What are the reasons on how a app can crash and how do you fix it?

I really want to know how does a an iphone app can crash. Like what causes a app to crash and how can you fix it or do you have to wait until there's an update for the app. How can a app crash. Please give the number of reasons for a app to crash. The most important thing how can you fix the problem. Can an app crash if you did not upgrade to the an new software like ios 7. I want to know how can you fix it.

You see I updated my instragtem app last Wednesday by mistake I did not wanted to update but on it said this an earror I DO NOT KNOW HOW TO SPELL THIS. So I deleted the whole app and then purchased it again so that that problem will go away. But when I got the app back then it updated it by it self I also want to know what will happen if someone did not like an app. Can they some how get the old version back or do they just have to deal with and just wait for the next update.

If you all can help me with these questions it will help a lot I hope.

Added (1). Can you still get the update on ios 6 even trough you have not updated to the new software.

I have an iPhone 4S but I want to upgrade?

I have a iPhone 4S from verizon that I got May of 2012. I want to upgrade to the 5s. But I'm not eligible for an upgrade till may of '14. Does anyone work for Verizon know the price to just upgrade even though I'm not eligible for it?

How to restore my jailbroken iphone 4?

My iphone 4 is jailbroken but it is semi tethered meaning that i used a 6.0 ipsw with redsnow because at the current time, there was no jailbreak for 6.1.3 so i used the 6.0 ipsw. But now i want the ios 7 without the jailbreak cause i don't want it anymore. So can someone tell me how i can restore my phone back to 6.1.3 or even go straight to ios 7? I tried connecting my iphone to itunes and restore it but it gave me an error message everytime and the same thing with updating it. I really don't care about the jailbreak if its gone in the process. Infact i prefer it not to be jailbroken.

I lost my iPhone, How do I find out my serial number?

I'm trying to report my iphone stolen and the police is asking me for the serial number. I don't i have my S/n but i did provide them with my IMEI number but they said they can't take action without my Serial number which i've never backed up on my computer but it shows up on my iTunes Manage devices list (Photo is below)

What should i do from here, My phone service can't provide me the number and I don't know where my iPhone 4S box is located?

[IMG]image…

Added (1). I lost my iPhone, How do I find out my serial number

Iphone completely dead.after faulty charging dock?

My iphone charging was rapidly flipping between on and off, and it wouldnt charge. And i took it to the apple store, they said it was the charging dock. So i have left it plugged in for a couple of hours, and it stored about 5% power and worked for a bit, then powered down.

Before, it said for about 2 days, it needs to be plugged in to charge, Now, it doesn't even show that, it's completely dead…

… Is there any chance that i have completely wrecked my iphone by keeping it on charge when the charging dock is faulty

Does it pay up to buy an repair damaged iPhone 5?

I'm interested in buying iPhone 5 that's WATER DAMAGED or has broken screen, and than repairing it. I want to know is it posible and does it pay up to repair Water damaged iPhone 5. I'm quite experienced in repairing electronics, I just never did repair any iDevice.

Can you delete websites individually on the iphone 4s?

I'm worried that my boyfriend goes on websites that I don't like. He promises and swears he doesn't go on them. He doesn't have a laptop or computer or anything. He has his iphone 4s. I delete his history everyday at the end of the day, but i feel like he deletes the websites he doesn't want me to see and leaves the rest. So my question is, is there a way to individually delete websites or do you really have to clear it all?

IPhone 4S not detecting Wi-Fi signals?

My iPhone 4S just stopped all of a sudden picking up Wi-Fi signals. It won't show any signals in the area and when I type in the name of my Wi-Fi it says there's no such signal. My wife's I phone picks up our signal and shows other signals in the area. What is wrong and what can I do? Someone told me its the transmitter receiver in my phone and not a setting or password issue.

Added (1). Tried that fatefing

Can I switch my Verizon iPhone 5 add on to a Sprint plan?

So about a year ago my boyfriend put me on is Verizon plan with an iPhone 5 so I only have to pay $40 a month. Well, we broke up and he wants me off his line but I don't want to pay like $100 a month. My brother has an iPhone on a Sprint carrier and he said I could add my line to his so I wouldn't have to pay as much. Is there anyway I can take my Verizon iPhone 5 and put it on Sprint? I'm not sure how it works. Any help would be extremely appreciated.

Can you buy an iphone 5s (tmobile) without a contract plan?

I want to buy an iPhone 5s, tmobile, but without a tmobile contract or number, is that possible? Or Do I have to get a mobile plan to come with the iphone?

Added (1). For the full price*

Added (2). I want to get the phone for my sister, in Europe, so I don't need a contract.