How to download old version o iPhone apps?

I have a phone 3G and I want to download kik from the app store but it won't let me because I need iOS version 4.3 and I only have 4.2.3 and my iPhone is so old that that is the newest version. So how do I download a older version of kik on my iPhone? P. S. I've tried installous but kik isn't in there

How to activate a second hand AT&T iphone 4s with Tmobile?

So I bought a used Iphone 4s on ebay. I got it today and it said I need to activate it. I have Tmobile as a carrier so I don't have an AT&T account nor AT&T sim card.
How do I activate the iphone? I just want to activate it so I can factory unlocked it.

Should I go to the AT&T store and ask for a sim card even though I'm not a customer? Can anyone give me some advice?

Water damaged iphone (insurance claim)?

I filed a claim with Asurion through verizon, I was required to pay 169$ for a replacement phone.

the problem is that troubles me is that the only problem with the phone is that after it dropped in the water, the screen has a drip mark that won't go away, it won't turn off and there are some tones that don't play.other than that it works fine.

what I'm asking is if the claim is still legitamate. It's still noticeable damage, but is it claim worthy noticeable damage?

Does the iPhone 5 have a laser keyboard? - 1

A little while back i saw a trailer on youtube and it showed the 'iPhone 5' with a projector keyboard and i thought it was fake. I was talking to my friend at work about it today, does the iPhone actually have that? Sorry if i sound stupid

Why is sprint signal so bad in Louisiana?

I have the iphone 5 and its carrier is sprint. The signal is always 1-3 bars & it's 3g. I'm wondering if it's the rain thats making it slow or does sprint suck in general.

Iphone receiving imessage from andriod phone?

My friend has a samsung s3, and i have an iphone 4. When we were texting I realized that it was sending as imessage, and she was receiving it as imessage as well. Is this normal? Do I have to be concerned with having a higher bill or anything of that sort?

VERIZON WIRELESS or AT&T- which is better?

I'm buying an iPhone.
I've had VZW for the past 6ish years. But AT&T is slightly cheaper.
so, AT&T people.tell me how you feel!
should i switch and leave VZW behind?
or tell me why the extra money at VZW is worth it!

Added (1). Tell me everything: the good, the bad, and the ugly!