Have web os on my LG tv &half of the time can't watch my Netflix cause it keeps saying it's not connected to the internet!

SOURCE: LG VU INTERNET AND TV NOT WORKING

you need to set the specs for TMobile and how to add the settings check out this

http://www.mobileslate.com/blog/2009/02/28/lg-cu915-cu920-vu-network-configuration-settings/

read the bottom of the page and it gives the specific Tmobile information

SOURCE: "No signal" on hdtv while trying to watch netflix via xbox

First you need to eliminate the possibility that
the box is loosing video feed from the G.P.U.
hook the unit up in with normal yellow
white and red a/v connection for standard TV
out . if it happens shut the unit off and on again
and if you have sound and no video it's the G.P.U
becoming disconnect , the fix for this is to have
the chip re-flowed back to the P.C.board .the other
cause is a failing HDMI cable but im guessing you
already replaced that.

If you have any questions feel free to ask

Rob

Testimonial: "Very helpful"

SOURCE: modem driver for LG AD 5235 for Apple iBook OS X

Hi,

kindly visit Authorized service center and they will help you in this regard.

Thank you.

SOURCE: making connection between WII and internet and Netflix

Sounds like a netflix issue.Contact them with any information you have from them.Here is the link.
http://www.netflix.com/HowItWorks
Good luck!

SOURCE: HOW DOES NETFLIX WORK AND WHAT EQUIPTMENT DO I NEED TO WATCH IT ON TV

I am assuming you are residing in the US. Providing that and that you have an internet connection, you're pretty much set up. Make sure your browser is up to date and will work with Microsoft Silverlight (most modern web browsers do). Sign up for the service or start your free trial. What else do you need to go with netflix? Popcorn maybe?