Shammo: Verizon to offer phones with VoLTE only (no CDMA) by the first half of 2016
Don't worry about your current handset becoming obsolete so quickly, though. The nation's largest mobile carrier doesn't have plans to take down its CDMA network so soon.
And if you're concerned that the HTC One (M8) or Samsung Galaxy S5 you plan on buying today from Verizon will soon be useless for voice calls, this is nothing to fret about. The carrier will most likely wait until the majority of its active handsets in use have VoLTE capabilities, before it pulls the plug on CDMA.