How to switch from iTunes stores?

I accidental changed stores from Ireland iTunes Store to the uk one on my iPhone, I don't know how to change back to the irish one as it won't let me download apps now, thanks

Anywhere to watch/ buy / download project x online?

For a while now i've been really wanting to watch project x, the one that came out in 2011. I don't have a dvd player set up so i can't go rent it. I don't have a laptop either all i have is my iphone.i've checked on itunes and you can't get it on there and i've checked on amazon instant video. Is there anywhere i could pay to rent/buy it online for my phone? Or watch it for free?

How to get to 30, 000 meters in Jetpack Joyride?

I've been playing for like a week now and I'm lucky to get to 3000 meters I keep hearing people say after 1 day they were able to get to 10, 000 how is that even possible you wolud have to be superhuman to get that far or extremely lucky what am I doing wrong do I just have to buy a 1, 000, 000 coins I don't know if this makes a difference but I'm playing on the iPhone 4 maybe it's easier on the iPad

Using a Chi and iPhone charger in Cuba?

I'm from Canada and am going to Cuba next weekend. I went to buy an adapter in store the other day and they said Cuban outlets should work fine with North American items.

On my resort website it says the "voltage is 240 (adapter required)." So I'm guessing that means I do indeed need an adapter but then I'm also reading conflicting things.

I will only want to use my Chi hair straightener which says 300V on the cord and my iPhone 3 GS which says Input: 100-240V on the charger cord. Do you know if either/both will require an adapter to work in Cuba?

How to fix my iphone 5 speaker?

Yea well this is going to sound so stupid but I was sitting next to my little brother and he was eating, he grabbed my phone off me and it slid down onto his place right into tomato sauce.
I managed to get it out the charger and earphone bit but my speakers are dead crackly and not as near as loud as they used to be.
there's screws next to the speaker so would this open it up? It's the speaker at the bottom at either side of the charger slot.
shall I take it to the apple store? If so how much would this cost?