Why does my iPhone keep resetting?

I have an iPhone 6s Plus, and I believe the IOS I have is an older one but I'm not sure which one. It's been resetting lately like my phone will just stop playing music and functioning then the screen turns black and it does the white ring thing that usually means something is loading, and then it puts me on my lock screen and I have to put my password or finger print in. Why does it keep doing this? Is it cause my phone isn't updated? Once when this happened all my pictures and text were gone but the pictures ended up coming back but not my messages. Does it have to do with the fact that I have no storage on my phone left? It's just annoying I want to solve this problem. I've asked ppl and they say it's happening to them too. Someone tell me what's wrong please and thank you!

IPhone X or Series 3 Apple Watch?

I need help! Which one should I choose to get? The new iPhone X or the series 3 Apple Watch? I have an iPhone 6 btw. < still in good condition but a bit glitchy

My iPhone 6S volume isn't working

I have IOS 11.0.03. I had to reset my network settings because my phone wasn't connecting to the Wi-Fi. After that I can't change the volume with the toggle when you swipe up. I have to change it by using the volume buttons. Also when I have my ringtone on, it doesn't show how loud it is. It's just blank. I don't know what to do.

4g sim card in 3g phone?

I have a 4g lte iphone with verizon. Would i be able to get a 3g phone from verizon or another carrier and put my 4g sim card in it and have it work normally? I doubt this makes a difference, but the 3g phone i was planning on getting would be a basic phone, not a smart phone. I also know that i would have to get a sim card adapter before even trying this.

Difference between unlocked sim-free phone and unlocked WITH sim?

I already know what unlocked is… I'm just confused about this other thing.
On Apple for example you can buy a sim free phone that is unlocked for full price
BUT
You can also get an unlocked phone WITH (for example) a T-mobile SIM for full price

So my question is, if I get the unlocked iPhone With the T-mobile SIM, can I still use any other GSM SIM card when I travel to other parts of the world to get signal and all? If yes can't I also do that with the sim free phone? I'm confused as to what the difference is… I'm using a GSM network in the US (T-mobile) and also a GSM when I travel to Europe for work (A1 Telekom)… Will I still be able to freely switch SIMs as I do now when I get to Europe and all with the unlocked Tmobile sim iPhone?

Help me win a bet please

Okay, so me and a friend both made this app; it's just a simple arcade; nothing that impressive. So we had a few of our other friends download it, and one of them told us that it was OK but he didn't think we would be able to get a lot of people to download. So the bet is to see if we can get 100 or more downloads in the next month. So if anybody could download it, it would be much appreciated. Thanks in advance.

iPhone link:
https://itunes.apple.com/...42434?mt=8

Android link:
https://play.google.com/...john.dodge

By the way, for anyone interested, the game engine I used to make this was unity.

Why do so many people have iPhones? - 1

I hate iPhones I think they suck. I had one but when I plugged it in one night it shut down and never came back on I didn't do anything to it. We now use Samsung Galaxys I love them. To me Samsung is 10 times better than Apple. But I do love my iPod Touch I never have a problem with it. I'm tired of seeing iPhones. Why do so many people use them?

Accessing Mac photos on iPhone through iCloud?

I'm doing photography edits on my new MacBook Pro & I put the edited photos in the Photos app, which is synced to iCloud. I can see my phone photos on my Mac through the Photos app but I'm not able to see my Mac photos on my iPhone through the Photos app. I figured since the two devices are synced through iCloud, my camera roll in my phone would update when I added photos on my Mac. Is there a way to transfer photos between the two devices theough iCloud?