IMessage on iPhone 3GS not working?

I'm running iOS 6 and iMessage will not activate! It still works but using my apple id but I want to somehow activate it so I can use my mobile number. I have tried resetting network settings and signing out if my apple I'd nothing will make it activate please help! I'm on 02

IMessages can be activated in the settings under messages but you can only send iMessages to people who have iMessages on their device

  • Why is my iPhone 5 imessage not working all of a sudden? This has never happened before. It was working fine all day up until about an hour or so ago. I tried restarting and all of the "fixes" but nothing worked… Help!
  • Imessage for iphone still not working I have an iphone 4 and my imessage always always always stops working! I usually have to keep resetting network settings all the time just to get it to work again but now it's just stopped working all together! I've tried absolutely everything and checked every website for what to do but NOTHING works. i really need help!
  • My iMessage is not working on my Iphone 4 I got the iPhone 4 around 3weeks ago.iMessage was working just fine until today. My texts were not sending at all. I have no idea how to fix this. I tried restarting my phone and resetting it and it didn't help. Someone please help! Thank you! I have tried everything! It is working on my friend's phone though so why not mine?
  • IPhone push/imessage not working? Been having problems with my iPhone for about an hour, all of a sudden iMessage's have stopped sending and I'm unable to get any push notifications (twitter, facebook, etc) are coming through. I've reset the phone numerous times to no avail. Any ideas what else I can do? I've checked notifications in settings and their all on. It's happened before but it hasn't stopped my iMessage working too.