IPhone 3GS crashes when I go to text?

Iv had the phone for a year now and it's worked grate. But today I had 2 text waiting and every time I hit my messages button it goes white then crashes back to the main screen. Iv try's going into my contacts and sending a message that way but as soon as I go to send message it crashes. Why can't I get into my texts? And how do I fix it? I don't touch my settings as I don't know what anything means so its not been something changed on my phone
Ps when I try re start my phone it keeps going to the voice demand thing.

Mark keeps reappearing on iPhone screen?

I've had my iPhone 4 for less than a month, and since like the first week of having it there's been a mark on the screen which, no matter how many times I wipe it off, keeps coming back. Is it because of a crack on the screen or something else, and how could I possibly fix it?

IPhone 3GS crashes when I go to text

Iv had the phone for a year now and it's worked grate. But today I had 2 text waiting and every time I hit my messages button it goes white then crashes back to the main screen. Iv try's going into my contacts and sending a message that way but as soon as I go to send message it crashes. Why can't I get into my texts? And how do I fix it? I don't touch my settings as I don't know what anything means so its not been something changed on my phone

Canon Pixma MG 3250 Wi-Fi problem?

Recently I have bought the Canon Pixma MG 3250 printer. Now I want to print via Wi-Fi, and I discover that my iPhone and my computer are not able to find this printer. What am I doing wrong? Do I have to change the settings, and if I have to, how do I need to do that?

Cheapest/best way to buy an iPhone?

I want an iPhone and I'm not entirely sure which model but I've been looking around at contracts and found that it would cost £200 more paying monthly, than it would to buy the phone all at once (for a 4s though o2's website). I need help choosing the best model and best place to get it from etc?

Is there any way I can track my mac laptop?

I have the track iPhone app on my iPhone so that I can use my computer to track it, but I was wondering if the opposite was possible. Is there any app or such that I can use to track my mac with my iPhone?

What to do with blocked iPhone 4S?

I found an iPhone 4S, went to do the good deed and hand it in but it's already been reported/blocked. It turns on and you can see the persons screensaver and an alarm they set can go off, but there's a passcode so it's unusable. Is there anything I can do with it? I'm pretty sure it's of absolutely no use, but can I sell any parts or something?

How to change the network of my iPhone 4?

I have iPhone 4 from Japan, how can I change the network/carrier (SIM) to Globe/Smart? (Without jailbreaking)

I really don't want methods like jailbreaking, though I used it once but it didn't satisfy me.