From today's DN:

Tired of having your cell-phone signal fade away when you ride the Market-Frankford El underground?

Well, if you're an AT&T user, you're in luck.

AT&T officials said yesterday its customers can now make calls, send text messages and check their e-mails when they ride the blue line underground, thanks to a new wireless system that the communications company installed in the c

I am sorry El users. I hope the trolley is still safe.