Can I change Iphone 4 contract sim card to pay as you go whilst I'm abroad?

I'm hoping to go onto an Iphone 4 24 month contract with 02 from next week. However I travel to Egypt a few times a year, is it possible to swap the sim card to a pay as you go 02 just before I go away and then reinsert the contract sim card when I arrive back in the UK to avoid high costs.

I want to know if this mucks anything up on the phone or if it is even possible? I've heard it accepts a micro sim only.

Any help would be much appreciated, thanks.

How to import All photos from iPhone to computer?

On my iPhone 4 running IOS 5.1.1, when I import photos and videos using Windows, only 892 items out of 1, 099 items get transferred. The other 207 items are not currently on my computer at ALL. How can I resolve this, I have run out of space on my phone and need to import the photos As soon as possible.

All answers are appreciated

- Sameer

How to put my music on my itunes library from iphone?

I recently restored my computer and i had to download itunes again.obviously no music was in the library so i thought putting my iphone in the music would go to the library. There's still no music in the library and also i can't transfer new songs to my iphone from itunes. I was going to restore the phone but it says i have to purchase everything again

Are screen protectors necessary?

Cause i wasted $20 on a screen protector for my iphone & it ended getting eff'ed up there were a bunch of bubbles & it just looked horrible! I don't want to get another, can i piece of plastic really protect your screen anyway?

How fast will the iphone 5 sell out?

I'm really excited about the iphone 5, i'm still using a flip phone from 2008. I want to purchase it on the date it comes out, sept 12. Do you think people will be camping out for the phone? And if so how fast will it sell out? Also if they do sell out will they get more the next day? Or how long will it take for them to get the phone?

Facebook won't upload photos from my iPhone 4s?

I've been able to do it just fine in the past, but now whenever I try to upload a picture, the whole bar loads and then goes away, leaving the upload screen still on as if I never clicked "upload." I'm not getting any messages saying it's unable to upload or anything.