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Dvoshen

macrumors newbie
Original poster
Sep 25, 2012
2
0
We all know that Verizon iPhones can't perform simultaneous voice and data on it's own CDMA network. However, now that Verizon's iPhone 5 comes GSM unlocked, will it be able to run simultaneous voice and data if it's running on AT&T's HSPA+ network?
 
We all know that Verizon iPhones can't perform simultaneous voice and data on it's own CDMA network. However, now that Verizon's iPhone 5 comes GSM unlocked, will it be able to run simultaneous voice and data if it's running on AT&T's HSPA+ network?

Yes, but who would buy a Verizon iPhone 5 just so they could use it on AT&T's network?
 
My understanding is the voice/data multitasking feature is missing completely from the CDMA iPhone, so no.
 
On Hspa+ yes you can do voice and data at same time because it uses gsm. So yes vzw iPhone on AT&T will do it.
 
If you are going to use it on AT&T then its not.
If you're using it on AT&T mind as well be able to use their LTE network and not get the verizon version unless you want to use it for Verizon.

Maybe AT&T doesnt have LTE in his area with no plans for anytime soon, and maybe he wants to travel overseas to EU and be able to have a phone that works without getting it unlocked because it comes unlocked.

You never know, it could be a better buy for him, in his situation.
 
Maybe AT&T doesnt have LTE in his area with no plans for anytime soon, and maybe he wants to travel overseas to EU and be able to have a phone that works without getting it unlocked because it comes unlocked.

You never know, it could be a better buy for him, in his situation.

True.
But I think AT&T will roll lte in most places in under a year.
 
Just remember ATT "throttles" data when on voice call.

This has been confirmed multiple times. You will be lucky to get around 500 kpbs-800 kpbs speeds when on "simultaneous voice call when trying to use data.

It's ATT's sneaky way of handling data.

http://thesmartphonechamp.com/att-secretly-throttling-their-smartphone-customers-video/

I called and complained to ATT tier 2 tech support about this and he was "clueless" even though he knew what I was talking about. He tried to give me a stupid excuses about network congestion etc. But I finally said enough....I am techie. Ran speed test at 4AM on Thursday morning with no congestion. He knows it.

Than he said well "ATT really can only say that they can't guarantee speed but in non congested areas you should get 500 kpbs" And that's what the throttling speed is of data during voice calls.
 
True.
But I think AT&T will roll lte in most places in under a year.

You cannot assume this. ATT has been trying to increase their LTE coverage for years and look at where they are compared to Verizon. ATT won't come close to Verizon's current coverage for at least 3-4 years, and by that time Verizon will have even more.
 
My understanding is the voice/data multitasking feature is missing completely from the CDMA iPhone, so no.

The phone hardware is identical - just radio bands/firmware for LTE are different. The reason Verizon and Sprint iPhone 5s don't do it on THEIR networks is because for CDMA V+D you need another antenna which Apple chose not to add.

On a GSM network - regardless of the handset, V+D works. So any of the iPhone 5 models on a GSM network will support V+D.
 
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