Finding a reliable cellphone carrier is tricky when even a regional performance test can't prove that you'll get a good signal in your neighborhood. That's where Glove's new Android beta comes into play. The app monitors the areas where you use your phone the most, comparing them with crowdsourced quality reports; after three days, Glove will suggest the carrier with the best-rated service in those areas. Right now, the beta's US recommendations are limited to New York City and San Francisco, and only with the top four carriers. You'll also have to wait if you're looking for the iPhone version. Still, the software may prove a huge boon if you're thinking of switching providers.