no
When connecting my PS3 wirelessly I found better results to maintain the connection with the additional of security restrictions. When I put password and security on the router and into the network settings for the PS3 the PS3 become connected faster and not break connection which sometimes happened before the security was added. However a wired connection gave me even greater speeds on the PS3 connection tests and so I went with the best connection possible a wired connection. I made the same sort of decision on the HDMI cable when I purchased a higher quality Sony cable to connect it to the Sony HDTV.
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You can use a wireless connection if you have a wireless router
already have a wireless connection
To set up wireless internet on your PS3 first make sure that you have a wireless network with a internet connection. Go into the XMB and choose Settings>Network Settings>Set Up Connection. Follow the instructions on screen making sure you input valid information. Submit and your PS3 should now be connected to the internet with a wireless connection!
You can not share your phone wireless internet with your PS3. The PS3 will search for a WiFi connection and if one is found it can be used to connect to the internet. If you have internet service it is not a problem to connect to the PS3
you need to set up your wireless router with your internet connection to your computer, and then search for an access point on the ps3 under internet setting, under set up connection, then just follow the instructions from there