M9 / AT&T / VoLTE question - One (M9) Q&A, Help & Troubleshooting

Outside of the iPhone which is a "special case", AT&T has been known to only provision VoLTE and/or WiFi calling for users of AT&T-branded and sold [Android] phones; however, every once in a while, they make an exception for a particular model (e.g. / famously, the Pixel 2).
In the case of the M9, both the AT&T-branded (locked or unlocked) and unbranded, factory-unlocked models share the same HTC model # (OPJA110). I have also noticed that if I take a clean IMEI from an unbranded model and run it through various AT&T IMEI checkers, it almost always returns a positive result, as though this IMEI exists in AT&T's database. But if I take, say, a clean IMEI from T-Mobile-branded M9 (OPJA120) and run it through the same checkers, they say this isn't an AT&T phone (which would be correct!).
So this raises the question: in order to achieve VoLTE on an M9 on AT&T, do you absolutely have to have an AT&T-branded model? Or has anybody had success with getting AT&T VoLTE working on an unbranded, factory-unlocked M9? That an unbranded phone's IMEI passes the AT&T IMEI checks would *seem* to suggest that AT&T might treat *all* OPJA110s as AT&T devices, not just the ones that happen to have their logo printed on the back.
(I realize that if you have an unbranded phone, you may need to change CID and flash the AT&T firmware on the phone to get VoLTE to work...my question is solely about people's experience with the AT&T/network-side of the equation. An unbranded phone with an AT&T CID and software should be functionally identical to an AT&T-branded phone, but the question is whether the AT&T network will refuse to provision VoLTE for one's SIM/account because they don't see the phone as an AT&T phone based on its IMEI.)
Thanks!

Related

Does the German HTC One M8 has a Multi-band support for american networks?

Hi,
Does the German HTC One M8 has a Multi-band support for american networks?
thx
For T-Mo and AT&T, yes.
For Sprint and Verizon, no.
How can I find out which Version do I have? (I have bought it on ebay)
install adb & fastboot
reboot to fastboot
type " fastboot getvar all " in cmd
post the result after removing serialno and imei
Checked the mid. Bad luck Verizon :/ thanks anyway
...deleted
Meaning what, the US network you want to use is Verizon?
If so, than you need a Verizon version phone. No way around that, they don't have a GSM based network, its CDMA.
Also, even for AT&T and T-Mob US, a Euro version M8 won't have all the bands needed for LTE. Although, 3G and voice/SMS should work fine.
good
I have the same problem?
siemre I used htc one m8 since 2014 and recently bought another because he had sold it turns out that changing operator in my country, El Salvador.
which it is the company Digicel and using the band 900 Mhz to 4G.
It is to change the m8 and is supposed to be international version but it turns out it's version of att as I can do to release the bands and use it with any operator.
greeting
This is not remotely the same problem. The OP has the German version, want to use it on a US network, possibly a CDMA one (Verizon - although that part is not clear per my comment above).
I'd return the phone, if you can. There is no guarantee you can get LTE 900 MHz running properly on this device. At a minimum, it would cost you $25 US to s-off by sunshine (unless its already s-off), and then you can flash a different radio baseband firmware. Even then, its not a sure thing that it will work on your LTE network. I've seen plenty of cases where phones properly "converted" to the proper band support, still won't work on the desired LTE band.
So the money for s-off may just be wasted (plus the time and effort). Plus, if the phone is not previously modified, you may be voiding whatever return/refund rights you have (if you have any).

LG G7 Unlocked - Brightpoint?

I ordered a LG GM710ULM from a well-reviewed seller on eBay. It was listed as new condition.
I received it yesterday and on the box, the model says LM710ULMBLTPL. I think the "PL" is for the Platinum. When I booted it up, the model number is the LM-710ULM, the serial number is populated, and the software version is the 11g and security patch is November 2018. When I tried to "Check for updates" , it said there were no updates available. There's no SIM card in it, so I'm not sure if that affects the ability to check updates. I don't see any signs of any carrier apps. All
When I looked up the IMEI on one of the free checkers, it comes back with the model as LMG710ULM, but the network is listed as "ABC Brightpoint" and Location is "N". As I've poked around, it looks like this is some sort of regional variant, but still from the U.S. But I can't find any cell provider named "Brightpoint".
When I checked the IMEI on T-Mobile's website, it gave me an error. But when I used the chat support feature, the rep was able to look it up and confirm it's not blacklisted and should be able to be activated on T-mobile. When I ran the IMEI through Verizon's online checker, it told me it wasn't compatible with Verizon's network. Which is a bit unsettling since the unlocked version should be able to be activated on any network.
Can anyone offer some insight on what the Brightpoint version is and how it may be different from the plain vanilla 710ULM ? Willl it be covered by the LG manufacturer warranty and get updates? Is there any way to be sure it's not refurb or flashed?
Thanks!
The fact that you have a populated serial number is a good sign. Brightpoint has released legitimate firmware for the ULM model, but I still no nothing about them as a company (might be worth a search of the forms... I think I remember someone talking about them as an LG partner). As seen here, I think the 11g update was the last update they released, but it should be possible to switch over to GFI or LG's vanilla USA firmware (this will likely require the use of LGUP), both of which are the same as far as I can tell, however there are different contact and dialer apps that get used depending on which network you are on, as well a Google Fi app that is either enabled or disabled by default.
Regardless of what the VZW website said, you should have access to all 4 major carriers in the US. I don't know if you have a specific provider in mind or a solution that uses multiple carriers such as Google Fi or Straight Talk, but you should be good to go (although I would recommend flashing to the latest "USA" kdz, which sadly is still not Pie!)
This is exactly what happened to me. What did you find out? What did you end up doing? I was expecting the ULM.AUSAPL model but got the ULM.BPTPL. Apparently Brightpoint is a CDMA company. Does this mean not all GSM bands will be accessible on this BPT firmware? Ya, seems their latest update is still from 12/2018 (11g) instead of USA firmware from 3/2019 (10j). Trying not to have to flash/root. Odd that Verizon said not compatible when it too is CDMA? Really having trouble finding the TRUE factory unlocked ULM.AUSA version. Any insight would be greatly appreciated. Thanks.
Any info? Really would like to know what you found out. Did you keep the phone? Encounter any problems? ANY info would be greatly appreciated. DeeBG: maybe you can answer this: (BrightPoint is CDMA "provider" for all those tiny regional carriers) Since this "factory unlocked" ULM version is BPT does this mean that some or all of the GSM frequency bands are "disabled" for this model? And the USA version (GSM according to LG) has the CDMA bands "disabled"? And the GFI has all bands "enabled"? (for Fi auto switching) Is this how it works or what? Very confusing. Please help clarify this. Thanks.
I got one of the ULM versions off the bay too recently....it would not work on VZN...they denied activating it. I believe it does not have some bands needed. No pie for it either....so sent it back and got the VM version for vzn.
TRW1 said:
Any info? Really would like to know what you found out. Did you keep the phone? Encounter any problems? ANY info would be greatly appreciated. DeeBG: maybe you can answer this: (BrightPoint is CDMA "provider" for all those tiny regional carriers) Since this "factory unlocked" ULM version is BPT does this mean that some or all of the GSM frequency bands are "disabled" for this model? And the USA version (GSM according to LG) has the CDMA bands "disabled"? And the GFI has all bands "enabled"? (for Fi auto switching) Is this how it works or what? Very confusing. Please help clarify this. Thanks.
Click to expand...
Click to collapse
Sadly the confusion + lack of information is rampant for this phone, and this is down to one major reason. The chipset used in all LG G7 phones is the same (Qualcomm Snapdragon 845), however due to carrier subsidies and other sketchy reasons, the active bands are dictated by whoever sold the phone.
There are two providers in the US that I'm aware of that make use of all four major networks (those being Google Fi and Straight Talk). There are multiple free and ad-supported apps in the Google Play store that claim to be able to tell you which bands are supported by your phone (I only know of their existence and so cannot recommend one that's more accurate than another).
Thanks for responding! Boy..............."lack of information for this phone" is the understatement of the year! You aren't kidding! I've been trying to find out more for days but seem to get either very basic answers or different answers from different sources. So frustrating! Even LG is very vague in their answers. Just want to know if I will encounter any problems trying to use this on GSM networks when this is technically on CDMA firmware? And just cross-flashing this to the USA firmware will NOT "enable" all the GSM bands, right? RR125: A bunch of reflashed G7's have been being sold online, making my search for true answers even more frustrating. Did it come factory sealed? Meaning clear round stickers on both the sides? If not, then you may have received one of the models being reflashed to make it look like it is a ULM model. Which is bait and switch and illegal.
I'm in the same boat. I signed up for Google Fi and purchased my G710ULM from Amazon a couple months ago. I experienced issues immediately. WiFi calling didn't work; every time it was enabled I could see ER081 up top. After 1.5 months of terrible service, I downloaded Signal Spy and came to the realization that I was only ever connecting to T-Mobile. If I attempted to manually switch to the Sprint network, I'd get a message like "configuring mobile data". After about a couple minutes, my SIM card would lock and it told me to reboot my phone. If I attempted to switch to U.S. Cellular's network, I would get phone and data, but my phone number changed to a Nebraska number (note, I live in Missouri).
At about that time, I started researching the different firmware versions (with great difficulty) and found that I had a Brightpoint-specific firmware (11g). I've since used LGUP to flash to firmware 10j (Google Fi's latest G710ULM firmware). This has improved but not fixed my situation. I can now make WiFi calls, I can connect to T-Mobile and U.S. Cellular and keep my phone number on U.S. Cellular. However, when I attempt to connect to Sprint, I still get that "configuring mobile data" message and the SIM card locks. I ordered a new SIM card from Google Fi a couple days back and intend to test this phone with the updated card, but I've got a feeling that something else is at play here preventing me from connecting to Sprint.
Similar to other people, I did an IMEI lookup and while it comes up on the free IMEI checker sites, most of the main networks' checkers (ATT, TMobile, Verizon, Sprint) tell me that the phone is either incompatible with their network or they can't find it in their DB.
Potential SIM card issues aside, does anyone have any other ideas why I may not be able to connect to Sprint?
-Nick
It could always be a hardware issue but it sounds like the phone is not getting provisioned to work on Sprint. Can you verify SprintDM.apk is installed? You will likely need to install a third party app such as system app safe remover from Play store.
https://www.businesswire.com/news/h...ribute-LG-Wireless-Devices-Accessories-United
Brightpoint sells both cdma & gsm LG phones and are distributors nowadays who sell to other carriers.
The bands on the phone are locked and not capable of being used unless you unlock them via qpst or cdma workshop.
But these firmwares provided have them directly locked in the kernel.
loonycgb2 said:
https://www.businesswire.com/news/h...ribute-LG-Wireless-Devices-Accessories-United
Brightpoint sells both cdma & gsm LG phones and are distributors nowadays who sell to other carriers.
The bands on the phone are locked and not capable of being used unless you unlock them via qpst or cdma workshop.
But these firmwares provided have them directly locked in the kernel.
Click to expand...
Click to collapse
So if a Brightpoint ULM model was flashed with GFI ULM kdz why should it be GSM only unless they are different hardware version like TM? ULM hardware devices should support CDMA LTE bands.
mr3p said:
So if a Brightpoint ULM model was flashed with GFI ULM kdz why should it be GSM only unless they are different hardware version TM? ULM hardware devices should support CDMA LTE bands.
Click to expand...
Click to collapse
Snapdragon 845 no matter what phone will come with the same qualcomm modem as no manufacturer/carrier will take the extra cost to modify design.
But since the bands are locked via nvram, its upto the manufacturer and/or the distributer that loads the software to choose what will be locked or unlocked.
Bands can be locked via android kernel, but operators do nvram to protect phones from being used out of what they need or want.

AT&T S9 Root unlock question

Hi,
If I take a AT&T S9, Unlock the bootloader (if possible), root it, and flash a custom rom on it will I then be able to use it on Verizon?
Thank you in Advance.
Kc0r8y said:
Hi,
If I take a AT&T S9, Unlock the bootloader (if possible), root it, and flash a custom rom on it will I then be able to use it on Verizon?
Thank you in Advance.
Click to expand...
Click to collapse
ATz&T is GSM Verizon is CDMA incompatible
Perhaps @sw1173 is a dinosaur or a forum troll?
Verizon 4G LTE is not CDMA. It's 4G LTE and fully compatible with 4G LTE used by other carriers around the globe. Verizon 2g and 3g is CDMA, and only still exists to support older cellular data and IoT devices and some dinosaurs using ancients relics for devices. Verizon announced they were planning on completely shutting down their CDMA network the end of 2019, but just recently decided to postpone the shutdown for up to another year. Verizon has been permitting activation of an ever expanding list of unlocked phones for some time now, including devices like the OnePlus 6T that has no CDMA support, just 4G LTE. If you already have a 4G LTE device activated, you can swap the SIM into another 4G LTE device and as long as it has radio band support for Verizon's spectrum (use frequencycheck.com) as well as software support for Verizon's VoLTE settings, you're good to go. They don't seem to have a VoLTE whitelist like AT&T.
Sadly, the bootloader on the US Snapdragon S9 can not be unlocked at this point (no hacks) like the foreign SM-G960F(D)/965F(D) (Exynos with unlocked bootloader) or the SM-G9600/9650 (Snapdragon with unlocked bootloader) in order to install custom ROMs. I suggest everyone avoid US Samsung phones, period, because of this, and be sure to share your discontent with Samsung. Personally, if I were you, I would get the SM-G9600 or SM-G9650 (China / Latin America Version), root it (easy), and flash the files here to get Verizon support:
https://forum.xda-developers.com/galaxy-s9/how-to/guide-sm-g9600-sm-g9650-verizon-t3890695
If you buy or have a carrier unlocked US S9, including from AT&T, you can use it with any US carrier, including Verizon. You'll probably want to flash the Verizon firmware on it to get Verizon features including WiFi calling though:
https://www.reddit.com/r/GalaxyS9/comments/85ci7c/convert_atttmosprint_to_unlocked_s9_guide/
Presently you can't unlock the boot loader on the n960u therefore you can't flash Verizon's firmware. Call Verizon and you will be told they are CDMA and are not changing but are adding capability for 5G after 1/1/2020, which will allow the use of various GSM devices to use their CDMA network.. I just spoke with Verizon sales and their technical support.
sw1173 said:
ATz&T is GSM Verizon is CDMA incompatible
Click to expand...
Click to collapse
incorrect, this has been incorrect since the S8 when Sammy decided to not make different models for the US market. All S9's built for the US market are physically identical
mobileanimal said:
Perhaps @sw1173 is a dinosaur or a forum troll?
Verizon 4G LTE is not CDMA. It's 4G LTE and fully compatible with 4G LTE used by other carriers around the globe. Verizon 2g and 3g is CDMA, and only still exists to support older cellular data and IoT devices and some dinosaurs using ancients relics for devices. Verizon announced they were planning on completely shutting down their CDMA network the end of 2019, but just recently decided to postpone the shutdown for up to another year. Verizon has been permitting activation of an ever expanding list of unlocked phones for some time now, including devices like the OnePlus 6T that has no CDMA support, just 4G LTE. If you already have a 4G LTE device activated, you can swap the SIM into another 4G LTE device and as long as it has radio band support for Verizon's spectrum (use frequencycheck.com) as well as software support for Verizon's VoLTE settings, you're good to go. They don't seem to have a VoLTE whitelist like AT&T.
Sadly, the bootloader on the US Snapdragon S9 can not be unlocked at this point (no hacks) like the foreign SM-G960F(D)/965F(D) (Exynos with unlocked bootloader) or the SM-G9600/9650 (Snapdragon with unlocked bootloader) in order to install custom ROMs. I suggest everyone avoid US Samsung phones, period, because of this, and be sure to share your discontent with Samsung. Personally, if I were you, I would get the SM-G9600 or SM-G9650 (China / Latin America Version), root it (easy), and flash the files here to get Verizon support:
https://forum.xda-developers.com/galaxy-s9/how-to/guide-sm-g9600-sm-g9650-verizon-t3890695
If you buy or have a carrier unlocked US S9, including from AT&T, you can use it with any US carrier, including Verizon. You'll probably want to flash the Verizon firmware on it to get Verizon features including WiFi calling though:
https://www.reddit.com/r/GalaxyS9/comments/85ci7c/convert_atttmosprint_to_unlocked_s9_guide/
Click to expand...
Click to collapse
in addition to this correct information, id like to add that phones can be debranded by flashing the U1 firmware, but will require a modded Odin in order to get around the write protections put in place meant to stop us from doing that
sw1173 said:
Presently you can't unlock the boot loader on the n960u therefore you can't flash Verizon's firmware. Call Verizon and you will be told they are CDMA and are not changing but are adding capability for 5G after 1/1/2020, which will allow the use of various GSM devices to use their CDMA network.. I just spoke with Verizon sales and their technical support.
Click to expand...
Click to collapse
incorrect. Well, youre right in saying that it cant currently be unlocked or rooted, but you CAN flash verizons firmware. Verizon hasnt been a cdma carrier strictly speaking for a decade. LTE has always been GSM, and ever since vzw jumped on board, theyve been a hybrid at best. On top of that, with VoLTE becoming more and more popular, their cdma transceivers have been getting less and less usage every day. 5G isnt going to be the splash a lot of folks think it will either. New handsets to support a new communication method that just isnt needed in most places. And finally, most handsets produced in the last few years are hybrids, especially those sold in several countries. The biggest exception to that rule is the chinese phones that dont even have cdma radios in them.

Buying the S9 - G960F vs SM-G960FD Duos Any Advantages/Disadvantages between the two?

Just got the G960U here in USA and its great.
But that fact that its my first bootloader locked Samsung is bugging me and im pretty sure i'll return it.
I use UltraMobile mvno -T-mobile sim with Wifi calling enabled.
Both the bootloaders on these models are unlocked correct? They are both Exynos? If there another model that has unlocked bootloader?
Is one more desirable than the other?
Any major drawbacks/differences with these models if i were to use in USA?
for example, do devs create more custom roms for one or the other?
Or would one model be more likely to be able to get wifi calling better like if i flashed the right CSC?
Thanks
Hey I'm thinking about buying a G960FD as well for use in the US. I have G930FD's and G950FD's currently. The F models don't have LTE bands 30 (AT&T) or 71 (T-Mobile) - frequencycheck.com is a great site to look up phone/carrier compatibility. The lack of these frequencies in the radio is not a deal breaker because these are just for extra capacity at this point, though band 71 with T-Mobile offers additional outdoor range being low frequency. You will need to root to in order to get VoLTE in the US, and this will be necessary for T-Mobile since T-Mobile only has 4G coverage and some crappy 2G coverage outside of large cities. So without 3G coverage calls WILL fail outside of large cities if you don't root to enable VoLTE since the phone will not be able to place a call on 4G LTE bands without VoLTE. AT&T doesn't typically allow non AT&T unlocked phone IMEI's to use VoLTE, and AT&T will be shutting down 3g in a few years. At that point, their IMEI whitelisting may go away and they'll start allowing an phone to use VoLTE, otherwise they'll start losing customers. If they don't change their attitude though, your phone will also not work on AT&T in a couple years (they don't have 2G enabled anywhere anymore). Verizon is also shutting down their 3G network in a couple of years.
I actually came searching XDA to see if anyone had a SM-G960F or SM-G965F working with VoLTE (and specifically dual VoLTE on the FD since it's supported) on any US carriers. I haven't come across anyone yet. On the Exynos S7 and S8, if you don't need WiFI calling, it's actually pretty easy to get VoLTE working without having to install an bunch of crap. There's just 4 files you need to edit or overwrite in /system/csc and one additional VoLTE settings file you have to place there as well. I'm thinking it would be the same with the Exynos S9. I just need someone with an S9 to confirm. Since you need WiFi calling, it's going to be a bit more work. You can look at the CSC selection tool easily found by searching here on XDA for the Exynos S7/S8 to see what you'll need to get WiFi calling to work (it's not that bad to go through the code and files in the zip installer). You may end up having to extract the US Qualcomm S9 T-Mobile firmware to get the required files out of it, or you might even be able to get away with simply flashing edited portions of the S8 CSC selection tool files to your G960F to get VoLTE and T-Mobile WiFi calling to work. (If you flash the CSC selection tool to directly to the stock ROM, it will break a lot of things due to the permissions XML file). I would plan on spending a few weekends to get VoLTE and WiFi calling working on it though.
If anyone has any additional experience, please chime in here!!
Also, one thing to pay attention to whenever you flash stock firmware using ODIN is Samsung's stupid e-fuses that prevent you from downgrading to a different bootloader level which will lock you out of downgrading stock firmware. It's the first number in the firmware descriptor. For example, if you blindly flash a U3 or S3 firmware, you can NEVER go back to a U2 or S2 firmware outside of a custom ROM. And even with a custom ROM, you may end up with compatibility issues with the new bootloader.
Another thing is when you root Samsung phones, it trips another permanent e-fuse that not only voids your warranty, but prevents apps like Knox and Samsung Pay from working ever again on the device.
To answer your questions:
The FD is just dual SIM - no other advantages. There's actually a hack for the Exynos S7's that will convert them to dual SIM since it's the same hardware. I'm not sure if it's like that with the Exynos S9.
Yes, the Exynos international versions have an unlocked bootloader (just have to go to enable developer options in the OS then go into developer options and enable OEM unlocking)
Yes, having an unlocked bootloader means there will be MUCH more custom ROMS and development out there.
It looks like the SM-G9600 or SM-G9650 (Chinese/Latin American) are the versions to get. They have the Qualcomm Snapdragon 845 processor, is bootloader unlocked, and apparently even working on Verizon and T-Mobile (see the thread below). They don't have bands 30 or 71, but that's not the end of the world since most older phones as of a few years ago don't have those bands. I'm still wondering if dual VoLTE is working on these.
https://forum.xda-developers.com/galaxy-s9/how-to/guide-sm-g9600-sm-g9650-verizon-t3890695

A505U verizon with stock sprint firmware

Does anybody know if I can use Odin to put stock Sprint A505U firmware into my Verizon A505U? There's no OEM unlock option on the A505U (US version) phone so the bootloader is locked. I prefer not to root so I can use google-pay without any masking shenanigans.
The sprint firmware has a different set of enabled FDD-LTE bands that makes it more useful. Thanks.
Edit:
I've just learned that some carrier unlocked galaxies s8, s9, s10, etc. running pie will auto rebrand and adjust available bands to adapt to whatever Sim is installed. Does the A505U do this? This would be far easier than flashing if it works for the A505U.
The Samsung BYOD rebranding feature for U models based on sim insertion is always released about 10 months after the phone's initial release.
This has been the case for S8, Note 8, S9, and Note 9. It is not even released yet for S10.
So it will probably be getting close to mid-2020 before it is released for A505U, if even then.
Thanks for the response. I am still trying to wrap my head around how Samsung does their "BYOD Experience" rebranding. It appears that Samsung has gone the route of common hardware for US phones while supporting all the major carrier CSC's (multi-CSC?) within a given branded firmware .
Since only the CDMA carriers Xfinity, Sprint, and Verizon have the A505U, I'll try to find somebody with an ATT or TMO sim to see how my supposedly unlocked Verizon A505U reacts. I haven't seen any reports of what happens posted yet as it relates to the A505U.
I have a Galaxy A505U through Sprint. As you've said it is bootloader locked by the carrier. The 7 day trick does not work to show/enable Oem Unlock. I forget the reason now but I have reflashed stock firmware in Odin before which would modify system partion despite a locked bootloader. So I believe that you could in theory flash the sprint firmware in odion but I don't know how this will affect coverage. I do know sprint has roaming agreement in place with vzw so it should work.... But you're coverage may be degraded as I believe it's not going to support all of vzw lte bands... On a slightly separate note I am curious if there's some way to get around the lock using Odin. I am rusty on my Samsung modding(not eisnce sgs4) and terminology but I'm wondering if we could flash just the bootloader itself from another variant.
cominteldb said:
The Samsung BYOD rebranding feature for U models based on sim insertion is always released about 10 months after the phone's initial release.
This has been the case for S8, Note 8, S9, and Note 9. It is not even released yet for S10.
So it will probably be getting close to mid-2020 before it is released for A505U, if even then.
Click to expand...
Click to collapse
this is not accurate.. the devices contain multi csc in the omc partition so once the device is sim unlocked all the firmwares for usa variants have the csc for all the carriers.. you can use an app like phoneinfo and see the available csc's.. it has been this way as you stated since the S8 and up...
now if you are talking about U1 devices then thats a different story.. U1 devices typically have the same csc's but are just unbranded meaning little to no carrier bloat for example.
this is typically why all the firmwares are interchangeable because they are all containing the same csc. The only difference sometimes will be the userdata which might b labeled specific to a carrier but ultimately this doesnt matter either as they typically would contain only a few extra carrier bloat apps that shouldnt impact overall function at all..
heck, if you know what ur doing you can even change the csc code without even flashing any other firmware or putting another sim in.. i typically for example use sprint sales code with vzw network code bcuz i have verizon but sprint has more dialer codes..
as an example my g975u was purchased from verizon but i currently set the csc to GCF for research purposes and all my vzw services work great and to start I used a U firmware that had userdata labeled for SPR lol I also removed the last bit in the carrier code for research purposes.. when i toss a tmo sim in it automatically loads the apns and carrier mode for tmo and it just works without even rebooting
occams-razor said:
Thanks for the response. I am still trying to wrap my head around how Samsung does their "BYOD Experience" rebranding. It appears that Samsung has gone the route of common hardware for US phones while supporting all the major carrier CSC's (multi-CSC?) within a given branded firmware .
Since only the CDMA carriers Xfinity, Sprint, and Verizon have the A505U, I'll try to find somebody with an ATT or TMO sim to see how my supposedly unlocked Verizon A505U reacts. I haven't seen any reports of what happens posted yet as it relates to the A505U.
Click to expand...
Click to collapse
you are correct.. the usa variants are multi csc so they should work anywhere.. international devices also contain multi csc for w.e region it is purchased in. once sim unlocked if u say try to take ur phone to china or something ur device wont contain that csc but you should be able to get it to work with apn edits for example and might not have all the bells and whistles since couldnt flash their specific csc if that makes sense..
These phones nowadays are all world capable for the most part and contain the hardware to work on the differet networks (cdma gsm etc)
Samsungs "byod" experience just means its carrier unbranded so its sim unlocked out the box and can b used on any usa network without all the carrier bloat.. this is sort of pointless in my opinion since usually these firmwares can also b flashed to carrier branded variants..
on a side note, i have a tmo sim but mainly i use verizon and am getting an A50 from big red tomorrow so I will test this out for u and let u kno how tmo is in a vzw a50.
i have a tmo purchased a10e and my vzw sim works great in it.. in fact, vzw works better in the tmo phone than tmo haha but thats bcuz tmo isnt as good service wise in my area
elliwigy said:
you are correct.. the usa variants are multi csc so they should work anywhere.. international devices also contain multi csc for w.e region it is purchased in. once sim unlocked if u say try to take ur phone to china or something ur device wont contain that csc but you should be able to get it to work with apn edits for example and might not have all the bells and whistles since couldnt flash their specific csc if that makes sense..
These phones nowadays are all world capable for the most part and contain the hardware to work on the differet networks (cdma gsm etc)
Samsungs "byod" experience just means its carrier unbranded so its sim unlocked out the box and can b used on any usa network without all the carrier bloat.. this is sort of pointless in my opinion since usually these firmwares can also b flashed to carrier branded variants..
on a side note, i have a tmo sim but mainly i use verizon and am getting an A50 from big red tomorrow so I will test this out for u and let u kno how tmo is in a vzw a50.
i have a tmo purchased a10e and my vzw sim works great in it.. in fact, vzw works better in the tmo phone than tmo haha but thats bcuz tmo isnt as good service wise in my area
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Thanks for the great info! Please let us know how the TMO sim works out. I'm most curious about whether TMO features like their VoLTE and VoWIFI are enabled.
An Interested Observer...
elliwigy said:
the usa variants are multi csc so they should work anywhere...
These phones nowadays are all world capable for the most part and contain the hardware to work on the differet networks (cdma gsm etc)
i use verizon and am getting an A50 from big red tomorrow so I will test this out for u and let u kno how tmo is in a vzw a50.
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Hello..
Your comment sparked my interest.. as I'm a new owner of the Xfinity variant of the Galaxy A50.
Although I have no plans to leave Xfinity for the remainder of 2019.. as I'm waiting for my $250.00 Promo Rebate which comes around the 4th Month of service to cover just under 65% of my investment in the A50... leaving me with a $135.00 balance.. But, if what you state is indeed the case.. and these devices have the guts to run on traditional GSM Carrier's.. this add much more intrigue into the equation..:angel:
I'm not one to pry.. but, did you follow through with your purchase? and if so... what were your findings?
elliwigy said:
These phones nowadays are all world capable for the most part and contain the hardware to work on the differet networks (cdma gsm etc)
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That is correct but as someone who works in the industry and works with 3 out of 4 nationwide carriers I can say Att typically has there iphones manufacturered without a cdma attena making it gsm only.
I just checked my sprint A505U and it does have csc codes for many carriers including att, spt, vzw and t-mob among others. So generally another firmware should work fine then?
I had purchased a used SM a505u from dubai market. 1 YEAR IT WORKS FINE and after that I understand phone is not getting updates and there was issue with fingerprint sensor. And I decided to flah march2020 update from samfrew . But after that I am not getting network .it says networ error. Sim card crash.contact carrier etc...

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