Problem receiving text messages?

I used to have an iphone and recently got a galaxy s5. When people who have Iphones text me it send as an imessage and I do not review it.

How do I fix this

Free Music Downloads For iPhone 5s?

Is there a site where I can download free new songs for my new iPhone. I used to use tubidy but you can't download from it on iPhone it just plays it… I tunes seems a little expensive so could do with an alternative

IPhone 4S group messaging problems?

My friends are telling me they are sending group messages but I'm only getting some from certain people, I don't understand why. I'm using Version 7.1.1? I'm usually connected to Wi-Fi wherever I go (work, school, at the house), may that be the problem? I send through the regular Messages app

I dropped my Iphone 5, cracked the screen and now part of the screen won't work? - 1

I dropped my iphone 5 and cracked the screen. Then somebody spilt a bit of drink on it and now part of the screen won't work. I can't use the letters I anddm because the screen won't work in that spot.

What do I need to get fixed to fix both of these issues?
If i get the screen replaced will it fix where the screen doesn't work?
Roughly how much will this cost in Australia to get fixed?

Can't download Skype on phone? IPhone?

I installed it months ago and deleted it today accidentally but when I went on AppStore to download it… It said that I need iOS 5 or above. Is there any site where I can use Skype online? >.