How to install an application from computer to an iphone?

I just would like to ask how to install an application from computer to an iphone, i don't have an icloud, my iphone was just given to me by my mom who is in japan, i'm currently in the philippines and i'm just using and r-sim to activate the phone here. So i reformated the iphone and when i was a about to make an icloudof my onw, it says something like there should only be one icloud per iphone, so i oped to use my mom's icloud, however, it says, it has already been deleted (by softbank maybe, her netwrok rpover in japan) so right now, my i hpne is only used for texting, calling, browsing the net and as a camera, i can't install applications, is there anyways you can teach me how to install application from computer to my iphone? Please,

ps: i don't have a mac, only windows computer

Is Apple going to recall iPhone 6 because of internal battery leak and combustion issue?

This article on Oct. 28th, 2014 says Apple is quietly preparing for most expensive product recall in the company's history because of:
1. Internal battery charging interface design error that reduces charge up to 55% within 6 mos.
2. Critical battery degradation/failure leading to risk of device combustion.

My friends who bought the iPhone 6 have complained about other items like the 8.0.2 oops! & people can't hear them and upside-down photo issues… But this sounds like a major blunder.
Will this happen? If so, is Apple on a downward spiral? Article link below:

http://nationalreport.net/iphone-6-facing-massive-recall/

What problems are you finding with your iPhone 6 & 6 plus?

1. Some are saying the iPhone bending is just a hoax. Friction, pressure and or sitting in tight pants, etc it's been reported. Has this happened to you?
2. Only one speaker on right, lower and I had a hard time hearing my friend who just received her iPhone 6.
3. My other friend has trouble taking photos. After taking shot the pic and entire facing page is upside-down. IPhone support keeps telling him to reset and it works again but starts doing it again after a few days.
4. Poor connectivity, another acquaintance tells me she's with AT&T and never had dropped calls w/her other iPhone 5, now it happens all the time even though she set it for the nearest tower three times so far.
What problems have you experienced if any and do you think this product was released too soon?

Unlocking Iphone 5s Us Cellular?

Unlocking Iphone 5s Us Cellular?

Added (1). I'm buying an iphone 5s from a friend. He has Us Cellular. Now if i buy this, will i be able to switch it to a different carrier with a new sim card?

When A Girl Looks Away Quickly?

Two week ago she Looked Away Quicky When I Turned in her direction in class. Could she just have drifted off? Also my iPhone has a very unique case and was on the table and she was sitting behind so she could have been looking at that.

She is a very attractive girl and I wouldn't say I'm that attractive.Last week I think I saw her looking at me in the corner of my eye.