Verizon's Samsung Convoy 2 is a rugged handset with push-to-talk functionality and some extras besides.
The red button serves as a programmable convenience key when push-to-talk mode is off. When that mode is engaged, however, the red button is your push-to-talk command center.
On the other spine, the Convoy 2 has a disappointing 2.5mm headset jack. (Read the full Samsung Convoy 2 review.)
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