How to know if iphone is using carrier instead of home Wi-Fi?

Hi, i jsut got my brand new iphone today, first time that i have those touch screen phones so its a big change. However i'm wondering if it is using my phone service wasting money, instead of my Wi-Fi, I have connected to the home Wi-Fi, but i want to amke sure that its using the Wi-Fi and not the 4G

Why I'm I not getting my text messages?

I have a iPhone 5 from t-mobile and I've been noticing these past 2 weeks that I'm not getting my text messages. I can send messages but not receive them. I receive them sometimes but not all the time.
Is it my phone or do I need too go too t-mobile?

Video Star app? Is that best? Or what should i use?

I'm going on holiday with friends over summer, and last year on my family holiday i used the iPhone app 'videostar' to make a sort of collage of videos with a music background - worked really well!

So I'm wondering if there's any other good apps like this, or can i do it after i come back
e.g is there a app for macbook that allows you to combine lots of video clips into a music video after the holiday?

I presume iMovie doesn't do this as i have only ever managed to use some rubbish sample over a few seconds of my video… Or is this wrong?

What is happening to my iphone?

So first, let me begin with what happened. I opened itunes and added the music folder as i always do to update the library with my downloads. And then all of a sudden all the songs duplicate in the library. I don't understand what happened. So i decided to delete all the songs in the library and re-upload them again. When this happened my iphone was already syncing and it got stuck and then it duplicated the songs in the music library. So i went back to the iphone tab on itunes and went to music and unchecked sync so all the songs on the iphone will disappear so i can sync them fresh from the start on the phone. The problem now is this: when i unchecked the "sync music" it only removed half of the number of songs i have.(which means i either delelted the original songs or the duplicated ones) and when i look up on the phone, all the songs are there.(eventhough i just deleted them). And then on the itunes library the songs are not duplicated until i update it with more music and it duplicates again. I don't know what to do. My phones memory is expanding with duplicated songs. Can just anyone tell me what the hell is happening?!

All pictures from Iphones on my computer are rotated?

I have to upload a picture of myself on a website in order to complete my CV, but all the pictures (taken with an Iphone 4S) that I'm uploading are rotated 90 degrees to the left.
I have tried rotating the pictures to different angles both on my Iphone and my computer (Windows 8), but all the pictures on all websites are displayed rotated to the left.

Is there a way for Iphones pictures to look on computer just as they were taken?

I forgot my password on my iphone 5c?

I changed my password on my Iphone 5c and now I can't access my phone! The only way I've heard of getting access back is if I wipe my phone and I really can't do that - is there any way to change my pass code without wiping my phone and without an aplle ID?!

Added (1). Apple*