How to fix iPhone 4 texting problem?

I just got an iPhone 4, brand new, never used. For some reason, though, it won't let any texts through to anyone else. I've turned off iMessage, I've tried with and without area codes, but no matter what I do it sends me a text from a no-reply number (or something like that) saying that the number isn't right. I get calls and texts and I can call these same numbers, but my texts just won't go right. Please help.
Oh, and I tried resetting too, but that didn't work either.

Why does my iPhone vibrate 2 times while starting up?

I didn't do any after I started it up. It just started.

Added (1). It just started happening. What I mean by start up is when it does it when the white apple logo appears.

Added (2). Before it started happening I have already did disabled vibrate on ring.

Added (3). My ios is iOS 6.1.3 (latest version)

Added (4). My ios is iOS 6.1.3 (latest version)

Added (5). I think I have a curus because everything I type in safari's URL is deleted but, I'm not doing it.

Added (6). I think I have a virus because everything typed in safari's url is deleted.

Apple ID won't accept my payment method?

I'm trying to set up my appleID on my new iPhone. I'm using a debit mastercard. I put in all my info, the security number, my name, address, etc that it asks for BUT it just keeps telling me it won't accept my payment method. What do I do?

Added (1). I don't get why it won't take a debit card but it'll take an itunes gift card. I'm not going to buy anything, it'd be a waste of money to buy a gift card for myself.

IPhone 4 won't connect to Wi-Fi? - 2

My iPhone won't connect to my home Wi-Fi. It just keeps running on the 3g, even when I'm in range. When I try to connect it to the Wi-Fi only the little grey loading circle pops up without it ever connecting. I've reset all my content, reset my network settings, turned on & turned off airplane mode, and tried to forget the network & add it again. I'm not sure what else to do.

Can police arrest someone for this?

A little while ago I had my iPhone. Stolen and today I found they are sellin it on Craigslist because if serial # … What would the police do if I tell the info… Could I get my phone vback please help

How many GB should an iphone 4 have?

My iPhone 4 says i have 6.3 GB as capacity and i have 0 bytes left. I don't even have that much on my phone. Its only a year old and i thought iPhones had more space so does anyone know what's wrong?

What can I do with 300mb at&t iphone 4s?

I was wondering what all the possibilities are for my data plan?
I mostly just want to know because I will be using imessage when I don't have Wi-Fi so I will have my data plan on, but 300mb isn't much. If i text like 1500 ish messages/month, will it use all of my data? I have unlimited regular texts, but limited data internet for the imessage.

My jailbroken iPhone 4S is messed up

I did not like my jailbreaking experience so I wanted to unjailbreak it. Unfortunately, I do not have iTunes on my computer and could not restore it form there. I tried to reset my phone by erasing all content and settings on my phone ( i did this twice). But it didn't work and it made it to where I can't use Cydia, Safari, Game Center, Email, Maps and Youtube! I don't know if I should just rejailbreak it or not. Is that safe in my situation? If you know anything, or had this happen to you before, please help me! I don't want to mess up my phone even more!

Added (1). What If restoring doesn't work?

Best place to read / download Batman comics on iPhone?

Is there a website you know with scans or pdf files I could use to read some comics? I've tried some websites, but the downloads aren't compatible on mobile. Detective Comics issues in particular. (Really wanting to read #836).