My iPhone 4 call volume is really low, what should be done?

I have a 2 month old iPhone 4, and all the sudden during a phone call (don't call to much, but starting to a little more) it went down Really low. It's on maximum, but it seems like it's on minimum. My friend suggested taking it to Apple, but my Dad won't be happy, for this is my first phone, and I've only had it for 2 months. Is there another way I can change it so I don't have to get a whole new phone?

Should I return my iPhone and get my money back?

I got an iPhone 4s from cricket which includes no contract so it was VERY expensive. And everything works well except it plays videos very slow sometimes. (like YouTube) and the iTunes works very slow as well (the 3G sign goes off most of the time when it's loading something).So I'm not really satisfied cause of that. Since today it's the 28th day with it and I can still return it. What do you all think? Should I get my money back?

Iphone gets very hot when charging and battery dies fast?

I took it to Apple and the associate told me that the battery is fine and said I needed to restore my phone back to factory settings. I did restore it and of course, it did not work. That wasn't very helpful. It's still getting hot when I charge it and as soon as I take it off the charger it loses battery very fast. Within an hour I'm back at 2% battery life. Does anyone know what else the problem could be?

Bluetooth connection problems?

I have a mytouch 4G slide for tmobile. My friend has a iphone 4 and he really wants these songs i got but our bluetooths are like mortal enemies. It will say i'm paired with him but not connected. And when i do send the file his phone saids not compatible and mine saids target is forbidden to receive the file. Is there any possible way i can transfer the music?

None of the apps on my iPhone are downloading anymore?

I have an iPhone 4s and none of my apps will download or when i try to update the ones I already have, they don't load either. It just keeps giving me a message that says "Unable to Download Application. (whatever app I'm trying to download) could not be downloaded at this time." I have tried shutting my phone off many times and even deleting apps to make sure I don't have too much. Not sure what else I can do.

IPhone App Store not working? Unable to download?

It says updates are available but when I try and download them they all say that they're loading, then clear, and then say "Waiting" and then an error message pops up saying "Unable to Download Application" and to retry. I hit retry and it does the same thing all over again.

I've logged off and then back on, and turned my phone on and off and it still won't work.

Is it just me? Or any suggestions?

Should I change my iphone 4 to an android phone?

I have my jailbroken iphone 4 (about 3 months now).
And I'm not happy about it!
I have a sony ericcson experia X8 and got fruit ninja on it, I enjoyed it ( it is free)
I installed fruit ninja on my iphone and there was no arcade mode (in the full version there was which costs 99c) And don't say "buy an itunes card" beacause Its a waist of money (for me!)
I'm really unhappy that I bought an iphone 4!
I'm thinking should I change my iphone 4 to an android phone. Please give a list of pros and cons. Thanks!
And could you give a list of cheap android 4.1 phones. I'm with o2 in Ireland and can't sign
Contracts.

P.s. If i wanted to sell my iphone and my xperia x8 how much would i get in euros.

Please reply!

Denon AVR-1913 vs Yamaha RX-V673?

My current receiver is burnt out which was Harman Kardon avr247 (simply great sound).
Now I'm looking for new one, after several week of search I have found these two as my choice within my budget.
but i'm not sure which one should i buy?
I heard denon has its own discrete circuite however, yamaha doesn't have this feature and it have integrated circuite. On other side, Yamahs's iphone app is lot batter than denons.
My first choice is Sound & realibility. Second choice is wirelessely operation thru iphone.

ICloud is not working on iPhone?

I have all the settings turned on for iCloud to be working but still if I take a pic or download a song from iTunes nothing gets sent to my Mac unless I plug in my phone. I went into account settings in iTunes and it only shows that my MacBook is authorized. I need to authorize my iPhone but there's no option to add a device. Does anyone know how I can add a new device to my iTunes?