T-mobile signal strength in Irvine

Does anyone use T-mobile for cell phone here? How is T-mobile signal strength in Irvine?

I use T-Mobile and don't have any problems with the signal strength. But as with all providers, it all depends on the exact spot. You can check T-Mobile coverage for any particular address/ZIP here:
http://www.t-mobile.com/coverage/pcc.aspx

Don't worry about cell strength as long as you have home wifi. TMobile allows you to place voice call over your local wifi network for free on most of their smartphones--including the new Samsung SIII.
http://t-mobile-coverage.t-mobile.com/4g-wireless-broadband-service

Other competing cell providers use femtocell technology to get around poor signal strength.
http://en.wikipedia.org/wiki/Femtocell