IPhone 4 new model help!

[Zanghfei]

I've changed my Iphone 4 (old model and broken screen) to Iphone 4 (New model) not S lol.
3 days laters, I call my home using my Iphone.
I can hear them, but they can't hear me.

My Iphone doesn't set as mute.
I try to put it in speaker mode and it doesn't work
I've try several fix in apple forum and it doesn't work.
I did *double-click home button* and delete all active application and it doesn't work.
Reboot? and it doesn't work.
Almost anything is doesn't work!

There's any way to fix it? Or it is the cellular signal?
Bring me back my old Iphone model!

(Lol)
P.S. it doesn't work lol

[Moxus]

If you have a good backup of the phone, wipe it and restore the factory settings. If it's having problems after that, you have a fundamental problem.

-=Moxus=-

[Zanghfei]

@moxus
Well, I do restore my Iphone is work for the frist time and meanwhile.... It doesn't work :\
Which is lame. Tomorrow or I don't know when, I going to apple store and talk it about.

[Smythe]

@moxus
Well, I do restore my Iphone is work for the frist time and meanwhile.... It doesn't work :\
Which is lame. Tomorrow or I don't know when, I going to apple store and talk it about.

Good idea, we literally have no idea how to Apple here.
But yeah that's probably the best course of action