IPhone 4 & 5 slot cards

Can an iPhone 4 SIM Card Slot, fit into iPhone 5? Is the iPhone 4 slot different then the iPhone 5?! What's the differences?

My iPhone is bricked and says its in dfu soft?

I tried turning on my iPhone yesterday and nothing happened so i plugged it into my computer where it said i needed to restore it but whenever i try it tells me that an error occurred so i updated both my computer and iTunes but it still doesn't work so i tried recboot redsnow tiny umbrella and some other apps and nothing has worked please let me know if you can help me cause i really need my phone

Added (1). Its the iPhone 4s

Is there anything giving away free iPhones without doing anything?

I was wondering if there was any site that's legit that gives you a free iphone and not the points sites cuz they only give very few points for each offers an I don't want to complete offers cuz they cost money and not those referral or sites that download apps and games or surveys I want something that gives you an iphone by just putting in info

Mobile Phone Carriers: T-Mobile or Sprint with the new iphone 6?

Mobile Phone Carriers: T-Mobile or Sprint with the new iphone 6?

Added (1). I'm getting the new iphone and i'm leaving at&t because they are too money hungry…

Added (2). T-Mobile seems to have been getting better through the years, but they are partnered with metro pcs which scares me…

Sprint has also been on the decline as they are competing with T-Mobile…
Which would you recommend because i'm leaving at&t regardless…

Why is my iphone 4s so quiet?

I used to always be able to turn on the fan, turn on the shower, and put ky music on maximum volume, and still be able to hear it while showering, but i couldnt today. So after my shower when everything was off i could barely hear the music, even on full volume. I also tried to listen to music through youtube, and couldnt hear it through there either, so it isn't just my music. Also i asked my dad to play the same song through his phone while on full volume and his was 10x louder. So i'm guessing its my speakers, what should i do?