If you were able to unlock an AT&T iPhone 5, you could use it on T-Mobile (provided, of course, that you had the appropriate SIM card), but you won't get any LTE coverage. LTE interoperability is equally problematic because, as CNET's Maggie Reardon told us earlier this year, LTE roaming between multiple networks generally isn't possible. Will I be able to use the iPhone 5 overseas?Yes, though there are a couple of caveats. With the iPhone 5, Apple is doing away with the dual-mode GSM/CDMA support that we saw in all versions of the iPhone 4S. Instead, it's selling three distinct iPhone 5 versions: one CDMA-based model and two GSM-based models with slightly different LTE bands. Having separate versions is another factor that makes carrier interoperability difficult. On the other hand, losing the CDMA support on AT&T phones is irrelevant since AT&T customers have no use for it anyway.
To globe-trotters, though, things don't really change, AT&T's GSM model will work abroad (GSM is the dominant cellular technology worldwide), but so will the Sprint and Verizon models, It's in the fine print on Apple's site, iphone 8 antique white karat petals case but the CDMA iPhone 5 will support quad-band GSM/EDGE (2G) and UMTS/HSPA (3G) networks, So, yes, the iPhone 5 will be a mostly global phone no matter which version you have, Just note that most carrier versions of the iPhone 5 will come locked to specific overseas roaming partners, Sprint will unlock the global SIM if you've been a customer for 90 days and are in good financial standing (your bill is paid), We're still waiting on an answer from AT&T, Though Verizon originally said it would unlock global SIMs for customers who have been with the carrier for 60 days, Big Red now tells us that its iPhone 5 is unlocked, That means you could even use it on AT&T's 3G networks, but not on LTE (remember what we said above about LTE interoperability)..
But what about global LTE roaming?As of now, none of the carriers is offering LTE roaming outside the United States. And this is where it gets complicated. Though the CDMA iPhone supports five LTE bands, AT&T's iPhone 5 supports only two. We're not sure why. That won't make a difference when you're home, but that means the AT&T iPhone 5's global LTE coverage will be less extensive, if we ever get it. I don't want to sign a carrier contract Will Apple sell unlocked iPhones?Specifics were scant at first, but Apple updated its iPhone comparison tool with the following information shortly before preorders started.
The unsubsidized price starts at $649 for the 16GB model, $749 for the 32GB model, and $849 for the 64GB model, Yet, we expect that Apple iphone 8 antique white karat petals case won't offer the unlocked models right away, For instance, the unlocked iPhone 4S didn't go on sale last year until November 11 -- almost a full month after the carrier-subsidized versions, Up until now, CDMA iPhones don't run simultaneous voice and data, Will that be the same with LTE?Thanks for opening that can of worms, Current Android LTE phones on Sprint and Verizon offer simultaneous voice and data as long as you're connected to an LTE signal (the same is true on AT&T LTE phones), Sounds great, right? Well, not so fast..
In theory that capability should extend to an LTE iPhone 5, and AT&T will let you browse while calling as much as you like. Sprint, however, has confirmed to CNET that "simultaneous voice and data capability on LTE does not apply to the iPhone." Verizon's statement was different, but equally disappointing. "The iPhone 5 was designed to allow customers to place a voice call on the Verizon Wireless network, while simultaneously allowing customers access to the Internet over Wi-Fi," the company told us. When we inquired as to the reason for the restriction, a Verizon spokeswoman told us to contact Apple.