My iphone won't let me call or text

Okay so i just got an iphone 4s it was my dads old one (i got it when his contract ran out) Anyway as soon as i put my sim in its registering my sim is there and i have full signal and everything but it won't send any texts or let me call anyone but i can receive calls and texts, anyone got any idea what's wrong and how i can fix it?

How to get a video from my mac computer to iphone 4s

I have a video, its little less then 4min long and its a quicktime movie file. So i don't want it on my itunes i want it in my photos or something. I have an app that will send it to my friend out of the country so i need to be able to choose the video out of my photos. I have photo stream if that matters. But please help me!

Is this illegal i don't think so?

OK so recently I plugged my ipod touch 4 into my coumpter and iTunes thought it was an iPhone for some reason so I just kinda ignored and synced my music when I unplugged my iPod and it said at the top at&t five bars and I had the phone app so I called my mom and it worked sorry for typos if there's any

Will my GoPhone work with the iPhone 3GS?

So, I got a GoPhone around 2 years ago and I'm still using it. I currently use the $25/month plan. I have a spare iPhone 3GS at my house. Can I put the SIM card in the iPhone and have it working? Can I also get data because my current plan doesn't have it? Also, if it can be working, what will I need to do to have it working? The iPhone is on iOS 6.1.3.

Questin about 3 mobile store in uk?

How much do you have to pay for an iPhone 5 with a 24 month contract? The price that you have to pay for the phone, not the sum that you have to pay each month.