I'm using Z30STA100-3/10.3.1.1151 and I have noticed that my phone app changes between the normal app and an updated version depending on my cell signal. The updated version involves a video call button on the dial pad, as well as a drop down menu for sorting the call log by all, missed, video, voice, and VOIP.
I'm using a Z30 on the Verizon network.
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Posted via my BlackBerry Z30