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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Click to collapse

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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Click to collapse
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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Click to collapse
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.

Radio question: LTE or no LTE-capable, MSM8960??

So earlier there was confusion whether the T999 had the processor for LTE or was gimped. We've seen conflicting reports from T-Mobile, who claimed it is gimped and doesn't have LTE, but at Target Mobile, the T-Mobile GS3 is advertised as "4G LTE coming soon," and some think the LTE radio is simply disabled. I did the stat check app, and it did list the MSM8960. Has anyone found out the truth yet? CS from T-Mobile told me on the phone its getting LTE via OTA next year.

I believe this screenshot answers your question.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my SGH-T999 using Tapatalk 2

The T999 does NOT have an LTE radio, or at least it is disabled in microcode (hint: we ain't changing it). Qualcomm can and does have different versions of the S4 family of SOCs identified as an MSM8960. It is more accurate to refer to the SOC as an S4 Plus, which has many different variations, the main differences being modem configurations. The T999 actually has the MSM8260A (using the older terminology), which is basically the MSM8960 without the LTE modem. This can be verified by looking at some getprop parameters. Most software is just going to show you MSM8960, which is the board name/type, etc.
See here for more info: https://developer.qualcomm.com/sites/default/files/snapdragon-specs.pdf

babymatteo said:
I believe this screenshot answers your question.
Sent from my SGH-T999 using Tapatalk 2
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how did you get that? So this means our phone might be LTE capable?

how did you get that? So this means our phone might be LTE capable?
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Click to collapse
No. Just because it is in a software menu does not mean it is supported in hardware. Try to use it on AT&T LTE, then come back and let us know how that worked out.

Thank you
kmdub said:
No. Just because it is in a software menu does not mean it is supported in hardware. Try to use it on AT&T LTE, then come back and let us know how that worked out.
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Thank you for being such a good helper to people like myself who are roaming the forums trying to learn and understand everything the best that I can. You are very informative, just wanted to point it out to you.
Thanks again,
~Aqua :good:

No problem. I hope you got the information you needed.

kmdub said:
The T999 does NOT have an LTE radio, or at least it is disabled in microcode (hint: we ain't changing it).
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Click to collapse
What do you mean "disabled in microcode?" If it is that, could an OTA fix it? I've heard about MSM8960 vs MSM8260a but not only have several T-Mobile reps told me over the phone that that phone will get LTE, but one of their live national sales reps told me it will to my face, and I work at a retailer which sells T-Mobile alongside AT&T and Verizon.
Sent from my SGH-T999 using xda app-developers app

DiamondJay20 said:
What do you mean "disabled in microcode?" If it is that, could an OTA fix it? I've heard about MSM8960 vs MSM8260a but not only have several T-Mobile reps told me over the phone that that phone will get LTE, but one of their live national sales reps told me it will to my face, and I work at a retailer which sells T-Mobile alongside AT&T and Verizon.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
I had a Samsung rep at a T-Mobile store (the day I bought the phone) tell me it is LTE capable when T-Mobile flips the switch. So basically take that how you want to. I'm taking it with a grain of salt, but hope that it is true . Would be nice to be one of the first people to actually use T-Mobile's new LTE Advanced Network. Its going to fly!
Sent from my SGH-T999 using xda premium

nory82688 said:
I had a Samsung rep at a T-Mobile store (the day I bought the phone) tell me it is LTE capable when T-Mobile flips the switch. So basically take that how you want to. I'm taking it with a grain of salt, but hope that it is true . Would be nice to be one of the first people to actually use T-Mobile's new LTE Advanced Network. Its going to fly!
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
not to mention the current version of LTE, 3GPP release 8, isn't technically 4G either, so this is awesome if its true. LTE Advanced is supposed to be the first "true" 4G." These conflicting reports are starting to bother me. But either way, even HSPA+ is far, far better than any regular 3G, especially CDMA 3G, which is snail slow.

the jelly been leak has LTE enabled in it so i think its coming with JB. shows it right in choose network mode.

Look up microcode on Google or read the Wikipedia article. That would be a good start. It is how processors are programmed, and no, an OTA will not change it. FYI, I don't know if that is specifically done with this SOC, I am just saying that features (seemingly hardware features to end users) can be changed with microcode. It may just not have the actual silicon. I don't know. Either way, from our perspective, it doesn't have an LTE radio.
The T-Mobile reps are wrong, at least for the phone that was just released. Simple as that. Now, there could be a hardware version update, or subsequent newer model released with the LTE radio. Certainly is possible, though it would likely have a slightly different model number, or be easily identifiable some other way.
I know you guys want the T999 to have an LTE radio. But, no matter how much you want it, that won't change the facts. The phone we have now doesn't have it. It's just one of those things that we will have to wait and see. Then we can come back and say, told you so. In fact, there is a JB update out now for the T999. Why doesn't someone flash that and try it out? Seriously, out of all the T999 phones sold, do you know ANYONE using LTE on it, whether on AT&T or elsewhere? If you do, please tell him/her to speak up. Think about it. Surely someone on these boards is an AT&T customer with a T999. It's not going to be "enabled" with an OTA...

avengethis1 said:
the jelly been leak has LTE enabled in it so i think its coming with JB. shows it right in choose network mode.
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Click to collapse
The other person had a screenshot of this too. Just because it's there doesn't mean the hardware supports it. Why would it come with Jellybean when T-Mobile's LTE network won't even be out for months, maybe even a full year at the rate their refarming is going? And why would it even be ENABLED?
Also, everyone needs to STOP LISTENING to reps. Reps don't know anything more than most people who can use Google.

Also, everyone needs to STOP LISTENING to reps. Reps don't know anything more than most people who can use Google.
Click to expand...
Click to collapse
This has certainly been my experience, and is not limited to just T-Mobile. I had one rep tell me with a straight face that the OS on a Galaxy S Blaze 4G was not in fact Android, but rather a custom OS and skin designed by Samsung...lol Yeah...sort of... And there was the time that one swore up and down that GSM (2G old school GSM, not UMTS/HSPA) was superior to CDMA...for reasons he could not possibly explain except to say that...well it must be better since the rest of the world uses it.
Don't get me wrong, I know there are some bright and knowledgeable reps working for T-Mobile and others.

kmdub said:
Don't get me wrong, I know there are some bright and knowledgeable reps working for T-Mobile and others.
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Click to collapse
Of course there are, but by and by, most reps don't know **** about anything.

could it be that T-Mobile's version of LTE Advanced will be compatible with whatever is inside the T999? This isn't just one rep who's told me its gonna have LTE, but several both live and on the phone.

DiamondJay20 said:
could it be that T-Mobile's version of LTE Advanced will be compatible with whatever is inside the T999? This isn't just one rep who's told me its gonna have LTE, but several both live and on the phone.
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No. It just isn't going to happen, and their LTE Advanced network is a long time away.
If several people live and on the phone told you to jump off of a bridge, would you do it? Not to mention the fact that most of their phone reps are outsourced call centers that also know nothing.

not sure if it matters but a friend of mine used his upgrade to get the s3 on att. now I'm not sure what they claim or if there phone is different than out tmob version but i can say that i did hold his phone and ran a speed test while the icon in the status bar showed LTE, it maxed at about 36meg d/l. later that night at one of our other friends house the icon showed 4G so i ran speedtest again and it stayed between 11meg to about 18meg. reading one of the above comments about the att version just got me thinking about that so i figured id tell what ive seen hoping it would help in any way
Sent from my SGH-T999 using xda app-developers app

could it be that T-Mobile's version of LTE Advanced will be compatible with whatever is inside the T999? This isn't just one rep who's told me its gonna have LTE, but several both live and on the phone.
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Click to collapse
No. Whatever it is inside the T999 is not LTE. So, no version of LTE will be compatible with it. I understand optimism, but wow... No joke, the T-Mobile Galaxy S3 does not have LTE. I wouldn't be so disappointed though since HSPA is no slouch and still has a bit of room to grow. I actually think the approach T-Mobile took with their network advancements makes a lot of sense. Not saying it is the best marketing strategy.
Seriously, there are people on this forum that have the T999 on AT&T. No LTE. Just find them, ask them, confirm. And no, it is not coming in an OTA. It will only come in a different version of the phone (quite possible). The phone you have in your hand now will not magically be updated to LTE. While UMTS/HSPA and LTE are actually not as different as most may think (same standards family, both decedents of GSM), they are still different and require specific hardware. There are technical differences.
FYI, the AT&T version of the phone IS different than the T999, that's why he gets LTE.

To the guy that took a screenshot. Look! It says CDMA! I can use this on Sprint and Verizon then right?!?!?!? :thumbdown:
Sent from my SGH-T999 using Tapatalk 2

*WIP* Making a Sprint galaxy S3 sim card compatible.. *update / installed*

The Goal is to let a L710 sim card compatible. (global capable)
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12/24
I installed a few verizon roms. I can change the network setting, but always get an error when i search for net works.
I only have 2 sim cards to test it out so I am not sure if there are bad sims. One is verizon LTE and onther is from an overseas gsm carrier tigo.
What more can I do with out bricking my phone?
I added some screen caps.
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12/6
I finally received the part from china. I installed it fairly easily. I did have to cut the back cover and pat of the metal plate from the reader.
Sd card works and reads fine. I only have have a verizon LTE and a tigo sim card to try it out So I am going to try flashing different roms soon, I am on Blazer. Nothing seems to happen when the verizon sim is inserted.
you are still be able to use sprint LTE, since the sprint sim is built into the main board and not the sd/sim reader.
Any have advise on how i can check if it know a sim card is inserted?
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I was searching ebay for parts and I found this.
http://www.ebay.com/itm/SIM-SD-Card...341?pt=LH_DefaultDomain_0&hash=item2575c1e915
It should be as easy as unplugging the old one and plugging in the new one. You would also need to get a verizon back plate. But this phone is super easy to open and change parts, minus the screen.
You will lose LTE, unless there is some way to get a sim from sprint (the Iphone 5 has one).
Does anyone know a res eon this will not work? I plan on ordering one later today.
Thanks

ranchosteve said:
The Goal is to let a L710 sim card compatible.
I was searching ebay for parts and I found this.
http://www.ebay.com/itm/SIM-SD-Card...341?pt=LH_DefaultDomain_0&hash=item2575c1e915
It should be as easy as unplugging the old one and plugging in the new one. You would also need to get a verizon back plate. But this phone is super easy to open and change parts, minus the screen.
You will lose LTE, unless there is some way to get a sim from sprint (the Iphone 5 has one).
Does anyone know a res eon this will not work? I plan on ordering one later today.
Thanks
Click to expand...
Click to collapse
This seems pretty ambitious! I can't wait to see what develops

Quick question... Why?
Sprint LTE uses a different frequency than every other major carrier. You're not going to pop in an AT&T (or any other) card and use their LTE, and you'd still be tied to Sprint CDMA unless I'm mistaken.

NeoMatrixJR said:
Quick question... Why?
Sprint LTE uses a different frequency than every other major carrier. You're not going to pop in an AT&T (or any other) card and use their LTE, and you'd still be tied to Sprint CDMA unless I'm mistaken.
Click to expand...
Click to collapse
I believe he stated his goal is to put a SIM slot in his s3. No where did he mention AT&T or using it for any other companies. He said he would need a Sprint SIM, and no others. He did say something about a Verizon backplate though
I believe you must have left the Matrix Neo, you're not on your toes
Edit: Oops, didn't see the "JR". You're still in training
Sent from my White Galaxy s3 by Sprint

What is the point? Most carriers that use SIM cards(if not all) use GSM radios. This phone has CDMA radios, so it wont pick up the signal.

shiftr182 said:
What is the point? Most carriers that use SIM cards(if not all) use GSM radios. This phone has CDMA radios, so it wont pick up the signal.
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Click to collapse
I can see it's pointless for most. But for those who travel and don't wanna pay sprint ridicules roaming rates, like me. It does have a cdma radio but the LTE part of the phone has gsm capabilities like the Verizon version.
It's more of proof of concept more than anything.

The Sprint SGSIII uses a RUIM that is hardwired to that board. A RUIM can do what a SIM can do as well as handle CDMA subscriber information. An early manual for the Sprint SGSIII showed instructions for SIM removal/installation, but it was changed before launch to be a non-removable component. Likely why the phone was delayed; they changed their minds on making it a fully-fledged World Phone in lieu of other models like the new Photon.
Sent from my SPH-L710 using xda premium

its next to impossible to get a sim card for the iphone5...

The S3 would have to have another Radio hardware installed to be what you are talking about as in Travel.
That's one of the Cool features on my line 2, Motorola Photon.....World Phones is what they are called.....Sim cards most useful purpose is to move data from one phone to another, contacts etc..

I spent hours researching this as well, not to try and enable GSM for global roaming, but to maybe, possibly get LTE from Cricket working. I looked at a few pictures of the main board from Ebay auctions, and while I think it's possible to do what the OP is proposing, our main board is not the same as other GS3s. I'm no expert, but the components that are under the microSD and cover plate aren't the same, even compared to a Verizon board. On top of that, the embedded SIM card is located on the skinny side that runs up the side of the phone, next to the battery.
I can't say with certainty, since I haven't scoured every single thread on the subject, but I haven't seen anyone provide the ability to bypass the embedded SIM. Well, maybe they did when they hacked the Photon. As far as the radio goes, it would seem that flashing new radio firmware might work to get the radio operating at the right frequency. Again, I make no real claims on this, as I'm no expert. LOL But from the info I can find, the radios are the same, at least on the dual core variants across the board, and are controlled by firmware. So, in the OP's idea, this would be less than ideal, unless someone could write a custom radio version that would retain CDMA voice and EVDO data for Sprint, as well as pointing the LTE/GSM side to the appropriate frequency.
Looking at Sprint's Galaxy Note 2, the embedded SIM looks to actually be on the metal cover that houses its microSD slot, so at least that part of the equation seems like it would be easier to accomplish with that phone.
For my part, I figured that even if Cricket would allow me to buy an LTE SIM and attach it to my ESN in their system, it would still be a major pain to try and overcome the embedded SIM hurdle.
In closing, I hope that no one interprets my ramblings as me being negative. When I saw the Photon hacked, I quickly realized that it was well beyond my comfort zone seeing as I don't have the funds to replace my phone when (Not if!) I destroyed it! I'm sure that it could be possible, especially given the talent of a lot of the members of XDA. I just wanted to put in my 2 cents, and point out that there is a lot more involved than just plugging in a new component and popping in a SIM card. Hopefully people here will rip apart my thoughts and prove me wrong, as I am very interested in trying to convert my phone to use Cricket's LTE.

Why not just get a Verizon gs3 ?
Sent from my SPH-L710 using xda premium

It works on the Photon? If I'm not mistaken that came with a dual freq radio I think.
Sent from my SPH-L710 using xda app-developers app

any updates?

why not just get a gsm gs3?

first post update.

illusionistpro said:
why not just get a gsm gs3?
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have you SEEN what S3's sell for ? yeah that's why hehehe

Jesus Christ fix the title of this thread already.
Sent from my SPH-L710 using XDA Premium HD app

how about a verizon gs3 port
would you think a verizon gs3 port to sprint gs3 will work being that phone is a world phone? i think it is..

a Sim toolkit is included in /system/app/
All you need i a launcher or an app that lets you create shortcuts to Activities, and you can then point it to the Sim Toolkit.

O I c...
Sent from my SPH-L710 using xda premium

[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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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