Can you transfer iphone data to another iphone not store bought?

Was thinking of buying a new iphone since I still have a 6 and it's kinda beat up. If I buy a new iphone from another source like ebay or gazelle is there a way to transfer the iphone data to that device? And if I do transfer do I have t let my cellphone provider know I changed phones?

How do you get into a locked iPhone?

I just found my old iPhone 5c for my boyfriend to use because his phone is f***** so now he doesn't have one. But the phone has a passcode on it and I tried everything i could think of that the password might be and none of them are working. Is there a way I can get into the phone without taking it to the Apple store? If I have to do that I will but it's in the city and I don't go there often. And I can't get on Siri either because for some reason the phone has no service so therefore no internet. The time on the phone is also like totally messed up. I already got locked out twice and I currently am for 5 min. Is there a simple way I can get in to the phone or am I hopeless?

My 4 hour long MP3 won't play onto iphone?

My 4 hour long MP3 won't play onto iphone?

Added (1). I recently burned an audiobook into mp3s and put them into iTunes. They play in iTunes with out a problem, but when they sync over to my iPhone it says "item not available". It is several 4-5 hr long mp3's so that could be the problem. Just wondering if there's any specific reason that this doesn't work.

Why wasn't I allowed to deduct a cell phone that I was required to purchase?

I just need my question answered for future reference. For several months in 2017 I was a so called "independent contractor" and the company I was working for required me to purchase an iPhone. Specifically, they said iPhone and it was on the list of equipment I was required to purchase. The place that just reviewed my taxes said that I wouldn't be allowed to deduct the phone. I dislike cell phones and the only reason I purchased it is because they said I had to. I have a home phone for my personal use, but from what some others have said, it sounds like I might need 2 cell phones to deduct one? They told me they didn't have time to explain it to me right now and to come back after tax season is over if I want tax advise. I was already given the standard deduction on my W2 from my full-time job, does that prevent you from claiming deductions on sideline / independent contractor work?

I don't know if it makes a difference, but I put the phone on a 24 month payment plan, so I'm stuck and still paying for the phone for another year or I will have to pay the early termination fee. I didn't get a personal cell phone because I didn't need it and wouldn't use it.

I'm asking because I'm considering other sideline work where I would be considered self-employed and want to be sure to keep track of deductible items or at least having some deductions to show for. My dad says it looks fishy to the IRS when you report an income of $8,000 but have no deductions.

Camera shutter coming from somewhere that isn't my Iphone?

For the past month or so I've been hearing Iphone camera shutters while I'm sitting in my living room. I live alone and am not taking the photos in order to make that sound ( they usually seem muffled or far away ) Is there any house hold item that could make a similar sound? I'm kinda spooked