Get a proper o2 contract...
Sorry i suspect you'd screwed it as you supposedly can't re downgrade to 1.1.2 after you've installed 1.1.3
However there are various threads tha say you can go back to 1.1.2
try them!
Is that fix if get proper o2 contract!?
i even try my another contract o2 sim on it but it says put the sim u have actived iphone before or replacement your o2 sim card from o2 storee!
You need to get a proper contract iPhone o2 SIM, not just a contract o2 SIM.
You can get your iPhone back to 1.1.2, but I'm afraid that when you do that, the phone function won't work (it still won't recognise either SIM), you'll just have a iPod Touch with a camera.
There is a jail break figured out for 1.1.3, but that isn't being released till Apple releases 1.1.4 in February, as the team behind the crack don't want Apple closing the loophole quickly.
SO i need to wait till feb and new 1.1.3 jail break !?
If you'd like to jailbreak it, then yes. However, you do NOT need to jailbreak it in order to make/receive calls. However, you DO need to get a proper o2 iPhone SIM. Go here and look at the plans (tariffs) that you MUST choose from in order for you to have a proper plan compatible with your iPhone in its current state (1.1.3).