I was told by a "Verizon salesperson" that unlocking a phone doesn't give you the ability to use everyone of the service providers.different providers use different signals (att,T-Mobile can't use sprint,Verizon etc...).is this correct,or was he blowing smoke.
Seems a waste of time to unlock a phone if you can use only a limited number of providers.
If someone can direct me to a thread on this topic or have an answer it is appreciated.thnx
If you google "difference between gsm and cdma" you'll find a number of good explanations. The Gizmodo article would be a good place to start.
It really depends on the phone. Most phones are GSM/CDMA only. There are global phones though that work on GSM/WCDMA and CDMA. Verizon S3 can be used on GSM/CDMA, Sprint's S4 can be as well, etc..
Related
Sorry if this question has been answered already but i couldnt find a rom for this sort of problem. I found a post on it but it had no solution other than a link to the raphael rom development which i looked through and couldn't find a rom for what I'm trying to do.also will it be limited to no internet or will it have full access? I heard you have to download a program called getpst, I'm just not sure if there is a rom for this sort of thing. Thnx
you'd first have to have a CDMA radio in your Raphael... not a GSM one
secondly:
Consumers Can Now Activate Their Existing CDMA Handsets on
MetroPCS' Network, Offering the Freedom to Enjoy the Nation's Most
Affordable and Flexible Wireless Service
DALLAS--(BUSINESS WIRE)--June 26, 2008--MetroPCS Communications, Inc. (NYSE: PCS), the nation's leading provider of unlimited, flat-rate wireless communications service, announces the launch of MetroFlash(TM), allowing consumers to bring their compatible CDMA handsets to be used on MetroPCS' network. Coupled with its low cost, flat-rate unlimited wireless service, MetroPCS is further broadening consumers' freedom to enjoy more cost efficient, flexible wireless options. MetroFlash(TM) will eliminate for many consumers the requirement of having to purchase a new handset when signing up for MetroPCS service.
Offering consumers the ability to join MetroPCS with their existing handset makes switching carriers easier - and more cost efficient - than ever, said Tom Keys, Chief Operating Officer of MetroPCS. Not since number portability have consumers been offered such a convenient option in switching service providers. With the rising cost of gas and food, consumers are looking for ways to reduce expenses and the launch of MetroFlash(TM), along with our flat-rate, unlimited low cost service plans, makes MetroPCS a more affordable wireless option.
Customers using MetroFlash(TM) will receive a free month of service, plus unlimited local, long distance, voicemail and text messaging for $40 a month and pay a $30 fee. The service will be available at all MetroPCS company owned stores and select authorized dealers in all MetroPCS markets, excluding Las Vegas and Shreveport/Bossier City. Consumers can go to Unlimited Wireless Service - MetroPCS or a MetroPCS company owned store to determine if their phone is compatible with MetroFlash(TM).
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thnx for the quick reply and info, I would get it done at a metro location but if i get it done with them I wont have my phone able to access internet, I heard you can find a rom to flash it and it will have full access is, now the fun part is finding this so called metro rom. Thnx though
http://rferreira1.googlepages.com/WAPnMMS.pdf
http://forum.ppcgeeks.com/showthread.php?t=49341
thnx bro hopefully this method works with my att model
Gizmo87 said:
thnx bro hopefully this method works with my att model
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NO it will NOT
AT&T radios are NOT compatible...
DID you not read my first post?
crap, ok thnx anyway, im just going to keep att
Just to be clear, if your Raphael (branded or otherwise) has a slot for a SIM card, it is a GSM model. If there's no slot for a sim card, then it's a CDMA model. There is absolutely no way to use a GSM model on a CDMA network or CDMA model on a GSM network. If you try flashing a radio or rom from the wrong type of model onto yours, you run the risk of having a very expensive paper weight.
(models in the US)
GSM: Unbranded Touch Pro / AT&T
CDMA: Sprint / Verizon
if you're not sure what technology the network is, either ask here or ask somebody that works for that network (if they don't know, or even stumble when they answer as if they aren't 100% sure, ask somebody else)
just a hint: if you see PCS in the name, it's a CDMA network
2nd hint: if you see WCDMA written anywhere, that's not the same as CDMA and not relevant to this particular subject
My buddy whos on our family plan needs to downgrade from a Galaxy S III to a basic phone. I came across an Unlocked AT&T Samsung SGH-A157. When I called Verizon they used a blanket statement of "AT&T uses completely different technology than verizon, so their phones won't work on Verizon". I tried to explain that it's Unlocked and is CDMA based, so it should allow the sim card if I understand things correctly. He said "It doesn't matter if it's unlocked, AT&Ts technology is different then our." When I asked what technology exactly is different, he replied "Everything". He lost ALL credibility with that me for that statement. I constantly run into crap like this with Verizon... everything else is inferior, and only Verizon exists in the universe. Also, one MUST have what that absolutely don't need and we WILL lie to you and trick you into buying it or signing up for it even if you disagree!
Anyway. Is there any truth to this guys statement? I thought the whole point of "Unlocking" a device /phone was to make it work on another network.
Do I legitimately have to restrict my search for a Verizon flip/basic phone?
This brings up another concern because the plan was to get him a phone, deactivate his current Galaxy S3, activate the Unlocked phone, Unlock the Galaxy S3, and then sell it to some friends who have Metro PCS.
Also, Ive been told by some Verizon associates that I should be looking for GSM phones because we have Sim cards. But then other representatives say our phones are CMDA and thus should be looking for CMDA phones. Is there any consistent formula to this?
This forum is for i9300 international variant... I think you should ask a moderator to move your thread to your phone's forum in the appropriate section...
Sent from my GT-I9300
varxtis said:
....
Anyway. Is there any truth to this guys statement? I thought the whole point of "Unlocking" a device /phone was to make it work on another network.
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I'm not in the US so I'm not 100% on this but the SGH-A157 is GSM and Verizon uses CDMA tech. Afaik, they are not interchangeable.
Unlocking a phone does not change the radio tech used in the device.
You can probably shift between AT&T and T-mobile, but not CDMA carriers like Sprint or Verizon.
~ RazorMC
I'm sorry if this has been asked before, and if so i haven't been able to find it. This may seem like a stupid question, but I'm still pretty new to unlocking and rooting, ect. Now my question is, since the Sprint Galaxy S5 already has gsm network capabilities, why wouldn't it be possible to just download a different radio, and install that to unlock it for domestic gsm networks? I am asking because i have a Sprint S5 that i would like to use with T-mobile.
It might be that way if such an universal radio existed. But it doesn't. So moot point.
Interestingly, the S5 hardware is almost certainly capable of operating on all GSM and LTE bands. But artificial firmware limitations restrict your handset to only the frequencies that Sprint uses, plus a bare minimum of the most popular roaming bands.
Moreover, the Sprint version of the S5 is arguably the most restrictive variant. It simply isn't going to work on most TMB bands. You might find a NV hack to add a single AWS band. But in practical terms it won't work well on TMB.
Samsung and carriers structure it this way deliberately to discourge you from changing carriers. And to make it more likely that you need to buy a new phone if you do.
.
Ok, I was really mainly just curious, like I said I am new to this kind of thing, thanks for your response. I guess I will just wait to see if someone manages to domestically unlock it and post it, and then Ill give it a shot and see how well it works. I mainly use wifi at home for anything with the internet and downloads, I just need to get it to work for calls and texts.
kyleliamharris said:
I'm sorry if this has been asked before, and if so i haven't been able to find it. This may seem like a stupid question, but I'm still pretty new to unlocking and rooting, ect. Now my question is, since the Sprint Galaxy S5 already has gsm network capabilities, why wouldn't it be possible to just download a different radio, and install that to unlock it for domestic gsm networks? I am asking because i have a Sprint S5 that i would like to use with T-mobile.
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It used to be that easy. Things have become quite more difficult with secured bootloaders and verification checks. I think a lot of the international unlock voodoo lies in the NV items for Sprint devices. Unlocking it domestically can be done almost the exact same way as the L720 HOWEVER you will ONLY be domestically unlocked AFTER you internationally unlock it. If you domestic unlock first you'll have wasted your time.
Sent from my SPH-L720 using XDA Free mobile app
This situation was dealing with the SM-G965U U.S. S9+
I recently had itekimei unlock two S9+'s. They were from xfinity mobile, which is CDMA.
The phone's work, but only on CDMA band carriers i.e. verizon, sprint. With GSM, only messaging and data work. Data barely.
Is it commonplace to be stuck with either GSM or CDMA frequency carriers after having professionally unlocked the network? Like if you had a locked T-mobile phone and had it unlocked, you'd be stuck on GSM correct?
Maybe this is a given and I am ignorant.
I didn't exactly check whether xfinity ran on cdma or gsm before I purchased them, so that was my fault, not itekimei. He's a great guy. Highly recommend him, as long as you have your radio systems correct.
Edit: I think I found the answer, and that is the U.S. S9+ is not cross compatible with GSM and CDMA. Please correct me if I am wrong and tell me how to make it happen if you know. Thank you.
-Bob
The phone does work with GSM providers for calling, messaging and data. Check your preferred network type and select a different one. I replied to another thread you posted in with the setting I used that works.
Before unlocking my phone I had done an extensive amount of reading and research. If I was gonna pay for the unlock I wanted to make sure it would work for GSM networks. From what I can tell the G96U phone you have would be virtually identical to the one I have, with the exception of the carrier installed firmware. This is what would define the phone as Sprint or Xfinity. So if my phone works for calling, data and messaging on AT&T which is a GSM network then yours will too.
If needs be flash the U1 firmware to the phone as this would be the one that is on the unlocked S9 you can buy from Samsung. As a firmware for unlocked phones i believe it would be the most generically compatible with the providers for this scenario... well it's one of the reasons why I flashed it on my phone. The other is since I no longer use Sprint I dont need the Sprint bloatware.
There are tutorials on how to flash the G965U1 firmware to a g965U phone on this forum.
Also try keeping your inquiry to one thread instead of making multiple ones. Keeps all insights, discussions and etc in one spot and not multiple places.
scottusa2008 said:
The phone does work with GSM providers for calling, messaging and data. Check your preferred network type and select a different one. I replied to another thread you posted in with the setting I used that works.
Before unlocking my phone I had done an extensive amount of reading and research. If I was gonna pay for the unlock I wanted to make sure it would work for GSM networks. From what I can tell the G96U phone you have would be virtually identical to the one I have, with the exception of the carrier installed firmware. This is what would define the phone as Sprint or Xfinity. So if my phone works for calling, data and messaging on AT&T which is a GSM network then yours will too.
If needs be flash the U1 firmware to the phone as this would be the one that is on the unlocked S9 you can buy from Samsung. As a firmware for unlocked phones i would think it would be the most generically compatible with the providers.
There are tutorials on how to flash the G965U1 firmware to a g965U phone on this forum.
Also try keeping your inquiry to one thread instead of making multiple ones. Keeps all insights, discussions and etc in one spot and not multiple places.
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Sorry, I had actually came back here to delete this thread after I thought about it before I read what you wrote. I was just at work my apologies. And thank you for correcting me. I will check out how to flash the U1.
I plan to keep updating this XDA forum thread with what I find out about this problem, potential solutions, and hopefully what solves it. Hopefully this will be useful to those with the same or similar problem.
Please excuse typos...
The Solution
The reality is, prevention is the best solution here, do a bunch of research to make sure you don't encounter this problem. Read the rest of the post to better understand.
Original
Thank you in advance for reading this and helping me. (I also posted this in r/LGG8X, and am posting it here because some people don't have accounts with both. The more people that see it, the better, if by chance someone has ideas, wants to help, and has time to post the ideas)
It seems like a lot of people are having this issue, so maybe someone might have an idea.
I bought this phone to replace my Xiaomi Mi 9 (which was on the fritz, turning itself off randomly), about 1.5 weeks ago. I did my research and reasonably concluded that this phone has LTE band 12 and VoLTE; also it would be foolish of LG to not to have that. I could not find the VoLTE or Wifi Calling switches anywhere in the settings app, or in the phone app. I then dialed " *#*#4636#*#* " which opened up the "Testing Settings" (as usual). I click on the "Phone Information" tab, scroll down and find both the VoLTE and Wifi Calling switches, which are, to my dismay, greyed out.
I called Ting and they said, (after getting the IMEI), that this doesn't have LTE band 12, therefore no VoLTE. That confused me, because like I said, my research before buying had already concluded that it has band 12. The Ting rep said that's all he could do for me, so we ended the call. I did another 30 mins of research, again concluded it has band 12 with VoLTE. I also called LG themselves, and the rep there confirmed that this phone has band 12 with VoLTE, they also said "we would be more than happy to verify that the phone works with you carrier through phone conferencing". I asked the rep about about the previously mentioned VoLTE and Wifi Calling switches being greyed out, and they said that's because the phone has those 2 capabilities, but the carrier has to enable them.
I really love this phone, especially in comparison to the Mi 9 (even tho the Mi 9 is a good phone). I love the software better (even with the weird quirks that it has), and the value proposition is quite good. I really don't want to have to get a 3rd new phone in one year. If anyone has any ideas/help that would be greatly appreciated.
Thank you
[Edit]: P.S. I think this is partly a problem with LG, and partly with the carriers. I suspect that LG messed up with the IMEI/etc and other important identifiers as to what the device is, what exact version (i.e. LM-G850UM, etc) of a particular model (i.e. LG G8X Thinq Dual Screen, etc). This leads to the cell carrier's infrastructure seeing this phone as incompatible (doesn't see LTE Band 12, when it really is. The cell carriers, (from my own experience with 2 Ting Reps, and from what others have said on other forum threads), can't or won't solve this problem, even tho it may be solvable. From what I have seen on other forums, some got it solved by the cell carrier entering codes on the phone and doing something on their side. If LG and the all the networks would talk to each about this problem and get it solved if possible that would be awesome...
Update - 11/04/2020:
It seems I unintentionally bought a G8X with the Canadian rom LMG850UM20e. I am doubtful, but is the hardware the same or similar enough to flash the USA unlocked rom LMG850QM? Or is there something else I can do to make the Ting network allow VoLTE? As far as I can tell, the Canadian model still supports VoLTE LTE Band 12, but correct me if I'm wrong.
Update - 11/05/2020:
Ting says that my phone has LTE Band 12 and therefore VoLTE, but that will only work on ATT. A bit confusing because (like I said) the particular rom on my phone is Canadian (LMG850UM20e), so why ATT? The explanation for that, it seems is that ATT, (and Sprint), and the unlocked Canadian version have the same sub-model: LMG850UM. The USA unlocked version has a different sub-model (LMG850QM), the rest of the world has yet another sub-model (LMQ850EMW). There are around 15 different versions it seems; see this reddit post on the different models: (can't post the link yet) title: "Hey G8X owner, what is the submodel number and regional code of your unit? And where did you buy it from? I am trying to complete this list, also relating to timing of security updates and Android 10 release." posted in r/LG G8X
It seems like all the versions (LMG850......) have the same hardware, the only difference are the roms, which seem artificially disable certain capabilities of the phone. I am pretty sure my phone would do VoLTE just fine on Ting (or most other carriers). The thing wrong here, I think, is that the IMEI and other specific identifiers of the phone artificially show that the phone does not have the functionality, so the networks don't enable it. It also seems like LG made an agreement or something with ATT as well as Sprint (separately), to release carrier-specific version (as most brands seem to do), and that the phone would fully work on their respective networks and MVNOs, at least the versions in the LMG850UM sub model group, and the USA unlocked sub-model group. LG and T-Mobile seem to have come to no such *official* agreement, unfortunately. I am wondering any of the versions work with T-Mobile and it's MVNOs out of the box, some *modifications* may have to be done in order to get it working on TM towers. There may also be unintentional bugs in some or all roms that are possibly causing, or more likely, adding on to the problem.
Obviously, I am still trying to find my around this problem. I'm considering flashing a USA unlocked rom (LMG850QM sub-model), though not sure if that's possible, or if it'll change what the IMEI and the other specific identifiers tell the cell carrier about compatibility. I also wonder if carriers have the ability to override the artificial restrictions. There is also one report of T-Mobile supposedly fixing the same/similar problem with Sprint for a customer, see u/Veshtarii's comments on this reddit post: (can't post link yet) title: "LG G8X unlocked models having issues with US carriers." Posted in r/LGG8X. Another reddit user used a cheap Tracfone sim card to make his phone work on T-Mobile: (can't post link yet) title: "Tutorial: How to Update eBay Unlocked ATT / AT&T LG G8x" Posted in r/LGG8X. I am unsure if he also has VoLTE working.
Update - 11/06/2020
I'm done with this... It is pretty much impossible. I commented on the "Tutorial: How to Update eBay Unlocked ATT / AT&T LG G8x" post, and the OP responded and said he can't get VoLTE working, even with doing that update. The only thing that could possibly work, is flashing the USA unlocked sub-model onto it. However I probably don't know enough to do it right, but the bigger reason is that it'll probably brick it. I've realized, and should realized when I was doing the research for a new phone, that ATT and TMO's VoLTE/Wifi Calling work differently. They both use propriety coding, which they license to each brand to use in the models they both come to agreement on, and a similar agreement with each MVNO under their towers. LG and TMO seem to have made no such agreement for the G8X, therefore in all practicality, no G8X will work on any of their towers. Also, I called H2O Wireless just to see if my phone works with them, but they said my IMEI is not compatible; so I'm not the Canadian model that I have works in the US at all, that makes me think that not even the versions inside each sub-model aren't even compatible with each other. There is that one situation I mentioned, where the person who was having problems with Sprint before the merger, took it to TMO after the merger and the TMO tech fixed it for him. But I think he must've been having a different problem, because his phone is probably still technically running on Sprint towers. Sprint made the agreement with LG, so VoLTE would work in that instance. Flashing is practically not a solution for most people.
I should've done more research than I did before buying the phone. That is the moral of this story; make sure you do all your "homework" before buying any phone anywhere but the shop of the carrier you are using (or plan to use). That leads me to my number one complaint with phone brands and especially cell carriers as whole: they make it incredibly annoying, often difficult, and confusing to find a compatible phone that isn't on the carrier store. And the problem with that is that everything in any carriers' stores is everything is stupidly overpriced, and then they get you hooked with pricey deals you don't want. If you're reading this, you're most likely like me, you know better than to spend more than you have to on a phone and plan in the carrier store, you know (or at least kinda know) how to get past that. I get that cell carriers want to make money, but I tell you, this is too far. Anyways, the point is, there is no immediate solution, in other words, your only worthwhile solution is prevention, doing a bunch of research. I'm done with this... I'm returning this phone and getting the vanilla G8...
I have the LMG850QM. It has no VOLTE icons while in call even if on band 12. It uses HD+ and that will be shown in dialer during call. Internet does work while in call so believe that it is working. The switches are on like yours but greyed out. Wi-fi calling does work. By turning on airplane mode and then turning back on wifi the dialer will show that calls are being made over Wifi. The OnePlus 6T has VoWifi icons in status bar and this phone doesn't. I will say that this phone gets service in buildings where neither of my 6t's would have service.