SVDO, or Simultaneous Voice and
EV-DO data, is a technology that allows supported
CDMA2000
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatib ...
EV-DO cellular phones to maintain an active 3G data session while the phone is on a call. Previously, the capability of being able to use data while on a call was found only on mobile phones using
GSM
The Global System for Mobile Communications (GSM) is a family of standards to describe the protocols for second-generation (2G) digital cellular networks, as used by mobile devices such as mobile phones and Mobile broadband modem, mobile broadba ...
cellular networks. In 2011,
Verizon
Verizon Communications Inc. ( ), is an American telecommunications company headquartered in New York City. It is the world's second-largest telecommunications company by revenue and its mobile network is the largest wireless carrier in the ...
released their first SVDO-supported phone, the
HTC Thunderbolt. The following year,
Sprint released their first SVDO-supported phone, the
HTC Evo 4G LTE. Although both phones support
LTE, which already allows for simultaneous voice and data, when the devices are only in 3G data coverage, they can use SVDO to be in a 3G data session while on a phone call.
External links
CDMA Development Group Announces 'SVDO': Handle Calls and Data at same timeYouTube - SVDO on the HTC EVO 4G LTE
3rd Generation Partnership Project 2 standards
Channel access methods
Code division multiple access