Restoring a new iphone from an older backup?

My mom just got the iphone 6s and her old one was a 5s i believe. I did a backup of the old phone, and now trying to up that on the new phone. When I first tried it said it can't be restored because the software on the iphone is too old. (to restore this iphone from this backup, you just first set up a new iphone and restore the software to the lastest version.) So i started a new iphone and when i click the restore back up the one i need isn't there. But when i go to preferences I can see the backup i need so it does exist. I don't know what it wants me to do. Am I suppose to update the old iphone and then back it up? I'm not even sure if it has a new update. And we don't even have icloud set up but if anything i guess thats the next option.

My iPhone 6+ isn't responding anymore?

So recently my phone has had this grey flickering bar at the top of the screen, at first i thought it was a bug with the new ios 9 I installed so I downgraded, reset my phone and did the whole process, after like 2 hours later my phone started doing it again, so I pressed the home button and the power off button and i did that process to and it doesn't seem to go away, after like 2 weeks of it happening it became constant and it really annoys me now, I accidentally dropped my phone and it shattered and now the grey bar is repeatedly happening, so I was wondering, is it really worth the money to repair the screen if the grey are is just going to keep happening? I don't want to waste $200 for a new screen when I can get a new phone, but should i get the screen replaced?

I want to sell my iphone 5, how do I go about doing this?

I want to sell my iphone 5 at a store near my school. Is there a certain age limit required when doing these things (I'm 14.5) also, do we need to sign any papers or fill our any forms? How much money could I get for y mid-condition device? It's unactivated but only requires a sim card. I like in the US.

Deleted Profile on iPhone 5s?

Deleted Profile on iPhone 5s? - 1

Added (1). After getting my StraightTalk account, i got messages saying i will need to have the latest iOS version to receive my updated APN settings. Then another message saying ill have to delete any existing profile before updating to the latest iOS but going to settings, general, profile, tracfone.vzwentp then delete. I deleted the profile but now i'm not able to get on the internet without Wi-Fi. I get text messages and calls but without Wi-Fi, i can't get on the internet. What am i supposed to do?

Is my iPhone 6 locked or unlocked?

I'm trying to sell my iPhone 6 and someone asked me whether it was locked or unlocked. Not sure what that means.

I bought it on the official Apple site, but with a T-mobile sim already inside. There's no contract, because I purchased it in full.