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Forums - General - Talk and Data not possible at the same time for iPhone5... WTF?

Galaki on 14 September 2012

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iPhone 5 cannot handle voice and LTE data on CDMA networks simultaneously

By Edwin Kee on 09/13/2012 21:20 PDT

The best iPhone yet, announced early yesterday morning, is unable to handle simultaneous voice and LTE data on CDMA networks as confirmed by Apple. This would definitely help some people come to a decision as to which carrier will they purchase their iPhone 5, although I do admit that for the extremely casual phone user, it does not matter that much since you will most probably be holding the phone to your ear while carrying out a conversation so there is no need to worry about your data path being “blocked”, so to speak. Power users might be peeved at this development though, as many a time you might tether your iPhone 5 and an incoming call comes, breaking whatever data connection you were enjoying previously.

According to Apple spokesperson Natalie Harrison, it is “not yet possible” to perform side-by-side CDMA voice and LTE data on a “single-radio” design that is found in the iPhone 5. Do you think that this is because Apple wanted to ensure the hardware differences are kept to the bare minimum between CDMA and GSM users? This would rule Verizon and Sprint out of the big four telcos in the US, meaning you have just AT&T and an unlocked iPhone 5 on T-Mobile to experience simultaneous voice and LTE data.

Strangest limitation yet?



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ethomaz on 14 September 2012

Every phone I used have this limitation... when you make or receive a call the data is paused.

Which phones have this feature???

Edit - Just one in the market... Galaxy SIII... it use the second antenna to make voice and data at the same time instead to improve the reception only for call... anyway I prefer a improved call over data/call simultaneos... no issue here.



ethomaz on 14 September 2012

If you like a "little" more technical explanation read the link below:

http://www.anandtech.com/show/6295/why-the-iphone-5-lacks-simultaneous-voice-and-lte-or-evdo-svlte-svdo-support-

Now I know why the Galaxy S3 is so big and so heavy.

Apple made a really good job... the design created is just possible because the lack of "Talk and Data" simultaneous... I want and need an iPhone 5.



Galaki on 14 September 2012
ethomaz said:

Every phone I used have this limitation... when you make or receive a call the data is paused.

I don't use "every phone", so, I don't know that. I just assume it's the same across the board the same. It's just not logical to hold data hostage when you're talking and vice versa.



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ethomaz on 14 September 2012

Galaki said:

I don't use "every phone", so, I don't know that. I just assume it's the same across the board the same. It's just not logical to hold data hostage when you're talking and vice versa.

That's a really new feature... just work with LTE networks (4G) and for now the only phone capable is the Galasy SIII (I can't find other).

Edit - More about this LTE feature.

"SVLTE (Simultaneous Voice and LTE): In this approach, the handset works simultaneously in the LTE and CS modes, with the LTE mode providing data services and the CS mode providing the voice service. This is a solution solely based on the handset, which does not have special requirements on the network and does not require the deployment of IMS either. The disadvantage of this solution is that the phone can become expensive with high power consumption."



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ethomaz on 14 September 2012

And the iPhone 5 just not support simultaneous voice/data on Verizon.



xKakashi209x on 14 September 2012

It does support att right?



rocketpig on 14 September 2012

Bummer. I'm moving back to Verizon and buying an iPhone. A little disappointing to hear this but it's hardly a deal-breaker for me. I don't talk that much on the phone anyway.




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smbu2000 on 14 September 2012

Isn't that just related to the network the carrier uses? In this case CDMA.

In Japan there are two carriers who offer the iPhone; Softbank (GSM) and starting with the iPhone 4S, KDDI (CDMA). On KDDI this same limitation is in place, you can only use one or the other. With Softbank you can use both. This is not just related to the iPhone 5.

Just earlier I was talking to my girlfriend on the phone and while we were talking I sent an imessage to her iPad using my iPhone 4 to do both.




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Gamerace on 14 September 2012

That seems really strange, even my lowly Galaxy SI does simultaneous data and talk (Sometime's I'll pull up into on Google while talking to someone)