OpenSignalMaps

Nationwide coverage maps aren't very useful in trying to figure out which mobile carrier works best in your hometown. For that, log onto OpenSignalMaps. This free site (and its free Android app use crowdsourced reports to compare coverage across major carriers all over the world.

Note: This link takes you to the vendor's site, where you can use this Web-based software or download the Android app.

--Robert Strohmeyer