Does replacing the iPhone screen void the warranty?

I recently cracked my iPhone 4s screen and got it repaired by a third party company (so not Apple). Just now I figured out that whenever I record video or use Facetime, all I hear is annoying static. I want to take it to the Apple store since my warranty isn't up yet, but I heard that if you take the back of the phone off, the warranty is void. Is that true?

IPhone 5 won't charge at all?

My iPhone 5 has randomly stopped charging… Never had any sort of issue with it before, just plugged it in as usual and it will not charge.
When I plug it in and it comes up with the picture on the right:
image

So confused as to what this means and I can't seem to find an answer online although I did see someone say that indicates that the battery is completely gone… I really hope this isn't the case as I can't afford to replace the battery at all right now and I need my phone to work urgently.

Has anybody had this problem before? Should I try buying a new USB? Thanks

Added (1). I have tried plugging it in my laptop but still nothing.

How to take someone off my Sprint data plan?

When I first bought my iphone I was on an individual plan about a week later my mom bought herself an iPhone and wanted to get on my plan. Long story short, my phone bill is almost $300 every month! I'm friggin 19 years old and it's annoying. Can I take her off of my plan? Will there be a fee? I don't want to cut her phone off, just take her off my plan and put her on her own

Cellular Data Network Iphone

So i have an Iphone and my step dad turned off the cellular data network. I can't get internet without Wi-Fi. And it is getting really ignoring. So how do i turn back on the 3G internet so i can connect places without Wi-Fi.

I gave my husband my old iphone and now my texts and emails go to my phone and his?

I don't even know what this is called so googling the answer is impossible. I've tried 'pairing' and 'linking' but to no avail. Do you know what it's called and how I can stop it please?

Added (1). Just to be clear, I bought myself a new iphone 4S and his is a 3GS

Added (2). And this is a new problem, they were working independently fine until 24 hours ago. I have to say my husband isn't the most techy minded (says me!) and would have just pressed ok to anything that came up on the screen.

My iPhone 5 charger just stopped working?

I've had the iPhone five since Feb. 12th and it's been perfect. I always charge my phone when I go to sleep and I did the same last night. I woke up and my phone only charged up to 98%.So, being the weirdo that I'm, thinking 2% would matter, so I plugged into the charger again and it didn't do anything. So then I unplugged it, blew on it a little and tried again. Then I tried it in two different out lets.

Finally I had to actually go to school. In 7th period I pluged my cord into the computer and it still didn't work!

I did everything below:
-Reset it
-Computer
-Turned it off and then plugged it in (And the phone turned on when I did this it just doesn't charge)

WHAT DO I DO!

Can't unlock iphone without it reading text message?

I Can't unlock my iPhone 5 without it reading the text message that has come up? I don't want too have to read the text to unlock my phone? Any settings i can change so i can unlock the phone without it reading the text?

Buy an iphone 5 or wait til iphone 6 or galaxy s4?

I've owned both before, I've owned an iphone 1 and 3g and also a galaxy s2. I really dislike how my s2 has so many bugs and i'm planning on getting a new phone in the future. Should I buy a used iphone 5, wait for the iphone 6 or galaxy s4?