A recent OS update inserted S Voice to a double home button click and removed my ability to use a mic for text lengthy messages (S voice would fail after two sentences). With Google voice search returned, it works as well as before the negative impact update.
Before calling Ting, I uninstalled and reinstalled Google Search. (I also started the S Voice App, tapped Settings within the App, and unchecked all boxes.)
The new learning I couldn't find researching elsewhere for GalaxyS3: Settings / More [at the top right] / Application Mgr, [then swipe from right to left TWICE to reveal All / Tap All / [scroll down to Internet (for my example app for which I want to change the default) and tap it] / [Scroll down to Clear Defaults and tap it].
We also checked: Settings / My Device [at top ]/ Language and input / English / Google voice typing [add check mark].
[I'm waiting for Google to have a fix rather than use Home2 app for double home button click to reach Google Voice Search because Home2 invades your calls]
P.S. Renny in Ting support went and got an S3 and made the effort to successfully solve the problem.