Yes playstaion online is free,but if you downoad any downloadable content then you will be charged.
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To go and play online on your PS3 is free. The exception of course is that you do of course have to pay for an internet connection. Also certain online services on PS3 do cost money, such as netflix.
You can only play online for free with a PS3 or xbox360 or a wii. So make an account go to your call of duty game and go to multiplayer go to online connect and there you go your on online mode
No the PS3 network is free to play games on
It hacks on to the ps3 and it never lets you play online because if you play online you will be court by Sony and you may be arrested. Jail breaking a ps3 will also let you get free games on the ps3 but remeber not to EVER go online or i think you might not be aloud to play online either. All PS3s are currently jailbreakable, but when Sony throws the casual update, you're screwed. Also if you go online when jailbroken, Sony will simple ban you permanently from PSN or brick up your PS system. It also allows third-party applications to be downloaded and played.
You need the game in the PS3 to play it online, then it is an option available if you are also able to go online