Should I change my iPhone battery or replace the phone?

I have a iPhone 6 I bought off of amazon that works perfectly fine, except no matter how much I charge it the phone shut off and says it needs battery which I know isn't right because I charge it. My first thought was that it's the phone's battery that needs to be replaced so checked a local repair shop and it costs $50 dollars to change it in 16 minutes. Do you think it's the battery or something more. Everything else is functional, audio, charging port, buttons, screen, camera. It just won't hold a charge and turns on and off suddenly for no reason at all. Should I send it back or get it fixed up?

Why does an IPhone sound like a Minecraft door when you close it?

I usually don't have my ringer on on my IPhone X but recently I turned it on during my spring break and realized when you closed an IPhone it sounds like when you close a door and Minecraft. This now brings up more questions such as who did it first and does apple or Minecraft have to pay a royalty every time that sound is made by their product?

Is My Old Phone F**Ked?

I was just wondering if anyone knew if I could still recover the data from my old Iphone 5 if i took it too a professional. The problem with the phone is that the battery expanded and slightly cracked the, what i think is a motherboard of the phone and now the phone doesn't turn on. If anyone knows anything about old iPhone and fixing them please let me know before i spend alot of money for someone to Try and fix it.

How to not make it so the person calling me doesn't know I blocked them?

I own an iPhone. I'm a Pizza Delivery Driver and my boss is batshoot crazy. She keeps calling me when I'm on the road delivering pizza which of course it's dangerous and illegal to talk on the phone so I would block her.

Problem is, it's too obvious that I block her, because she would hear a ring once and it goes to voicemail. Because of this, she knows I blocked her so when I arrive at the store, she would scream my head off to not block her and that if I keep doing that, she's going to lower my hours because she needs to know where her drivers are.

It's not just her. Sometimes my mom will keep calling me when I'm driving as well or in the middle of the night, so there are times when I block her. But again, she knows because it goes to 1 ring and goes to voicemail instead of the usual 5 rings and goes to voicemail.

How can I make it so that the people calling me that I blocked, would hear 3 to 5 rings and then goes to voicemail so it's not so obvious.