Use My Iphone Internationally?

I have an Iphone 4s running IOS 7. My family and I are going to Europe for two weeks and I'd like to bring my phone with me so I can take pictures and keep in touch with my friends, HOWEVER I don't want any international charges for texting, data, etc. I want to bring it around with me to take pictured but ONLY would like to use it to text and use data when I'm on hotel Wi-Fi. Is there a way I can do this so I don't get charged?

Which water proof case is better for my iphone 5s? - 1

Which water proof case is better for my iphone 5s?
i'm going to the river in a few weeks and i wanted to buy a good water proof case for my iphone. I found the two i wanted but only want one. Can someone tell me which one is better or if they the same?

OtterBox Armor Series Waterproof Case for iPhone® 5 -

or

Incipio Atlas Waterproof Case for iPhone® 5 & 5S -

please i need more answers then one.

Iphone 4s not being recognized by computer, how do I fix it?

Iphone 4s not being recognized by computer, how do I fix it?

Added (1). When I plug my iphone in, it can't be found and I'm trying to sync music from itunes. When I troubeshooted my iphone it said that my iphone was an old device and may not work with USB 3.0. But this is the first time this has happened, my USB stuff has always worked. And whenever I plug my iphone in it asks me if I trust this computer, which I always say yes to but nothing happens. Please someone help me!

IPhone 4 won't go past Apple Logo?

I was on my phone watching YouTube and I got tired so I plugged my phone in and went to sleep. I woke up the next day and my phone was on the apple logo as it was plugged in. When I unplugged it the screen would just go black. I would plug it back in and it would boot up to the logo and never go off of it. The bad thing is is that I don't have a home button so I can't restart my phone. I don't know if it is my battery or the IOS crashed. I need help please.

Iphone 5 in washing machine?

My iPhone 5 was accidentally put in the washing machine for 1 hour (hot soapy water & a really harsh spin cycle), luckily it came out without a scratch, but it wouldn't turn on. And after sitting in rice overnight its still not working.
should i wait longer or just get a new phone?