I can't hear people on a call?

So i just got my new iphone for christmas and already have problems. I got the iphone 5, i can't hear the other person on the call on speaker, earpiece, or headphones and when i can hear them my phone loses connection out of no where i hear a buzz sound then it hangs up says "searching" then "no service" then i have 4 bars. And it does it all the time. Its annoying. I don't know what to do.

Help my iPhone 5 won't work?

Hi! I went out in the snow and had a snow fight with my brothers and had my iPhone 5 in my pocket and dropped it in the middle of the garden and I didn't realise! I dug up all the pretty snow in the garden and found it the next day so it was out there for 48 hours (we have a huge garden) it won't turn on so I put it in a pot of rice in airing cupboard for almost a day is there any other ways to get it working?

Where on my Computer is my iPhone back up?

I got a new laptop for Christmas, and am trying to back up my iPhone before syncing it to my new iTunes as I don't want to loose anything.
I've backed it up through iTunes but I would like to check the files to make sure they are all there and keep my mind at ease!

On iTunes it says "A full back up of your iPhone will be stored on this computer."
My question, is where? I can't find it anywhere. Where abouts on my computer can I find my iPhone back up files?

Thanks in advance!

Added (1). What's the HDD?
And it's not in iCloud, not only have I already checked there, but you only get 5gb of storage space in iCloud, I have 15gb of stuff on my phone.iTunes also said the files would be stored on my *computer*…

Added (2). Thanks The original Peter G! Only thing is I'm using Windows 8 (forgot to mention) and I'm having major difficulties finding those files in the maze that is Windows 8… :/

My iphone 4 only works abroad

I recently bought a used iphone 4, and i found out it only works abroad, i inserted my vodafone micro sim, as is locked on vodafone, and it says no service? Help, i want it to work in the UK as there's where i live any help will be appreciated thanks

I have an iPhone 5 for AT&T, why did i use all my data (300mb) in about a week?

Okay so i bought my iphone 5 a week ago and 90% of the time i connected it to the Wi-Fi at my house and i just got a notification saying i used my 300mb and i know thats inpossible, what should i do? Doesent the iphone automatically just use the Wi-Fi network and only the Wi-Fi when its connected to it? Please help, i don't wanna give At&t another 20 bucks

IPhone 4 problem. Won't start up?

I got the iPhone 4 yesterday and I'm still waiting for my new sim to arrive. I began to start setting it up and then came up 'We're unable to continue with… '
I was told you could still start your phone up without the sim card so were they wrong or is there something up with the phone?