No 3G reception when making phone calls
I have issues with my Iphone 4. I've noticed that whenever I recieve phone calls I do not have 3G reception. Just wondering is this a normal thing for all Iphones? Cos my previous Iphone 3G have this same issue as well, I thought that it's due to older model hence there isn't 3G reception when making phone calls. Can anyone here please enlighten me? Thank you.
iPhone 4, iOS 5