The EVO fan blog Good and EVO is reporting that simultaneous voice calling and 3G data (SV-DO) is working on Sprint's HTC EVO 4G LTE. Some of you may be aware that unlike GSM carriers (e.g. AT&T), CDMA carriers (e.g. Sprint) are unable to serve voice and data over 3G simultaneously. So if you were on a CDMA device talking to someone, it would be impossible for you to connect to the internet. Verizon Wireless became one of the first CDMA carriers to offer both voice and data over its 3G networks when it launched the HTC Thunderbolt, early last year. However, Sprint customers wishing to use both voice and data at the same time would have to use 4G or Wi-Fi.

That is until now. If the reports from Good and EVO are accurate (and we have no reason to believe that they are not) Sprint's version of the HTC One X, the HTC EVO 4G LTE, does not drop 3G connectivity while on a voice call. A commenter on the G&E blog suggests that simultaneous voice and 3G data is also working on the LG Optimus Elite, apparently because the new Qualcomm chipset "separates the 1xRTT radio from EVDO".

If you have always used a CDMA device and never had a problem with restricted data access during voice calls, you may be wondering what all the fuss is about. The usefulness of having data connectivity while on a voice call is not immediately apparent, but there are numerous use cases. For example, you may be on a call with a friend and you need to share your location, alternatively you may need to guide your friend to your location using a map, or you may just need to lookup some information. I was once talking to a friend and she wanted to know the number of a particular restaurant, so I put my headphones on, fired up my browser, and found the number for her. Of course since you will need to take your phone away from your face and ear, you will need some kind of Bluetooth headset or speaker solution before you can start surfing the web while on a call.

Suffice to say simultaneous voice and data over 3G is simply an added bonus without any real detriment. If you are a Sprint customer and want to surf the web over 3G while on a call, then the HTC EVO 4G LTE is the way to go.

Update: The LG Viper 4G and the aforementioned Optimus Elite are reportedly capable of SV-DO as well.

[Good and EVO]

Abhiroop Basu
Abhiroop Basu is an opinionated tech and digital media blogger. As a doe-eyed twenty-something he started his first blog TechComet to comment on anything tech-related that caught his omniscient eye. Since then he has blogged for Android Police, Make Tech Easier, and This Green Machine. In the real world, Abhiroop Basu is a resident of Singapore and the Editor of The Digit, a subsidiary of The Potato Productions Group.

  • Merckle

    Hellz ya!

  • http://profiles.yahoo.com/u/NJKPFIML3UH36AN642OFYZ5QLM james p

    Ummm, I've always been able to talk on my OG EVO 4G while browsing.  Why would I be surprised by this?

    • Fifth313ment

      You could only do that if you were on Wifi or 4G otherwise it WILL NOT work. You'll notice whenever you enter a call the 3G icon will disappear. On the new EVO LTE it does not.

      who don't know ATT spent almost a year publicizing this feature on
      their network showing people on the phone and surfing the web. You don't
      think how often you would use it but you actually use it more than you
      think. Uses: On the phone and using navigation, browsing the web and on a
      call, receiving/sending an MMS message on a call, checking your email
      on a call, updating your Google Play apps on a call, getting missed
      calls voicemails while on a call and I'm trying to think of more?

      Lol, I think this is just awesome and a selling point for sure! There
      are plenty of times I'm out and my friends and I are trying to decide
      on going to see a movie or show and I am like I have to get off to use
      my internet and then I call you back. Now I'll be able to take charge
      and do it on the phone with them there. That saves me time and I'm sure
      it will save some business people money so well worth it.


    • Ray

      You've "always" been able to do this over wifi and 4G, not on 3g. If so, your talents are needed at NASA.

    • TechGuy33

      That was Impossible on any Sprint CDMA phone, Only on 4G or Wifi.

    • TechGuy33
  • Guest

    I've always been able to do this on my original EVO.

  • ProductFRED

    Even though this isn't HUGE, it's actually innovative and now I'm considering jumping from my Galaxy Nexus.

  • S0ckM0nk3y

    LG Viper 4G LTE does this as well

    • http://www.facebook.com/people/Xorg-Kc/100000867435778 Xorg Kc

      Yeah, the new EVO is'nt the first Sprint phone to have SVDO.

    • http://www.androidpolice.com/ Artem Russakovskii

      Good to know, I'm dumbfounded why Sprint doesn't promote this fact on of the new phones.

      • http://pharaohtechblog.blogspot.com/ Conan Kudo (ニール・ゴンパ)

        Mainly because the functionality is horribly broken unless you have EV-DO Rev. B deployed. As Thunderbolt users witnessed a bit last year, SV-DO is very glitchy and temperamental. Sprint actually tried this several years ago, right after the EV-DO Rev. A deployment. The result was awful, so Sprint blocked on Sprint CDMA 3G devices.

        • http://twitter.com/WillieFDiazSF William Diaz

          Im positive you are confusing SVDO with EVDV which was a separation of data and voice. Verizon went with EVDO as the technology was ready to go and cheaper than EVDV which was a few more months away and required a little more equipment for the backhaul. Sprint decided against it, only cause Verizon roaming wouldnt work that way and that would majorly hurt Sprint in the long run. 

          SVDO is implemented on a network level via 1xAdvanced but it is confused with dual radios and often confused with EVDO-B which similar to SVDO works in a way that routes the voice over data if implemented in the network, but generally will increase speed over EVDO A 

          • http://pharaohtechblog.blogspot.com/ Conan Kudo (ニール・ゴンパ)

            Errm, SV-DO by its very nature requires separate 1X and EV-DO radios. Verizon and Sprint LTE phones have at least two radios: a CDMA2000 1X (or 1X Advanced) radio, and a dual-mode LTE/EV-DO radio. When operating in EV-DO mode and using SV-DO, the phone activates the 1X radio and the EV-DO radio and connects to a tower with both.

            Really, it's just a hack to bypass the limitations on how EV-DO works instead of using EVDV. It's also not so much of a problem with EV-DO Rev. B because Rev. B implementation is somewhat similar to SV-DO, except with EV-DO carriers only.

      • http://profile.yahoo.com/7GU4N7CVDBJXMZOBFO3DMIQZH4 J

        I'm pretty sure I read somewhere (maybe even here?) that Verizon didn't really advertise the SVDO capabilities of the Thunderbolt because they weren't really sure how well it'd work.  They didn't want to make a big deal about it if it ended up they needed to scrap the program...   Maybe Sprint isn't fully 100% committed to this yet, just using the few phones that can as a trial, to see how well the network can handle it, before everyone runs out & gets one of these new fangled phones & clogs the network (like with the iPhone).

        • http://www.androidpolice.com/ Artem Russakovskii

          Good point, that's probably it.

        • http://www.androidpolice.com/ Artem Russakovskii

          Good point, that's probably it.

      • ThomasMoneyhon

         because their 3G network is slow. 4th place in speeds for 3G networks. When your in a call with a friend does the friend want to wait forever while you look up that bit of info on the web? "You know... I've got to be places, just txt me when its done loading."

  • TonyArcher

    When most of their network has 1x-advanced, shouldn't older phones be able to do SVDO as well?

  • Ssj4gogeta2003

    I'm confused.  To my knowledge, Verizon uses a CDMA network as well, but I was able to do simultaneous voice calls and data usage on my Thunderbolt over a year ago.

    • http://profile.yahoo.com/7GU4N7CVDBJXMZOBFO3DMIQZH4 J

      The Thunderbolt has SVDO as well...  It was the first phone Verizon had that could do both (as well as its first LTE phone)....  I don't think any others have had SVDO. 

  • Cuyah

    So we can't do this on the Galaxy Nexus?

  • Dave

    Confirmed, it works.  Just got mine activated, I'm talking and surfing.  Very useful feature...

  • Pjncom

    The Rezound is also capable of voice and 3g data at the same time.