No service message on iPhone while abroad?

I'm on Orange in the UK, and have arrived in America today however I can't get any service on my iPhone 4, I have tried turning it off and on again, manually choosing the service but it can't connect, as well as reseting the network settings but it's still not working. My friend is on Vodafone and hers came up automatically when she switched her phone back on after the flight… Has anyone got any ideas on how to get mine to work?

Do iPhone app developers steal ideas from android?

I'm developing an app solely on the Android and was wondering, if my app gets successful, will there be rips offs on the apple store. Or would it be a good idea to let a developer develop it for me on the iPhone after I finish the android version?

Can i make any claims against repair man?

I took my iphone to repair store to have the top button replaced (it's out of warranty so apple wouldn't help me). He did that perfectly but in the process screwed up the camera which now can't be used and the side of my screen barely responds to touch.
It took him 3 or 4 goes at trying to fix it for me with no avail but now claims it's not his fault and i must have ruined it myself. I finally just said stop tampering with it and i'll take it home, still got charged a pretty high fee for it, before he would hand it over.

I have a receipt, but i was just wondering if i would be able to make a claim for the money back or for some kind of compensation for an iphone i now can't use?

And if so, how would i go about this?
(In Australia, if that makes a difference)

*Sorry if this isn't the right category, it was a toss up.

Can i put my iPhone in the microwave?

Ok so i heard thst if you have bed bugs you can put your phoen into the microwave for 20 seconds ad it will kill them does it work should i do it?

Will iOS 7 Beta upgrade to full ios 7 when it's released?

I wanna upgrade to ios 7 beta, but when ios 7 is released in the fall, will the beta upgrade straight to the full ios 7, or will I have to restore my phone back to ios 6.1.3 (or 6.1.4 for iphone 5) to upgrade to the full ios 7?