Casio G’zOne Ravine Review


Call quality through the earpiece speaker on the Casio Ravine was better than other G’zOne models, including the Brigade and Rock. Voices were clear and natural; without sounding distant. There also wasn’t any noticeable distortion, even when turning the volume all the way up to high. This was also true when using the speakerphone, as it was loud and clear on our end. People that we called also said that we sounded clear and natural on their end. Signal reception was good, as we didn’t drop any calls and had 4 bars of 3G and 3 bars of 1X showing in high-coverage areas.

The included 1140mAh battery is rated to provide up to 5 hours of talk time or 3 days of standby time on a full charge. During out testing, we were able to get up to 5 hours of continuous talk time or 4 hours of PTT usage with a full battery.


Overall, the Casio G’zOne Ravine is a nice upgrade to the Rock that came out last year. We are glad that it retains Military specs for durability, and its rugged design means that it should hold-up to almost anything you can through at it. But most importantly we’re glad that the PTT quality is quite good, since that is one of the Ravine’s primary functions, with loud and clear voices on both ends. If you need a good quality PTT device, the Casio Ravine is an excellent choice, but if you message a lot and require a QWERTY keyboard, then we’d still recommend the Casio Brigade.

Software on tested phone: C751M020

Casio G’zOne Ravine Video Review:


  • Military specs and rugged design
  • PTT performance
  • Good call quality and signal reception
  • Large external clock


  • More bulky than the Casio Rock
  • HTML browser is limited
  • Camera flash is useless

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