[Q] AT&T HTC One on Verizon - AT&T HTC One (M7)

Is there any way to get the AT&T variant working on Verizon? Heard users could flash the T-Mobile radio for them but what about Verizon?

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No. Not at all possible.

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Thank you, it was worth a shot

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Airo18 said:
Thank you, it was worth a shot
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I think the correct answer is, no one knows yet. Modern smartphones are capable to supporting multiple network types, frequencies and technologies. Hardware-wise, the AT&T, T-Mobile, and (probably) the Sprint versions are identical and differ only by provisioning and preloaded software.

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d2kplus said:
I think the correct answer is, no one knows yet. Modern smartphones are capable to supporting multiple network types, frequencies and technologies. Hardware-wise, the AT&T, T-Mobile, and (probably) the Sprint versions are identical and differ only by provisioning and preloaded software.
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Click to collapse
Verizon and AT&T while both "4G LTE" using basically the same technology, have different frequency radios in them. They aren't cross platform capable.

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d2kplus said:
I think the correct answer is, no one knows yet. Modern smartphones are capable to supporting multiple network types, frequencies and technologies. Hardware-wise, the AT&T, T-Mobile, and (probably) the Sprint versions are identical and differ only by provisioning and preloaded software.
Click to expand...
Click to collapse
Rogue Leader said:
Verizon and AT&T while both "4G LTE" using basically the same technology, have different frequency radios in them. They aren't cross platform capable.
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Click to collapse
It's not possible, period. Sprint and Verizon operate on CDMA networks, whereas AT&T and T-Mobile operate on GSM. As long as the proper frequencies are supported, any GSM phone can run on any GSM network provided they're SIM unlocked.
4GLTE is currently only used by Verizon for data connections, and not for voice/text--that relies on the 3G CDMA antennae. The same goes for Sprint. The AT&T/T-Mobile-/International HTC One does not physically possess an CDMA atennae. Now before you get your hopes up about using a Sprint phone on Verizon, here's another little wrinkle. As you know, every phone has a serial number. That serial number is known as the IMEI on GSM carriers, and ESN on CDMA carriers. Both Verizon and Sprint operate a massive list of ESNs for everyone phone that can operate on their network. If your ESN is not found on that list, then you cannot activate it on that particular network period, paragraph, end of story. Do not pass go, do not collect $200.
Things get a little murkier with CDMA when it comes to flashing the radios over to other CDMA carriers, but you're looking at services like MetroPCS, PagePlus, etc and that's outside my realm of expertise.

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Airo18 said:
Thank you, it was worth a shot
Click to expand...
Click to collapse
Rogue Leader said:
Verizon and AT&T while both "4G LTE" using basically the same technology, have different frequency radios in them. They aren't cross platform capable.
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Click to collapse
The Verizon and AT&T networks use the different frequencies and technologies. However, the HTC One (like the iPhone 5) is able to run on nearly all permutations of modern phone networks. Apple makes only two versions of the iPhone, one for AT&T and one for everyone else. The AT&T version only exists because AT&T strong armed Apple into removing AT&T's LTE block from the main model.
For example, the Sprint version of the One is a world phone, usable on global "GSM" networks, as well as Sprint's "CDMA" networks. I put GSM and CDMA in quotes because modern wireless networks are more complicated than either of those two designations, and high-end phones are now designed to deal with those complexities via soft configuration vs. dedicated hardware.

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d2kplus said:
The Verizon and AT&T networks use the different frequencies and technologies. However, the HTC One (like the iPhone 5) is able to run on nearly all permutations of modern phone networks. Apple makes only two versions of the iPhone, one for AT&T and one for everyone else. The AT&T version only exists because AT&T strong armed Apple into removing AT&T's LTE block from the main model.
For example, the Sprint version of the One is a world phone, usable on global "GSM" networks, as well as Sprint's "CDMA" networks. I put GSM and CDMA in quotes because modern wireless networks are more complicated than either of those two designations, and high-end phones are now designed to deal with those complexities via soft configuration vs. dedicated hardware.
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Click to collapse
Sort of, sort of. You're going in the right path, but still not quite there. Hardware is still very important.
GSM phones are considered world phones because most of the networks operated in foreign countries run on GSM, right. CDMA world phones possess both antennae in order to access the networks over seas, but GSM phones don't have CDMA antennaes because... well, they don't need them. Your chances of going to a CDMA-only country is so very small that it's not worth while to make the investment. Let's take the opposite example using the iPhone 5: You can't take an AT&T/T-Mobile/International iPhone 5 and put in a Sprint SIM card. You can even do a iTunes restore using the Sprint IPSW onto that phone(actually don't know if that would work or not, but I digress) and it STILL won't get a signal because it physically lacks the antennae.

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unremarked said:
Sort of, sort of. You're going in the right path, but still not quite there. Hardware is still very important.
GSM phones are considered world phones because most of the networks operated in foreign countries run on GSM, right. CDMA world phones possess both antennae in order to access the networks over seas, but GSM phones don't have CDMA antennaes because... well, they don't need them. Your chances of going to a CDMA-only country is so very small that it's not worth while to make the investment. Let's take the opposite example using the iPhone 5: You can't take an AT&T/T-Mobile/International iPhone 5 and put in a Sprint SIM card. You can even do a iTunes restore using the Sprint IPSW onto that phone(actually don't know if that would work or not, but I digress) and it STILL won't get a signal because it physically lacks the antennae.
Click to expand...
Click to collapse
Again, I was talking about modern phones (like the HTC One), which are designed to be multi network and multi frequency global phones by default. HTC makes three versions of the phone: UMTS/GSM Only (MDM8215), UMTS/GSM+LTE (MDM9215), CDMA + UMTS/GSM +LTE (MDM9615). Sprint sells the version using the MDM9615 chipset which supports CDMA + UMTS/GSM + LTE. The Sprint variant has the capabilities to support all of the US/Canada frequencies, but I don't know what would be required to activate non Sprint frequencies. Neither do you. It's foolish to make grand pronouncements stating what is or isn't possible with phones until someone has actually attempted something.
Regarding your antenna statement, the HTC One has three antennas, one for WiFi and BT and two for wireless. The phone selects the best antenna to use in any given situation.
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d2kplus said:
Again, I was talking about modern phones (like the HTC One), which are designed to be multi network and multi frequency global phones by default. HTC makes three versions of the phone: UMTS/GSM Only (MDM8215), UMTS/GSM+LTE (MDM9215), CDMA + UMTS/GSM +LTE (MDM9615). Sprint sells the version using the MDM9615 chipset which supports CDMA + UMTS/GSM + LTE. The Sprint variant has the capabilities to support all of the US/Canada frequencies, but I don't know what would be required to activate non Sprint frequencies. Neither do you. It's foolish to make grand pronouncements stating what is or isn't possible with phones until someone has actually attempted something.
Regarding your antenna statement, the HTC One has three antennas, one for WiFi and BT and two for wireless. The phone selects the best antenna to use in any given situation.
MY EDIT: REMOVED IMAGE.
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I think you're a little confused on exactly what we're talking about here. Yes, you're absolutely right that the Sprint HTC One possess all the necessary ingredients to operate on just about any network/carrier in the world--GSM or CDMA. And, actually, I do know what's required in order to it to happen. For a GSM network, the only requirements to do so is a correctly provisioned SIM cards and the applicable access point names for the network you're trying to utilize. I've personally taken an CDMA world device and used it on a GSM network(VZW iPhone 5 on Straight Talk/AT&T). The Sprint HTC One would even work on Verizon, provided you get the ESN added to the master database of approved devices which is highly unlikely. Source: I worked for Verizon Wireless. Other CDMA carriers like MetroPCS, PagePlus, Cricket, etc do not have this requirement and it's relatively easy to flash Sprint/VZW phones over to their network.
But that's not at all what's being debated. WiFi and Bluetooth likewise have nothing to do with this conversation. As you've correctly noted, the MDM9215M chipset(step 10, highlighted in green) which powers the wireless antennae and allows them to connect to cellular networks does not support CDMA in the AT&T/T-Mobile/International version of the phone. Because of this fact alone, regardless of software configuration, these phones will never operate on a CDMA network. Now if you're an enterprising individual and decide to open your phone, remove the chip, and replace it with one that does support CDMA... you'd still run into the issue of the master database.
EDIT: I removed the image just to clean up the look of the post.

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unremarked said:
Sort of, sort of. You're going in the right path, but still not quite there. Hardware is still very important.
GSM phones are considered world phones because most of the networks operated in foreign countries run on GSM, right. CDMA world phones possess both antennae in order to access the networks over seas, but GSM phones don't have CDMA antennaes because... well, they don't need them. Your chances of going to a CDMA-only country is so very small that it's not worth while to make the investment. Let's take the opposite example using the iPhone 5: You can't take an AT&T/T-Mobile/International iPhone 5 and put in a Sprint SIM card. You can even do a iTunes restore using the Sprint IPSW onto that phone(actually don't know if that would work or not, but I digress) and it STILL won't get a signal because it physically lacks the antennae.
Click to expand...
Click to collapse
unremarked said:
I think you're a little confused on exactly what we're talking about here. Yes, you're absolutely right that the Sprint HTC One possess all the necessary ingredients to operate on just about any network/carrier in the world--GSM or CDMA. And, actually, I do know what's required in order to it to happen. For a GSM network, the only requirements to do so is a correctly provisioned SIM cards and the applicable access point names for the network you're trying to utilize. I've personally taken an CDMA world device and used it on a GSM network(VZW iPhone 5 on Straight Talk/AT&T). The Sprint HTC One would even work on Verizon, provided you get the ESN added to the master database of approved devices which is highly unlikely. Source: I worked for Verizon Wireless. Other CDMA carriers like MetroPCS, PagePlus, Cricket, etc do not have this requirement and it's relatively easy to flash Sprint/VZW phones over to their network.
But that's not at all what's being debated. WiFi and Bluetooth likewise have nothing to do with this conversation. As you've correctly noted, the MDM9215M chipset(step 10, highlighted in green) which powers the wireless antennae and allows them to connect to cellular networks does not support CDMA in the AT&T/T-Mobile/International version of the phone. Because of this fact alone, regardless of software configuration, these phones will never operate on a CDMA network. Now if you're an enterprising individual and decide to open your phone, remove the chip, and replace it with one that does support CDMA... you'd still run into the issue of the master database.
EDIT: I removed the image just to clean up the look of the post.
Click to expand...
Click to collapse
The ESN information for LTE enabled smartphones is included on the SIM/UICC/R-UIM rather than the phone itself, so the issue is one of provisioning a given phone's capabilities to work on the VZW vs the Sprint network. I don't know if this is user configurable or if carriers would be willing to do.
Regarding the antennas, the same antenna configuration is used on all models. There is no additional antenna on the CDMA capable model. That functionality is provided by the Qualcomm MDM9615. It's a bit unfortunate that HTC didn't take Apple's approach in using the MDM9615 on all HTC One variants. I assume that VZW's decision to pass on the phone may have had something to do with it.
Now back to your original point, I was mistaken and you are correct. While the Sprint version could potentially be used on AT&T, T-Mobile and Verizon. The AT&T (UMTS/GSM+LTE) version cannot be used on the Verizon network, and that's a damn shame.

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unremarked said:
It's not possible, period. Sprint and Verizon operate on CDMA networks, whereas AT&T and T-Mobile operate on GSM. As long as the proper frequencies are supported, any GSM phone can run on any GSM network provided they're SIM unlocked.
4GLTE is currently only used by Verizon for data connections, and not for voice/text--that relies on the 3G CDMA antennae. The same goes for Sprint. The AT&T/T-Mobile-/International HTC One does not physically possess an CDMA atennae. Now before you get youSprint
esopes up about using a Sprint phone on Verizon, here's another little wrinkle. As you know, every phone has a serial number. That serial number is known as the IMEI on GSM carriers, and ESN on CDMA carriers. Both Verizon and Sprint operate a massive list of ESNs for everyone phone that can operate on their network. If your ESN is not found on that list, then you cannot activate it on that particular network period, paragraph, end of story. Do not pass go, do not collect $200.
Things get a little murkier with CDMA when it comes to flashing the radios over to other CDMA carriers, but you're looking at services like MetroPCS, PagePlus, etc and that's outside my realm of expertise.
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Click to collapse
IMEI/ESN is carrier specific. Can't be changed. However can't we trick the phone itself through software to unlock the capability of using a Verizon LTE Sim in a Sprint phone. Flash a Verizon ROM? Sprint and Verizon are the exact same CDMA/LTE band, same internal hardware.
Speaking only of using a Verizon LTE sim for data on a Sprint device. I have a Sprint One. Not with Sprint any longer. Want to use my device as a PDA, internet capable.