You do not need a wireless network for the PS3. The PS3 can be connected via ethernet cable as well. And is the best way to connect the PS3 to online to prevent the possibility of lag when playing online.
You can also use the PS3 without the Online connection to Play games, DVDs and Blu-Ray Discs, but the online connection does help with updates besides allowing the use of the PlayStation Network, Store and online gaming.
Your PS3 must have a wireless adapter installed if you want to connect to the internet wirelessly. Otherwise, if you don't you will have to use an Ethernet cable. If you have a wireless adapter installed on your PS3. You will need to connect it to your wireless router. Go to the wireless network menu on your PS3. Find the (SSID) network name of your network. Connect to it!
Some PS3 have wireless network adapter installed and only what you need is to connect to your existing wireless network. Instructions are here http://www.ehow.com/how_4812599_up-ps-via-wireless-router.html If you do not have a wireless adapter, than you are stuck. So far there are no adapters which would work with PS3.
Make sure that your PS3 supports type of the wireless network you are using including security if you have one.
Broadband box that's either wireless or wired and make sure the ps3 is connected to it. Then sign in to playstation network.
You need to sign up for PlayStation network. For this you need to connect your wireless/wired internet to your PS3
First you need a wireless internet connection before you can connect the PS3 to wireless internet. You can not connect the PlayStation without already having internet service. If you have wireless internet service then you go to the PlayStation 3 settings to network connections. If you do not have a wireless internet, but have internet service you purchase a wireless Router and install it first before going to the PS3 setting for network connection. You can also connect a wired system running an ethernet cable from your router to the back of the PS3 and then going to the setting for network connection.
If you go to setting, scroll ALL the way down to network settings there should be Internet connection set this to wireless and it should scan for a wireless connection then you must enter your password etc...
If the PS3 is already wireless then it should connect to any internet network via a wireless router. Sony's PS3 support site has all the information you need for your setup.
It depends if you have public internet in your area or an unsecured network.
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If the wireless router is like mine then you also can make an ethernet connection with the PS3 using an ethernet cable
As far as I know all PS3's game with a wireless internet adapter installed. You just need to go into your PS3 settings and find the Internet/Network Connection settings. Once you find that you can have the PS3 guide you step by step on how to hook up y0 PS3 to your wireless internet connection.