IPhone switching to landscape mode after exiting apps?

Hope everyone is well. I have had my iPhone 6s Plus for a while now, however, a problem which has persisted is that randomly, after exiting an application and closing it from multitask, my phone switches to landscape mode and back to portrait mode, even though I'm holding my phone in portrait the entire time. This happens randomly and the orientation just flips to landscape mode without my even tilting the device, and then it goes right back to portrait mode. Does anyone else have this issue? I have restarted my phone many times, and I have also updated it with the new softwares; none of these seem to help. Any ideas?

My iPhone won't send iMessages

For some reason my iMessage won't work with some people. It will just send as a regular text message even though the other person is using iMessage and I have iMessage enabled on my phone. Anyone know how to fix this?

I'm having audio problems with my Iphone 6 S?

I can't hear the little clicks when I type, and also I can't hear the ringer when someone calls me. Everything is on when I go to the sound settings but it's just not working. I've tried restarting my phone. I've tried resetting my phone.

It's done this countless other times but the sound usually randomly comes back in like maybe 3 days. It's been a whole 2 weeks this time.

Does anyone else have this issue with their iPhone 6? I'm tired of missing phone calls because I can't hear it. Like i've said, I've tried everything, everything on the sound settings are on and should be working but it's not.

Added (1). Would also like to point out that I have no issues with the sound when I watch youtube videos and stuff like that. Also, i have no problems with the alarm going off, thank god.

Added (2). Would also like to point out that I have no issues with the sound when I watch youtube videos and stuff like that. Also, i have no problems with the alarm going off, thank god.

Can anything other than the person themselves turn off their location sharing?

I share my iPhone location with my girlfriend (obviously she does with me also) but when I Looked earlier it kept saying "location unavailable." so when I asked she went and turned the share location back on and said that Instagram probably turned it off whenever she didn't want it to know her location.

So I guess I'm just wondering if any third party applications can do that or if it has to be done manually

Does Snapchat Spectacles use iphone data?

I'm ordering Snapchat Spectacles. They connect to your phone via Bluetooth. I want to take them with me to an amusement park and take some pretty cool photos, but I'm afraid it would use data. I'm pretty sure the park does not offer Wi-Fi, so if I use them, will my iPhone data be used? Please answer, sooner the better.