Develop Bugs

[Q] Idea: Virtual SIM Card

Alright. I love my Evo, but I hate my Sprint Coverage. My AT&T Contract isn't quite up yet, and I was thinking: What is stopping us from all being able to change providers to AT&T or T-Mobile? GSM vs CDMA. What is we copied an AT&T SIM card and put the data on the phone, and we told the phone to treat it as a SIM? We could then all switch to AT&T. Just throwing that out there. /discuss.

Sorry but I didn't get AT&T for a reason, their Crap!

While that is an interesting idea, it is impossible. The physical radios used in CDMA and GSM phones are different and cannot be interchanged without swapping entire circuit boards.
Peblairman said:
Alright. I love my Evo, but I hate my Sprint Coverage. My AT&T Contract isn't quite up yet, and I was thinking: What is stopping us from all being able to change providers to AT&T or T-Mobile? GSM vs CDMA. What is we copied an AT&T SIM card and put the data on the phone, and we told the phone to treat it as a SIM? We could then all switch to AT&T. Just throwing that out there. /discuss.
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SIM card or not, there still needs to be an actual GSM radio chip on the board, the EVO does not have this and I've personally seen the circuit board 1000 times.
Short of getting your hands on an RF chip for AT&T, unsoldering the Qualcomm radio chip and somehow resoldering the AT&T chip (probably a nokia chip) onto the EVO board I don't see this happening, not even in a virtual way.
Hardware is still needed to transeive the proper frequency and TDMA/GSM waves for AT&T usage.
In short, you'd basically be building your own EVO for AT&T, and you'd need access to circuit boards and other things needed to build ont that board, and unless you work at Qualcomm and have access to GSM RF chips, I don't see that happening, nor would it be worth the time nor effort. Just buy yourself whatever version of the EVO decides to get built for AT&T if you want AT&T.
Furthoremore, AT&T could give 2 ish's what HTC builds for them, they only care about their precious iPhone, everything else might as well be built to either get them laid or make them sammiches because AT&T is not the least bit interested in Android. Look at their crap line up of Android phones? Pathetic to say the least.

Also modifying the transmitter of any FCC Type Accepted device is against the law. Get caught you are looking at fines, and a possible prison sentence. The FCC seems to have a hissy fit when comes to anything Cellphone related.

[Q] Getting a Verizon Galaxy Nexus to work on Sprint...

This has become a pet project of mine, but I've found little information available online or on these forums. Is this something that is possible? Some Sprint reps say yes, others say no. The one who do say yes also iterate that you'll need to unlock it yourself, while the ones that say no seem to be newbies or rulebook-followers...which leads me to believe that it IS indeed possible, but with some work on the user's end.
So, has anyone moved a Verizon Android phone over to Sprint? If so, could you give me (and the many others looking for this) a walkthrough of the steps or where to go to research further?
Thanks a lot.

Not going to happen. The esn for the phone has to be in their database to activate the phone.
The only esns in that database are the phones that they sell.
Sent from my Galaxy Nexus

johnbibbs said:
The only esns in that database are the phones that they sell.
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Can this not be handled with a little social engineering?

DenzelChurchill said:
Can this not be handled with a little social engineering?
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No, the ESNs are in a computer database. If the rep enters an incorrect ESN or, in this case from their point of view invalid, the system will not move forward.
Even if that wasn't the case, I don't believe Verizon and Sprint operate on the same CDMA frequencies. Not to mention LTE. EVEN if that wasn't the case, the Galaxy Nexus pulls its subscriber information(like the phone number, data plan, etc) from its SIM card(just like GSM phones).
Sent from my Galaxy Nexus

It is impossible at this point. The ESN isn't the roadblock. I'll quote a post made on Phandroid from someone who has much more knowledge on the topic.
"It is physically impossible to activate the Galaxy Nexus on Sprint. The Galaxy Nexus (along with all Verizon 4G LTE phones) provision CDMA using a UICC that has a CDMA SIM program embedded on it. AKA, a CDMA SIM card. There is nowhere to flash to make it work on Sprint!
Even if Sprint were willing to allow non-Sprint devices on their network (which they are not), you're still missing the CDMA SIM card that Sprint has to provide. They aren't making those available until Q4 2012 along with the LTE smartphones. And even then, do you want to try arguing with Verizon to get the Galaxy Nexus SIM unlocked? It just isn't going to happen... And let's not forget Sprint uses a non-standard implementation of CDMA, just like Verizon. They aren't fully compatible on certain aspects, like the messaging channels in 1X."

DenzelChurchill said:
Can this not be handled with a little social engineering?
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MAYBE but probably not. You would have to know someone very high up at Sprint who is willing to risk their job for you.
Even then I'm not sure it's entirely possible because I think the 3G data services on this phone are authenticated through the LTE SIM card.
If that is not the case then you would have to figure out a way to program the Sprint PRL into your GN.
Bottom line I don't think it's possible.
Sent from my Galaxy Nexus

So this report is BS?
gottabemobile.com/2011/12/20/sprint-will-activate-verizon-galaxy-nexus-on-the-now-network

silow said:
It is impossible at this point. The ESN isn't the roadblock. I'll quote a post made on Phandroid from someone who has much more knowledge on the topic.
"It is physically impossible to activate the Galaxy Nexus on Sprint. The Galaxy Nexus (along with all Verizon 4G LTE phones) provision CDMA using a UICC that has a CDMA SIM program embedded on it. AKA, a CDMA SIM card. There is nowhere to flash to make it work on Sprint!
Even if Sprint were willing to allow non-Sprint devices on their network (which they are not), you're still missing the CDMA SIM card that Sprint has to provide. They aren't making those available until Q4 2012 along with the LTE smartphones. And even then, do you want to try arguing with Verizon to get the Galaxy Nexus SIM unlocked? It just isn't going to happen... And let's not forget Sprint uses a non-standard implementation of CDMA, just like Verizon. They aren't fully compatible on certain aspects, like the messaging channels in 1X."
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Hate to refry an old topic, but this is not completely true. The RAZR, RAZR MAXX, Droid 4, and Bionic have been flashed to Cricket. This means there is a way to get it on Sprint. Legally... no. Just as legal as non Boost phones on Boost.
The Nexus uses a VIA chipset and not Qualcomm. Not many people have actually poked around on the device to see if there is anywhere to save the programming.

[Q] Activating CDMA Verizon Nexus

I currently have a Samsung Charge and was wondering what would happen if I put my current SIM into a gnexus. would that allow me to use the phone or does it need to be activated by verizon?

Well, you won't be able to put the SIM in the Nexus because the Charge uses a full sized SIM and the Galaxy Nexus uses a micro SIM. However, it would work if you cut your SIM down.

imnuts said:
Well, you won't be able to put the SIM in the Nexus because the Charge uses a full sized SIM and the Galaxy Nexus uses a micro SIM. However, it would work if you cut your SIM down.
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I disagree, at least from what the man at the VZW store told me.. The SIM is for LTE only, this I know to be true. I was informed that I would have to call VZW to switch between phones. I specifically asked this question because I had always used GSM phones before where you could swap SIMs freely.

WiredPirate said:
I disagree, at least from what the man at the VZW store told me.. The SIM is for LTE only, this I know to be true. I was informed that I would have to call VZW to switch between phones. I specifically asked this question because I had always used GSM phones before where you could swap SIMs freely.
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Imnuts is correct. I switch devices all the time by moving my sim around. If it was LTE only, you could take it out and have at least voice service.

adrynalyne said:
Imnuts is correct. I switch devices all the time by moving my sim around. If it was LTE only, you could take it out and have at least voice service.
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Huh. So this is only true for LTE phones? If I buy another LTE VZW phone I can just swap the SIMs freely and I will have service just like with GSM phones? So that means the SIM is NOT for LTE only like I was informed at VZW?

WiredPirate said:
Huh. So this is only true for LTE phones? If I buy another LTE VZW phone I can just swap the SIMs freely and I will have service just like with GSM phones? So that means the SIM is NOT for LTE only like I was informed at VZW?
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Correct. As long as the sims are the same size, its a matter of drop it in and power up.
If not, you have to cut down your sim or use a micro to full adapter.

adrynalyne said:
Correct. As long as the sims are the same size, its a matter of drop it in and power up.
If not, you have to cut down your sim or use a micro to full adapter.
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Okay thanks. I know the people at the VZW store dont know everything but **** you would think they would know a simple thing like that. Hmm, just yesterday I was reading in a thread about data dropouts where the guy said it worked fine chen set to CDMA only but LTE cause dropouts, he said the solution was to get a new SIM and it has been working fine ever since. So the SIM has to do with CDMA and LTE. I am thinking about testing this with my buddies Droid2 Global.. Thanks again to both of you for correcting my misconception, I am pretty sure it is a widespread misconception too.

the LTE sim authenticates your phone to the network and registers it.
a coworker has a LTE ipad and he takes his SIM out of his phone and pops it into his ipad all the time and has internet access.

WiredPirate said:
Okay thanks. I know the people at the VZW store dont know everything but **** you would think they would know a simple thing like that. Hmm, just yesterday I was reading in a thread about data dropouts where the guy said it worked fine chen set to CDMA only but LTE cause dropouts, he said the solution was to get a new SIM and it has been working fine ever since. So the SIM has to do with CDMA and LTE. I am thinking about testing this with my buddies Droid2 Global.. Thanks again to both of you for correcting my misconception, I am pretty sure it is a widespread misconception too.
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Very widespread misconception. Verizon says you simply cannot do it. I've yet to meet a Verizon employee who has said otherwise, unless they are techno geeks.

adrynalyne said:
Very widespread misconception. Verizon says you simply cannot do it. I've yet to meet a Verizon employee who has said otherwise, unless they are techno geeks.
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the guy i got my phone from told me you could ask long as it was a LTE phone and the sim fit.
plus i tried it on my fiance's thunderbolt

adrynalyne said:
Correct. As long as the sims are the same size, its a matter of drop it in and power up.
If not, you have to cut down your sim or use a micro to full adapter.
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Cool beans, makes me want another LTE phone, to swap around on diff days. I dont know why I said I was gonna try it with my friends D2G, its not LTE, duh! This is very good to know and makes me really happy.

I swap my SIM between my Nexus and Charge sometimes (rarely) and it works fine. I have an adapter that I cut from an old SIM to use so the microSIM sits in the correct location. AFAIK, the LTE SIM takes care of activating the CDMA portion on it's own, allowing you to swap around as much as you like.

[Q] Note 8 LTE

There isn't a forum for the lte version so I'm asking the question here. Does anyone know if the AT&T version will use the same sim as the note2? I want to switch the sim between devices when I drive. A portable inet enabled nav system for my car.

Yes, it takes a micro sim. Same as the note II. Will come with a "warm sim" installed to support session based (prepaid) pricing as well.
update: I just swapped mine out and it won't latch in place... not sim related, as none of my sims snap in. Silly spring loaded sim slots......

oOamnesiaOo said:
Yes, it takes a micro sim. Same as the note II. Will come with a "warm sim" installed to support session based (prepaid) pricing as well.
update: I just swapped mine out and it won't latch in place... not sim related, as none of my sims snap in. Silly spring loaded sim slots......
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Weird. Do you think no microsim will fit? If it did, do you think you could use it as a giant phone on your car dash? It would be perfect as an internet connected car navigation replacement.

They fit perfectly. I just have one unit where the latch mechanism is messed up.
As far as the usage described... the AT&T variant does not function as a phone as configured. It is considered a connected tablet and no voice services are included in the stock software. That said, it makes a hell of a navi. You just wont be making standard cellular calls from it as well.
Sent from my HTC One using xda premium

oOamnesiaOo said:
They fit perfectly. I just have one unit where the latch mechanism is messed up.
As far as the usage described... the AT&T variant does not function as a phone as configured. It is considered a connected tablet and no voice services are included in the stock software. That said, it makes a hell of a navi. You just wont be making standard cellular calls from it as well.
Sent from my HTC One using xda premium
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That's too bad. I was hoping I wouldn't have to tether my gs4 to the tablet and use Skype and google voice with it maybe ill just wait for that Sony Xperia z ultra as my next phone. The note2 wasn't big enough to use effectively from my dash.

RCranium666 said:
That's too bad. I was hoping I wouldn't have to tether my gs4 to the tablet and use Skype and google voice with it maybe ill just wait for that Sony Xperia z ultra as my next phone. The note2 wasn't big enough to use effectively from my dash.
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You would be able to use skype if you have a data plan active on the Note 8.0. It is LTE and working great for me for 3 days now. Of course it would need its own data plan, or if you are on a Mobile Share plan it is only 10 bux to add to your existing data bucket. Not bad imho.

oOamnesiaOo said:
You would be able to use skype if you have a data plan active on the Note 8.0. It is LTE and working great for me for 3 days now. Of course it would need its own data plan, or if you are on a Mobile Share plan it is only 10 bux to add to your existing data bucket. Not bad imho.
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What service provider are you using for your LTE?

Interesting. I had the HK LTE version, and its SIM slot failed - not a latching problem - just started telling me the SIM card wasn't there after a couple of days.

RCranium666 said:
There isn't a forum for the lte version so I'm asking the question here. Does anyone know if the AT&T version will use the same sim as the note2? I want to switch the sim between devices when I drive. A portable inet enabled nav system for my car.
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As for same size (micro) yes. As for functioning...NO!! The Note 8 LTE will only function on data based sim cards. Such as a mobile Wi-Fi hot spot sim card.

Has anybody found any ROM's for the AT&T version yet?

Muffycheeks said:
As for same size (micro) yes. As for functioning...NO!! The Note 8 LTE will only function on data based sim cards. Such as a mobile Wi-Fi hot spot sim card.
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Are you sure a regular voice/data SIM won't just work for data only in the device? I really makes me angry that AT&T has all the phone stuff taken out. I want a tablet that I can use as a phone also. I may just buy the international version and not worry about LTE.

trikar21b said:
Has anybody found any ROM's for the AT&T version yet?
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Nope. You can't even root it yet. No one has bothered to find an exploit since so few people actually own an AT&T version right now. haha Even if it achieves wider adoption, let's be honest...tablets with cell connections are usually frowned upon by the XDA and other dev-friendly communities. They'll always be treated as second-class citizens around here because they have no hipster cred 'round these parts. If we were with the in crowd, we'd buy a WiFI-only model and just tether it to our phones. :silly: A lot of people in these communities just see absolutely no point to, and thus thumb their nose at, a tablet with an LTE connection. You can give them reason after reason why they're useful, but it falls on deaf ears more times than not.
Don't expect ROMs or root for the AT&T model until there are more people that actually own one.

rambo6 said:
Are you sure a regular voice/data SIM won't just work for data only in the device? I really makes me angry that AT&T has all the phone stuff taken out. I want a tablet that I can use as a phone also. I may just buy the international version and not worry about LTE.
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If you want it from the horse's mouth call AT&T store. As for me I went with the 5100 international version.

rambo6 said:
Are you sure a regular voice/data SIM won't just work for data only in the device? I really makes me angry that AT&T has all the phone stuff taken out. I want a tablet that I can use as a phone also. I may just buy the international version and not worry about LTE.
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Wouldn't that look really awkward walking around with an 8"tablet on the side of your face?
Sent from my Galaxy Note 8.0 using Tapatalk HD

"bluetooth headset".....

oldblue910 said:
Nope. You can't even root it yet. No one has bothered to find an exploit since so few people actually own an AT&T version right now. haha Even if it achieves wider adoption, let's be honest...tablets with cell connections are usually frowned upon by the XDA and other dev-friendly communities. They'll always be treated as second-class citizens around here because they have no hipster cred 'round these parts. If we were with the in crowd, we'd buy a WiFI-only model and just tether it to our phones. :silly: A lot of people in these communities just see absolutely no point to, and thus thumb their nose at, a tablet with an LTE connection. You can give them reason after reason why they're useful, but it falls on deaf ears more times than not.
Don't expect ROMs or root for the AT&T model until there are more people that actually own one.
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Truth. We all have our reasons which I'm sure is similar to each others. I don't want to drain my phone battery and subsidiary prices are nice too
Sent from my SAMSUNG-SGH-I467 using xda app-developers app

rambo6 said:
Are you sure a regular voice/data SIM won't just work for data only in the device? I really makes me angry that AT&T has all the phone stuff taken out. I want a tablet that I can use as a phone also. I may just buy the international version and not worry about LTE.
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The rep at my store said that I could change the sim over to a voice plan any time I want but it will cost more per month. $10 for the data only plan compared to $25 for the voice/data plan (like any other device). I don't see a point in spending the money until somebody figures out how to get calls working. He also said that the sim would still work in the tab after changing to a voice plan. The question is: is the hardware capable of supporting voice calls? If so, then I'm confident that somebody will figure out how fairly quickly.

DozenMadder said:
The rep at my store said that I could change the sim over to a voice plan any time I want but it will cost more per month. $10 for the data only plan compared to $25 for the voice/data plan (like any other device). I don't see a point in spending the money until somebody figures out how to get calls working. He also said that the sim would still work in the tab after changing to a voice plan. The question is: is the hardware capable of supporting voice calls? If so, then I'm confident that somebody will figure out how fairly quickly.
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No. The AT&T SGH-I467 model does not have the phone hardware and therefore is incapable of making calls. Look at a picture of the international 3G model and compare it to a picture of the AT&T model. You'll notice the AT&T model doesn't have an earpiece at the top like the international model does. You can use the AT&T model to make calls via VoIP services like Skype, but if you want to make calls over a cell network, you're out of luck. If that's a feature that you really, really need, then you'll have to buy an international unlocked 3G model.
As a side note, the official Samsung flip cover for the Note 8.0 is designed to fit all models worldwide. This means it has a cutout in the top for the earpiece that you find on the international 3G model. It looks a little hokey when you put it on the AT&T or WiFi-only models since there's nothing there to plug that hole.

rambo6 said:
Are you sure a regular voice/data SIM won't just work for data only in the device? I really makes me angry that AT&T has all the phone stuff taken out. I want a tablet that I can use as a phone also. I may just buy the international version and not worry about LTE.
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Click to collapse
oldblue910 said:
No. The AT&T SGH-I467 model does not have the phone hardware and therefore is incapable of making calls. Look at a picture of the international 3G model and compare it to a picture of the AT&T model. You'll notice the AT&T model doesn't have an earpiece at the top like the international model does. You can use the AT&T model to make calls via VoIP services like Skype, but if you want to make calls over a cell network, you're out of luck. If that's a feature that you really, really need, then you'll have to buy an international unlocked 3G model.
As a side note, the official Samsung flip cover for the Note 8.0 is designed to fit all models worldwide. This means it has a cutout in the top for the earpiece that you find on the international 3G model. It looks a little hokey when you put it on the AT&T or WiFi-only models since there's nothing there to plug that hole.
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Sorry, I wasn't very clear. By hardware I meant the radio side of things. I agree that the microphone and speaker are definately not configured for calls. Are you saying that you have reason to beleive that it is impossible to develop a way to place calls via bluetooth headset?

DozenMadder said:
Sorry, I wasn't very clear. By hardware I meant the radio side of things. I agree that the microphone and speaker are definately not configured for calls. Are you saying that you have reason to beleive that it is impossible to develop a way to place calls via bluetooth headset?
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Yes, people have tried to place calls and send native text messages. It appears that there is no usable radio hardware inside the device other than that which is required for data.
Now, it's possible that the hardware IS there but the baseband firmware simply disables it, but there's no proof of that. Unless we could hack the radio firmware somehow (not likely) or do a teardown of the tablet, we'll never know for 100% sure. But, as things sit right now, you will neither be able to make phone calls of any kind, nor be able to send native text messages to or from the tablet, at all with an SGH-I467 AT&T model because either there's no radio hardware or the I467UAMDF radio software has disabled the phone hardware entirely.

[Q] Is there any way to use the Tmobile S4 on Verizon?

Is there any way to use an unlocked tmobile s4 on verizon???? Can you flash a certain modem to make it work?
Sent from my SCH-I535 using Tapatalk 2

No. GSM phones are incompatible with CDMA networks.

verizon
I have a stock sgh-m919 and I gave my imei to Verizon over the phone, they stated they could not use my phone on a prepaid plan, but I did not inquire about a contract plan. Visit a store and ask questions.
I realize Verizon is CDMA, but I have seen those radio ROMs somewhere to change the frequency of the radio. I think it would require more than that, perhaps even an imei change, I don't really know, I'm just going out on a limb here.
From what I understand Verizon does use the 700Mhz band like AT&T but they use a different portion of the band, the upper is what I read. Google 700Mhz LTE, I think that it will come up.
good luck, let me know how that turns out.
Also, my mother has a Iphone 4S on Verizon and although I don't really like apple products, I do know that it has a sim card slot, so that taken into consideration, perhaps there is hope.

inspectergadget said:
I have a stock sgh-m919 and I gave my imei to Verizon over the phone, they stated they could not use my phone on a prepaid plan, but I did not inquire about a contract plan. Visit a store and ask questions.
I realize Verizon is CDMA, but I have seen those radio ROMs somewhere to change the frequency of the radio. I think it would require more than that, perhaps even an imei change, I don't really know, I'm just going out on a limb here.
From what I understand Verizon does use the 700Mhz band like AT&T but they use a different portion of the band, the upper is what I read. Google 700Mhz LTE, I think that it will come up.
good luck, let me know how that turns out.
Also, my mother has a Iphone 4S on Verizon and although I don't really like apple products, I do know that it has a sim card slot, so that taken into consideration, perhaps there is hope.
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A Verizon model will work on T-Mobile, just not the other way around :/

chubbrock said:
Is there any way to use an unlocked tmobile s4 on verizon???? Can you flash a certain modem to make it work?
Sent from my SCH-I535 using Tapatalk 2
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Well I've been traveling for a while now with T-Mobile service with my T-Mobile s4 *cough* *unlocked* *cough*, and it does pick up Verizon service and I am able to call and text due to the agreements the carriers have. So I don't see why not. And as to activating any phone on Verizon prepaid, you can't .only have the options they have.
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4 Beta