Dr. Hartwell, who wasn't involved in the study, said social-network trials aren't likely to replace conventional randomized, double-blinded, placebo-controlled trials, the gold-standard for generating medical evidence.

WSJ: ALS Study Falls Short, But Use of Social Media Holds Promise

My test model was running on the T-Mobile network and even indicated that it was using super-fast LTE, which T-Mobile is still building out, in some areas.

WSJ: Galaxy S 4 Is a Good, but Not a Great, Step Up

In addition to T-Mobile customers experiencing speeds twice as fast as T-Mobile's current 4G network on compatible devices, customers also will enjoy increased network capacity and reliability.

ENGADGET: T-Mobile brings 42Mbps HSPA+ to 56 new markets, now tops 150 locales