone usage cause brain tumor?

I've recently been extremely worried about this because sometimes I use my phone for 6+ hours a day. I looked it up and there are many people supporting either sides of the argument. I also feel dizzy and have a headache after using my phone for a long time, so that also causes me to worry. Does anyone know if using cell phones actually causes cancer?

My phone won't open?

My phone won't open it's dead too. I put it in the charger and when i triend to open it it wouldn't open the screen was black. Then i searched it up online and did everything i saw. I held the home button and the power button for 20 seconds but it didn't work then i held the power button for 3 seconds and then i held the home. Button but it didn't open.

Hardlocked in my own Iphone7?

My home button on my phone broke, so i went to turn on touch assist, but i accidentally turned on an auto scrolling setting and to stop it i have to press the home button, but my home button is broken. Am i doomed?

Would it be smart to buy an iPhone X right now?

I've been thinking of upgrading my 7 for weeks now, and it just so happened my phone got stolen yesterday while i was at a coffee shop. A blessing in disguise, i suppose. So what i'm wondering is would it be smart to purchase an x right now or would it just be smarter to wait and get the xr? Money really isn't the problem although saving anything would be lovely.

My iPhone won't connect to Wi-Fi? - 7

Okay so ever since a few days ago my phone has not been able to connect to internet. When I go into settings it says I'm connected but I can't acess Internet and the Wi-Fi thing at the top of the screen isn't there. It's only on my phone tho everything else connects fine. Anyone know a fix?