IPhone 4 SIM lock for unknown carrier?

Someone gave me their old iPhone 4. I used a utility to install iOS 7 on it, but it wouldn't turn on without a SIM card. So I put my SIM card (valid O2 SIM) in and started through the process. I get to a "SIM Locked" screen and that's it. I'd rather not jailbreak the phone as the only reason I want to use it is for testing apps and websites in an authentic iOS environment. Can I unlock the phone by going to O2 or by doing something myself? I've seen tutorials online that cost a bit of money (no problem) but I need to know the current carrier and IEMI number (which I can't get at because I can't even get to the keypad).

Any suggestions?

Exchanging a Note 4 for an iPhone 6 Plus at Best Buy?

I was recently given the Note 4 as a gift, and I know it was purchased at Best Buy about two weeks ago (luckily, it was the day after their holiday return policy started, so I believe I can return until sometime in January) and as much as I do love the phone, I'm looking to exchange it for the iPhone 6 Plus.

Does Best Buy charge a fee for exchanging phones, and do I need the credit card used to purchase the phone to make an exchange (even if I have the receipt)? Basically, how exactly would I go about exchanging the phone?

Lost COC acct on GameCenter?

I already had an account on my iPhone and I wanted to put my 2nd base on my iphone. So I followed the thread, restored my phone, made a new gamecenter account and linked my account from my android device to my new game center. Then I restored backup and was able to switch between both accounts as normal as people are able to do on android device.

Things were fine for about a day or so. I logged out of my main acct and logged into my second acct. This time it ddnt ask me to confirm the switch and loaded up my main base on my second gamecenter acct. I went through the forums and uninstalled COC, logged out of gamecenter and Facebook, restarted phone, logged back into game center with the acct associated with my second base, reinstalled COC started it up and my main base was on both game centers still.

So then I restored phone back to factory settings and did process all over again. Still nothing. I then thought I can make another gamecenter and transfer account again. I can't. I thought I would be able to transfer account to another Google+ account as well but it you can only be on one. I sent email about problem to SC but i be heard it takes a while. I really want both accounts on iPhone as I rarely use my android tablet anymore. Please someone help me please?

I won an iPhone 5 just for taking a survey. Is this a scam?

I typed in goggle.com out of curiosity and I took a quick survey and it said I won one of 3 items and I chose an iPhone 5, now the website is asking me for my street address. Are websites that say they're giving away electronics for free a scam? Should I give away my street address? What will happen if I do it?

Can find my iPhone be fooled?

My parents use "find my iPhone" to track where I'm at every time I go out. They don't need to know where I'm at all the time and certain times I'd like to be able to fool the app. If I deleted it or shut it up they'd be notified and would notice, is there any way I can set a location that will come up as where I'm even if I'm not? I just got an iPhone 6+ so I'm not really trying to jailbreak, but if there's a jailbreak way I'd still like to know