Why can't I do voice+date with Verizon?

[boomhower]

Why doesn't this work? Voice is working off CDMA and data is using LTE, why can't I do both at the same time?

 

[notposting]

iPhone?

Works fine on basically every Android and WP8 device...

 

[JoeMcJoe]

What cell phone is it?

LG G2, Nexus5,...

New phones only have a single cell radio, so it can only be on one signal at one time.
This is for better battery life and cheaper chip sets.

For example if you're on LTE, it won't be connected to CDMA at all.
When your phone has a call coming in or a text message, a control message is sent over LTE that tells your phone to switch to CDMA to receive an incoming call or txt.

 

[bearxor]

I'm going to assume you almost certainly have an iPhone.

This is an iPhone limitation. The iPhone only has a single transmit chain, which allows the phone to be energy-efficient and support a massive amount of LTE bands.

Because of the design, no iPhone 5/5C/5S supports simultaneous LTE and HSPA/CDMA voice. Even on a HSPA network, the iPhone drops the LTE connection for a voice call. The difference being that HSPA has support for simultaneous voice and data to begin with.

Read this article for a higher explanation:
http://www.anandtech.com/show/6295/...ous-voice-and-lte-or-evdo-svlte-svdo-support-

 

[magomago]

that is unfortunate, but I suppose it makes sense given its a hardware limitation.
It makes sense (I'm assuming most people don't care about using the internet while they talk, but at the same time I've used both when I'm searching for something in a collaborative discussion).

That said, why couldn't it be setup so the system can have the best of both worlds: support data+voice, but turns off data when a voice call start; only turn it back on if the user explicitly does an action that requests it (ie: open up browser and do a search, or open up Yelp app, etc. etc.) All other apps are denied until the end of the call.

 

[Roland00Address]

I am curious but will this go away when the cell phone provider switch to voice over LTE if they're doing volte voice is just data and if the uplink has enough bandwidth they can just a locate some bandwidth for the phone call and some for the internet? Is this correct?

 

[bearxor]

that is unfortunate, but I suppose it makes sense given its a hardware limitation.
It makes sense (I'm assuming most people don't care about using the internet while they talk, but at the same time I've used both when I'm searching for something in a collaborative discussion).

That said, why couldn't it be setup so the system can have the best of both worlds: support data+voice, but turns off data when a voice call start; only turn it back on if the user explicitly does an action that requests it (ie: open up browser and do a search, or open up Yelp app, etc. etc.) All other apps are denied until the end of the call.

That would require a redesign of the iPhone's antenna system. For better or for worse, the thing Apple has chosen to do is to prioritize voice above all else. And the phone design itself doesn't really give a lot of opportunities to hide extra antennas on the back like you would find on a SGS4 or Galaxy Note 3.

The iPhone has two cellular antennas and boasts full tx/rx diversity. In order to get LTE going at the same time they'd need to add an additional antenna. I have a feeling this will be "fixed" in the next iPhone revision as Apple tinkers with a new design and adds a third antenna to comply with LTE-A specs.

I am curious but will this go away when the cell phone provider switch to voice over LTE if they're doing volte voice is just data and if the uplink has enough bandwidth they can just a locate some bandwidth for the phone call and some for the internet? Is this correct?

Yes. Eventually, as everyone moves to VoLTE, there will be just one connection for voice and data in LTE areas.

 

[boomhower]

Yes, it's an iPhone 5 so that explains it. Thanks guys.

 

[MrSquished]

I remember my HTC Rezound on Verizon had two radios or antenna or whatever, so you could do simultaneous phone and data.

 

[Ravynmagi]

This is a source of frustration for me at work. I'm in charge of our mobile devices. And our sales guys need to be able to talk on their iPhones and also use the wifi tethering for data on their laptop. So I have to issue them an iPhone and a mifi. It annoys me I have to give them two devices and two lines for something that should be done with one device and one line.

I hear in late 2014 Verizon should support simultaneous talk and data.