Develop Bugs

Use Verizon SIM on ATT/Developer Ed HTC One M8

I have an HTC One M8 AT&T edition that I converted to Developer Edition. Can I take my verizon SIM and get any kind of service at all on it? I have heard that Verizon has to whitelist IMEI numbers but wanted to confirm there is nothing that can be done for it to even get basic voice/texting capabilities.

dwizzo said:
I have an HTC One M8 AT&T edition that I converted to Developer Edition. Can I take my verizon SIM and get any kind of service at all on it? I have heard that Verizon has to whitelist IMEI numbers but wanted to confirm there is nothing that can be done for it to even get basic voice/texting capabilities.
Click to expand...
Click to collapse
Verizon is still using CDMA for voice, so I believe you will not be able to get voice service. Not sure if data would work,and I'd be curious to hear whether it does or not. I'm not exactly sure how Verizon and Sprint SIMs work, since they are not a true GSM SIM.
That isn't really an answer, I realize. Really, more just a couple random thoughts on the matter.

redpoint73 said:
Verizon is still using CDMA for voice, so I believe you will not be able to get voice service. Not sure if data would work,and I'd be curious to hear whether it does or not. I'm not exactly sure how Verizon and Sprint SIMs work, since they are not a true GSM SIM.
That isn't really an answer, I realize. Really, more just a couple random thoughts on the matter.
Click to expand...
Click to collapse
I put my Verizon SIM in the HTC M8 Developer Edition (formerly AT&T), the phone is s-off, RUU to latest ROM, and rooted. NO voice service, NO data service.

dwizzo said:
I put my Verizon SIM in the HTC M8 Developer Edition (formerly AT&T), the phone is s-off, RUU to latest ROM, and rooted. NO voice service, NO data service.
Click to expand...
Click to collapse
wont work because verizon uses different radio frequencies. you cannot take ANY GSM phone and use it verizons network because its doesnt have verizons radio bands to work on their network....

paul_viado said:
wont work because verizon uses different radio frequencies. you cannot take ANY GSM phone and use it verizons network because its doesnt have verizons radio bands to work on their network....
Click to expand...
Click to collapse
Its more complicated than that:
- Yes, since Verizon uses CDMA for voice and EDGE data, you won't get those on a "GSM" M8 since it lacks the CDMA hardware.
- However, Verizon uses LTE for "4G" data in many areas, and in fact the same frequency bands as AT&T in some regions. They share 2 LTE bands (2 and 4) while Verizon also uses Band 13; and AT&T uses 17 (and I think 5) and those are not common between the 2 carriers.
It was an interesting exercise for the OP to try his Verizon SIM in the AT&T phone. I'm guessing there is a difference between a CDMA SIM and a GSM SIM or some other network restrictions that would prevent the AT&T variant M8 for getting any data service.
---------- Post added at 09:10 AM ---------- Previous post was at 09:09 AM ----------
dwizzo said:
I put my Verizon SIM in the HTC M8 Developer Edition (formerly AT&T), the phone is s-off, RUU to latest ROM, and rooted. NO voice service, NO data service.
Click to expand...
Click to collapse
The M8 is SIM unlocked? The AT&T variant is SIM locked by default.

redpoint73 said:
The M8 is SIM unlocked? The AT&T variant is SIM locked by default.
Click to expand...
Click to collapse
Yes, M8 is SIM unlocked. It recognized the sim but no radio signal or data.

dwizzo said:
Yes, M8 is SIM unlocked. It recognized the sim but no radio signal or data.
Click to expand...
Click to collapse
Thanks for the clarification. Then its as I somewhat suspected, and there is either some difference in the CDMA SIM or Verizon's network that is preventing the device from getting service.
Thanks posting the result of your "experiment".

Htc one m9w model

Hello, I bought from eBay Htc one m9 and today I have got the phone and I found that's is an M9w model.
I can't find any info about this model so I thought maybe some one here knows..
Thanks.

enablee said:
Hello, I bought from eBay Htc one m9 and today I have got the phone and I found that's is an M9w model.
I can't find any info about this model so I thought maybe some one here knows..
Thanks.
Click to expand...
Click to collapse
It's China version. You can see CID is HTCCN_701. Can use wcdma/FDD LTE/TD LTE(Band 39 is not support).
Use 810 Ver 2.0.:silly:

oliver962464 said:
It's China version. You can see CID is HTCCN_701. Can use wcdma/FDD LTE/TD LTE(Band 39 is not support).
Use 810 Ver 2.0.:silly:
Click to expand...
Click to collapse
So, this is a GSM version isn't it?
Is it safe to put a international (401) or unlocked (617) ruu?

shaqman89 said:
So, this is a GSM version isn't it?
Is it safe to put a international (401) or unlocked (617) ruu?
Click to expand...
Click to collapse
Yes. As far as I can tell the m9w is gsm only.
Beamed in by telepathy.

shivadow said:
Yes. As far as I can tell the m9w is gsm only.
Beamed in by telepathy.
Click to expand...
Click to collapse
This somewhat gets me confused.
I bought a used one with s-off condition, and found it was using stock marshmallow sprint firmware (651).
If it's gsm only, then wouldn't it have an issue with sprint firmware,which is for CDMA?
After reading a lot, I was under the impression that you can't switch firmwares between gsm and CDMA.
Sent from my HTC One M9 using Tapatalk

shaqman89 said:
This somewhat gets me confused.
I bought a used one with s-off condition, and found it was using stock marshmallow sprint firmware (651).
If it's gsm only, then wouldn't it have an issue with sprint firmware,which is for CDMA?
After reading a lot, I was under the impression that you can't switch firmwares between gsm and CDMA.
Sent from my HTC One M9 using Tapatalk
Click to expand...
Click to collapse
Yikes - pretty sure you can't, and that trying is a great way to brick your device. I'd guess that the model you have is somehow a CDMA version. Perhaps you could post some device information for us to research to help you determine exactly what you've got?

computerslayer said:
Yikes - pretty sure you can't, and that trying is a great way to brick your device. I'd guess that the model you have is somehow a CDMA version. Perhaps you could post some device information for us to research to help you determine exactly what you've got?
Click to expand...
Click to collapse
Thanks. I also thought that should be the case as well.
Anyway, this is from fastboot.
Code:
(bootloader) kernel: lk
(bootloader) product: htc_himawhl
(bootloader) version: 1.0
(bootloader) imei: 3572xxxx453xxxx
(bootloader) version-main: 3.41.651.21
(bootloader) boot-mode: download
(bootloader) version-baseband: [email protected]
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 0PJA20000
(bootloader) cid: SPCS_001
I'm aware that mid and cid could be changed using fastboot commands, but I never heard about changing the product field if this is really m9w version.
Anyway, I checked the imei with the box, and it matches.
The label on the box says it's m9w.
If i checked based on active bands, it is a cdma phone with only sprint 4g bands available, but going by imei (checked on imeidata.net), I got the bands are supposed to match witth the international model. I don't know how reliable that site is, though.
Code:
GSM 1800, GSM 1900, GSM 900, GSM850 (GSM800), LTE FDD BAND 1, LTE FDD BAND 20, LTE FDD BAND 28, LTE FDD BAND 3, LTE FDD BAND 5, LTE FDD BAND 7, LTE FDD BAND 8, LTE TDD BAND 38, LTE TDD BAND 40, LTE TDD BAND 41, WCDMA FDD Band I, WCDMA FDD Band II, WCDMA FDD Band V, WCDMA FDD Band VIII
Would that data be sufficient to see anything strange?

A little digging turns up that sprint spark is the most likely carrier using td-lte.
Cdma devices dont have a sim while gsm devices do. That's why you can't xflash. M9 gsm sort of does both.
Beamed in by telepathy.

shivadow said:
A little digging turns up that sprint spark is the most likely carrier using td-lte.
Cdma devices dont have a sim while gsm devices do. That's why you can't xflash. M9 gsm sort of does both.
Beamed in by telepathy.
Click to expand...
Click to collapse
Sorry if I'm not following entirely.
So you are saying that it is possible for m9w to be flashed using sprint firmware which would explains my case above?
Sent from my HTC One M9 using Tapatalk

shaqman89 said:
Sorry if I'm not following entirely.
So you are saying that it is possible for m9w to be flashed using sprint firmware which would explains my case above?
Sent from my HTC One M9 using Tapatalk
Click to expand...
Click to collapse
It depends.
If your network is "sprint" then you need to check if the phone has a sim card port. If it does then you have a gsm phone. If not then it's cdma.
Sprint also does gsm phones but the question is "how do you know if the firmware you're downloading is cdma or gsm?". Because you CANNOT cross flash a cdma firmware to a gsm device or vice versa.
So, presuming you DO have a sim card port it's gsm for sure so you can treat it as a generic gsm device BUT sprint are known for making their devices difficult to work with, but that could be cdma devices.. So yes, with gsm you should be able to mess with it to flash stuff but make sure you make a backup the very second you get into TWRP (everything except data) and, if you can, make the files available to flippy for others to recover their devices (your contribution for the help you have had and will get?). I can host the files forever on my gdrive with my m9 backup if needed and flippy will add them to his help thread in the general section.
So, by common locigal deduction, we don't know for sure but now you know how to tell if it is gsm or cdma but still be careful with firmwares as one mistake = a doorstop.
Beamed in by telepathy.

shaqman89 said:
Thanks. I also thought that should be the case as well.
Anyway, this is from fastboot.
I'm aware that mid and cid could be changed using fastboot commands, but I never heard about changing the product field if this is really m9w version.
Anyway, I checked the imei with the box, and it matches.
The label on the box says it's m9w.
If i checked based on active bands, it is a cdma phone with only sprint 4g bands available, but going by imei (checked on imeidata.net), I got the bands are supposed to match witth the international model. I don't know how reliable that site is, though.
Would that data be sufficient to see anything strange?
Click to expand...
Click to collapse
For what it's worth, the SKU you're software is reporting is 651 - that's definitely a CDMA version (Sprint).

shivadow said:
It depends.
If your network is "sprint" then you need to check if the phone has a sim card port. If it does then you have a gsm phone. If not then it's cdma.
Sprint also does gsm phones but the question is "how do you know if the firmware you're downloading is cdma or gsm?". Because you CANNOT cross flash a cdma firmware to a gsm device or vice versa.
So, presuming you DO have a sim card port it's gsm for sure so you can treat it as a generic gsm device BUT sprint are known for making their devices difficult to work with, but that could be cdma devices.. So yes, with gsm you should be able to mess with it to flash stuff but make sure you make a backup the very second you get into TWRP (everything except data) and, if you can, make the files available to flippy for others to recover their devices (your contribution for the help you have had and will get?). I can host the files forever on my gdrive with my m9 backup if needed and flippy will add them to his help thread in the general section.
So, by common locigal deduction, we don't know for sure but now you know how to tell if it is gsm or cdma but still be careful with firmwares as one mistake = a doorstop.
Beamed in by telepathy.
Click to expand...
Click to collapse
Sprint-branded M9s are always CDMA devices. Since LTE exists CDMA phones use sim cards as well. Please be carefull with such posts as the one I quoted. People might think they own a GSM device although they don't.

Flippy498 said:
Sprint-branded M9s are always CDMA devices. Since LTE exists CDMA phones use sim cards as well. Please be carefull with such posts as the one I quoted. People might think they own a GSM device although they don't.
Click to expand...
Click to collapse
Sorry, not 100% true at all. Sprint have sprint spark which is td-lte and uses gsm devices. I did extensive research into it last night.
If the cdma phones use simcards then those devices are gsm. Cdma devices are tuned at the factory for specific networks hence the lack of simcard slot. Simcards support gsm and the m9 with a sim doesn't support cdma but instead wcdma along with all the gsm bands too.
So I'm willing to bet a testicle. You?.
Beamed in by telepathy.

In short, I think this means, sprint is giving me a hard time lol.
So, just to summarize:
- From the box and imei, it seems I have m9w model (GSM)
- According to firmware, and available bands, I have sprint network (CDMA)
- Judging by the availability of a sim card slot (the provider I am using is GSM), it's definitely GSM capable.
So, going for that, it seems that it really is a CDMA model, just with different brandings?
Am I right?
As for the backup, I don't mind sharing it, though I don't see much benefit, since I have tried a sprint RUU, and it works fine.
I also used ViperOne and using only Sprint kernel would make it be able to recieve network signal.
So, I think it's safe to say that the one I am using one of Sprint variant, so I should be careful when cross-flashing.
CMIIW.

@shivadow:
Link #1
SIM cards: Before the advent of 4G LTE, the obvious difference between GSM and CDMA devices were with regards to the SIM card.
[...]
You may have noticed the latest smartphones intended for CDMA networks also coming with SIM card slots, to take advantage of the network’s 4G LTE capabilities. While GSM and CDMA devices cannot be interchanged even now, and will never be cross-compatible, that won’t make a difference as we continue to make a push towards 4G LTE.
Click to expand...
Click to collapse
Link #2
Many Sprint and Verizon phones now have SIM cards, but that isn't because of CDMA. The SIM cards are generally there for Sprint's and Verizon's 4G LTE networks, because the LTE standard also uses SIM cards. The phones may also have SIM slots to support foreign GSM networks as "world phones." But those carriers still use CDMA to authenticate their phones on their own home networks.
[...]
The problem is, they're turning it on in different frequency bands, with different 3G backup systems, and even, in the case of the new Sprint Spark network, using an LTE variant (TD-LTE) that doesn't work with any other U.S. carrier's phones. There are very few phones that support all of the carriers' LTE bands.
Click to expand...
Click to collapse
Link #3 (and Link #4 for comparison)
OEM ID: 0PJA20000
Supported Cellular Networks: CDMA800 (BC0), CDMA1900 (BC1/BC14)
Supported Cellular Data Links: cdmaOne, CDMA2000 1x, CDMA2000 1xEV-DO, CDMA2000 1xEV-DO Rev A
Click to expand...
Click to collapse
The Sprint M9 is not a traditional CDMA phone but that's due to LTE being a GSM technology and therefore requiring a sim card*. Nevertheless it's still CMDA enough for not being compatible with GSM firmware like the dev edition (617) or the wwe version (401). My statement is still valid. If you tell people every phone with a sim slot is a GSM device they may try to flash GSM RUUs on CDMA devices and brick their phone this way.
* Well, and because CDMA carriers probably understood that their phones need to support at least some GSM bands if they don't want to lose all customers who travel to other countries where CDMA most likely isn't supported at all.
Edit @shaqman89: Can you please take a look at the bottom of the backside of your M9? HTC engraved the model id at this place on the European WWE version. I don't know for sure but I guess that this might be the case for the other versions of the M9, as well. If you own a sprint M9 you should find "0PJA200" there. (The engraving lacks two zeros if you compare it with the MID that you get with fastboot getvar.)

Edit @shaqman89: Can you please take a look at the bottom of the backside of your M9? HTC engraved the model id at this place on the European WWE version. I don't know for sure but I guess that this might be the case for the other versions of the M9, as well. If you own a sprint M9 you should find "0PJA200" there. (The engraving lacks two zeros if you compare it with the MID that you get with fastboot getvar.)
Click to expand...
Click to collapse
You are right. It's really faint and small, but there is a model id there.
It is 0PJA200. I guess that's settle it and could be hard confirmation that this is a sprint variant.

Flippy498 said:
@shivadow:
Link #1
Link #2
Link #3 (and Link #4 for comparison)
The Sprint M9 is not a traditional CDMA phone but that's due to LTE being a GSM technology and therefore requiring a sim card*. Nevertheless it's still CMDA enough for not being compatible with GSM firmware like the dev edition (617) or the wwe version (401). My statement is still valid. If you tell people every phone with a sim slot is a GSM device they may try to flash GSM RUUs on CDMA devices and brick their phone this way.
* Well, and because CDMA carriers probably understood that their phones need to support at least some GSM bands if they don't want to lose all customers who travel to other countries where CDMA most likely isn't supported at all.
Edit @shaqman89: Can you please take a look at the bottom of the backside of your M9? HTC engraved the model id at this place on the European WWE version. I don't know for sure but I guess that this might be the case for the other versions of the M9, as well. If you own a sprint M9 you should find "0PJA200" there. (The engraving lacks two zeros if you compare it with the MID that you get with fastboot getvar.)
Click to expand...
Click to collapse
I owe you a testicle but I have no obligation to pay up on the clause that neither of us actually know what the hell is going on.. [emoji12]
But, what does that mean for the m9w?. Have we established that its a sprint phone and the regular firmware is ok or does it have an alter ego like jekyll and hyde?. Is there an easy way to find out if it'll be locked out, like branding etc.. Can you use any sim for any network?. A test on a 3g only network could reveal some truth?. Will the m9 take a 3g sim card?..
Beamed in by telepathy.

shivadow said:
I owe you a testicle but I have no obligation to pay up on the clause that neither of us actually know what the hell is going on.. [emoji12]
But, what does that mean for the m9w?. Have we established that its a sprint phone and the regular firmware is ok or does it have an alter ego like jekyll and hyde?. Is there an easy way to find out if it'll be locked out, like branding etc.. Can you use any sim for any network?. A test on a 3g only network could reveal some truth?. Will the m9 take a 3g sim card?..
Beamed in by telepathy.
Click to expand...
Click to collapse
The sprint phone and any GSM firmware are incompatible due to the different partition layout. The "problem" of this thread lies in the naming of the phone/thread. There are several variants called M9w which all have different MIDs (and slightly different hardware). Just like almost every GSM M9 is called M9u. That's why I prefer identifying them via the MID or their codename. The number part of the MID or the ul/uhl/wl/whl ending of the codename tell you exactly which model is lying in front of you.
Newer CDMA phones (every model that uses LTE) have some GSM frequencies enabled. On the one hand for being able to use LTE and on the other hand since many US customers who traveled to non-CDMA countries prefered GSM carriers in the US, as well, since they could keep their GSM phone whenever they left the US. Many CDMA customers had to buy a GSM phone and a sim card whenever they left the US due to the lack of CDMA on the rest of the world.
As far as I know sprint phones are sim-locked. However, you can contact sprint and request an unlock code so that non-sprint sim cards can be used, as well. Nevertheless, the sprint version doesn't support all GSM frequencies so you might not get any reception if your GSM carrier doesn't use the frequencies that are supported by the phone. That's why it's in almost every case impossible to get LTE with a non-sprint sim card on a sprint M9. (The same apllies to the verizon variant.)

So basically what you're saying is "sell the m9w and buy a wwe"?.
Beamed in by telepathy.

shivadow said:
So basically what you're saying is "sell the m9w and buy a wwe"?.
Beamed in by telepathy.
Click to expand...
Click to collapse
Well, not really. There is no variant that supports every existing frequency. Therefore, the best variant for user 1 isn't necessarily the best variant for user 2, as well.
Scenario a): You live in the US
If you own a sprint sim card the sprint m9 is totally fine. If you own a verizon sim card you should get the verizon variant. If you own a t-mobile US or an AT&T sim card and rely on VoLTE you should get one of their dedicated variants. If you don't care about VoLTE but own a GSM sim card you should get either the unlocked or the dev edition (both are actually the same phone - only the CIDs differ slightly and the dev edition's bootloader is already unlocked).
Scenario b): You live outside the US
If you rely on VoLTE you should get a phone that got branded by your carrier. If you don't care about VoLTE you should get one of the unbranded versions. There is SKU 401 for Europe, SKU 708 and 709 for Asia and SKU 710 for Australia and New Zealand. They're all (the branded and the unbranded versions) the same if you look at the hardware but the firmware is optimized for the dedicated continent/country/carrier.
With S-OFF you can always convert your GSM phone from one version to another. However, the frequencies that are supported by the US GSM variants differ slightly from the ones of the rest of the world.
Tl;dr: You should always choose the variant that suits you best.

Volte

Hi I have Taiwanese HTC 10.. s-off.. inlocked bootloader.. converted to wwe...runnung latest 1.90 firmware with viper rom..I am from India and my service provider JIO fully supports VOLTE
I cannot use VOLTE , and in the phone option, their is no choice of Volte..
Any ideas how to activate Volte calling on Htc10.
I think /system/customize/ACC/default.xml needs to be modified in order to do that..
Need help.

My understanding is WWE doesn't support VoLTE.
It is framework dependant and not just XML editing. You would need to flash back to the RUU for your country/market.
Sent from my HTC 10 using telepathy...

puneet724 said:
Hi I have Taiwanese HTC 10.. s-off.. inlocked bootloader.. converted to wwe...runnung latest 1.90 firmware with viper rom..I am from India and my service provider JIO fully supports VOLTE
I cannot use VOLTE , and in the phone option, their is no choice of Volte..
Any ideas how to activate Volte calling on Htc10.
I think /system/customize/ACC/default.xml needs to be modified in order to do that..
Need help.
Click to expand...
Click to collapse
If you can, load US unlocked code, 1.91.617.1. It has August security patches, as well as VoLTE and Wi-Fi Calling.

xela19115 said:
If you can, load US unlocked code, 1.91.617.1. It has August security patches, as well as VoLTE and Wi-Fi Calling.
Click to expand...
Click to collapse
This may not work due to both a CID/MID mismatch and differing radios for his market.
I'm curious to see if it would though. Radio/framework mismatch may leave it not functioning on LTE properly.
Sent from my HTC 10 using telepathy...

datafoo said:
This may not work due to both a CID/MID mismatch and differing radios for his market.
I'm curious to see if it would though. Radio/framework mismatch may leave it not functioning on LTE properly.
Sent from my HTC 10 using telepathy...
Click to expand...
Click to collapse
Hi.. i am from India and want to use volte on Reliance Jio Network here...
what do you suggest.. flash US firmware and flash US roms..
I have Indian variant OTA also which contain Indian radios also.
Please advice.
Regards.

puneet724 said:
Hi.. i am from India and want to use volte on Reliance Jio Network here...
what do you suggest.. flash US firmware and flash US roms..
I have Indian variant OTA also which contain Indian radios also.
Please advice.
Regards.
Click to expand...
Click to collapse
Frankly I don't believe flashing US firmware, radios or OS will work. US software is optimized for our bands and carriers, not yours leaving performance questionable.
Is your 10 a lifestyle or regular HTC 10?
Your best bet is to flash the most recent software for your market and if that allows VoLTE them great and if not then not much you can do.
Sent from my HTC 10 using telepathy...

datafoo said:
Frankly I don't believe flashing US firmware, radios or OS will work. US software is optimized for our bands and carriers, not yours leaving performance questionable.
Is your 10 a lifestyle or regular HTC 10?
Your best bet is to flash the most recent software for your market and if that allows VoLTE them great and if not then not much you can do.
Click to expand...
Click to collapse
Mine is regular HTC10

Can any one Provide with the HTC engineering Code? If you can provide with that code, than enabling VOLTE is possible. Just few settings to be changed and VOLTE can be activated.

HTC DESIRE 10 LIFESTYLE Root And recovery
datafoo said:
Frankly I don't believe flashing US firmware, radios or OS will work. US software is optimized for our bands and carriers, not yours leaving performance questionable.
Is your 10 a lifestyle or regular HTC 10?
Your best bet is to flash the most recent software for your market and if that allows VoLTE them great and if not then not much you can do.
Sent from my HTC 10 using telepathy...
Click to expand...
Click to collapse
Mine is HTC Desre 10 lifestyle india variant Plzz help me get installed with custom recovery and rom in my device

Having the same problem. Any help would be really appreciated.

Even Nougat update didn't bring VoLTE support, does anyone think is it going to come anytime soon

HTC 10 won't support VoLTE in India
ashwinkabbinahalli said:
Even Nougat update didn't bring VoLTE support, does anyone think is it going to come anytime soon
Click to expand...
Click to collapse
I had a chat with HTC customer care just now, and they said HTC 10 won't support VoLTE in India. They say the phone does not have the hardware specifications for Jio VoLTE, or even the upcoming Airtel-VoLTE.

You should have told that uneducated fool not to lie
SD820 includes GPU, CPU and Radio hardware inside it, it is not an independant hardware.
Those bastards just don't want to upgrade it
U should know that in other countries VoLTE is supported.
In Australia it was enabled via software update for Vodafone customers (pls confirm this fact urself)

https://www.reddit.com/r/Android/comments/5tce24/htc_10_in_australia_seems_to_be_getting_the/

unless the VOLTE in india is so different to other country it is hard to imagine why it will not work except HTC don't want to include it.
anyway did you try the Jio4GVoice app?

@DummyPLUG Yes. Jio4GVoice app is working.

I think we should comment bomb their FB and Twitter
What say u guys?(Indian owners)
Other country users also please support our cause and question their software support

ashwinkabbinahalli said:
I think we should comment bomb their FB and Twitter
What say u guys?(Indian owners)
Other country users also please support our cause and question their software support
Click to expand...
Click to collapse
Yes. I had a chat with HTC. they are talking rubbish saying its a hardware issue. what pisses me off is we pay so much money to these companies and they neglect us. even cheap Chinese phones got volte support. but HTC developers are lazy to include a volte option. what a shame.

I had a chat with HTC customer support today and I got a positive response regarding VoLTE update

I have a htc10 from Dubai
Took me 15-20 days working on it with diff rom and radios finally
Now my jio(India) sim is working on it
It does not show Volte on the top but call, 4g and sms is working

Getting VoLTE working for united states carriers on custom roms.

Before i explain what i/we all hope to achieve, ive been increasingly worried about network shutdowns. Ive seen at&t shut their 2G network down, I believe verizon is next with sprint or t-mobile to follow. For those who dont know without VoLTE, us verizon users use 1xRTT which is 2G voice. So, if verizon shuts the 2G network down, what do we do? So now that that speech is over.
Ive seen threads around on other phones and somehow the devs for these phones got VoLTE working on united states carriers. i dont know very much but i hope we all can use this thread to gather info and come up with ideas to get it working. I do know that the stock software has some sort of "sign" that in some way shape or form verifies the phone in some way.

The unlocked one supports many 4G VoLTE bands. If you want to know your carrier supports or not, ask your carrier customer support for VoLTE bands and cross check with below link.
http://www.htc.com/us/go/htc-10-unlocked/

satreddy said:
The unlocked one supports many 4G VoLTE bands. If you want to know your carrier supports or not, ask your carrier customer support for VoLTE bands and cross check with below link.
http://www.htc.com/us/go/htc-10-unlocked/
Click to expand...
Click to collapse
Useful info, but I believe our main issue with custom roms is some sort of signature that tells the carrier something, thats about all I know

Question Enable volte and vowifi with *#800#

Hi,
Is it possible, as with OnePlus 8 Pro, to enable volte and vowifi with *#800#?
Last year, it worked for me, installing an old version of the logkit, enabling volte and vowifi, and reinstalling the initial logkit.
Thanx for your help

misteurz said:
Hi,
Is it possible, as with OnePlus 8 Pro, to enable volte and vowifi with *#800#?
Last year, it worked for me, installing an old version of the logkit, enabling volte and vowifi, and reinstalling the initial logkit.
Thanx for your help
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My global model has volte enabled out of the box. Vowifi, I think not.

bulletbling said:
My global model has volte enabled out of the box. Vowifi, I think not.
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I'm pretty sure the global edition does work with VoWiFi but only on T-Mobile and their MVNO's (Metro by T-Mobile, etc) AT&T and Verizon only allow VoLTE on BYOD Unlocked devices.

rmendez011 said:
I'm pretty sure the global edition does work with VoWiFi but only on T-Mobile and their MVNO's (Metro by T-Mobile, etc) AT&T and Verizon only allow VoLTE on BYOD Unlocked devices.
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I'm on Verizon with no volte issues. Vowifi I believe you're correct, but pretty much irrelevant for most people as coverage is generally excellent for most carriers regarding high quality phone calls.

bulletbling said:
I'm on Verizon with no volte issues. Vowifi I believe you're correct, but pretty much irrelevant for most people as coverage is generally excellent for most carriers regarding high quality phone calls.
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I'm on Verizon as well. I actually find VoWiFi to be annoying, my Mom, and sis both have unlocked iPhones on Verizon and VoWiFi works, my dad has a Verizon Branded Moto Z4 and they could be on a call and as soon as they leave the house down the block the call drops, or the WiFi goes out (I have crappy ass Spectrum) and their calls drop, I'm the only one with only VoLTE and my calls never drop.