How to put on an iPhone screen protector?

I need to get an iPhone screen protector because i just got my screen fixed and i want to prevent it from getting cracked again, i have a phone cover as well and I'm afraid that will raise the edges of the protector and make it go all bubbly. Is there any way to avoid this, or will i just have to deal with it being like that?

Will at&t charge me to change my sim card?

I have an iphone 5, and me and my friend are trading iphone 5 for galaxy note 2, they both require different size sim cards, if we go to at&t will they swap out the sims for free? If not, what's the fee

Can I use the Verizon Iphone 5 in Europe just for internet?

I'm going on a trip for 2 weeks… Specifically London, Paris, Brussels and Amsterdam. I have a verizon iphone 5 and need it for internet access to make the trip smoother, but I do NOT need it for making phone calls or texting.
Do I even need a SIM card to use the internet in the various countries, or could I just use the free Wi-Fi at different places (which is what I want to do)?
Should I just call up Verizon to let them know I'm going to Europe but don't need any sort of phone package? I just don't want a massive bill of like $2, 000 when I get home!

What apps uses most data on Iphone?

Like which ones in general? I only have a little bit of data and still have a week to go but what apps use up the most data? Tumblr, twitter, safari, games, youtube, netflix, facebook, etc… And also, when your at home and have Wi-Fi, does it use your data up or does it stay the same?

Problems unlocking iPhone 4?

So my mom upgraded to the iPhone 4s and gave me her iPhone 4. She is with the mobile network Vodafone, and I'm with Meteor. So I put my sim into her phone and it said not accesible, so the meteor people said you need to call vodafone and get the unlock code.So, we called Vodafone! They told my mom to put her Vodafone pin back into the iPhone 4 and call * #06#. She did that and the big long unlocking code came up.So, I took out her sim and put my meteor sim back in, expecting the phone to ask me for the unlocking code. Instead, it just said sim locked and requested my pin code. I put in my pin code and that was fine. So the phone is unlocked, my sim is in there, but it says no service and I can't make calls? Its basically acting as if there's no sim in there. Can someone please help! I need my meteor sim to work in the iPhone 4!

Restore iPhone 4S iOS 6.1.2 Redsn0w?

I'm trying to restore my iPhone 4S on redsn0w without updating to iOS 6.1.3. I want to know if there's any difference between the iPhone 4S 6.1.2 baseband/modem firmware is diffrent from the one on iOS 6.1.3. I'm using a Gevey Ultra S on my iPhone now. I don't want to lose that functionality of having my iPhone unlocked.

Can you downgrade an iPhone that is not jailbroken?

I have an iPhone 4, on ios 6.1.3, I want to downgrade it to 5.1.1 because I want to jailbreak it, iTunes keepts doing error 3194 or something and I've done everything to try and fix it but it won't work when I try and downgrade it on that. Is there anyway I can downgrade it to 5.1.1 without iTunes?