Develop Bugs

[Q] (Q) Nitro HD on other networks?

So I know it obviously works on AT&T network but will it work on Verizon, T-Mobile or sprint?
Tmo only gets edge for me. Wondering if its compatible on other networks. Any workarounds I'm missing?
Have a feeling I'm stuck to att if I want 3g 4g... =[

That's correct. Only T-Mobile uses the GSM network that AT&T uses, but they use them on different bands so the high-speed data is typically only going to work on one network or the other. Sprint uses EVDO and Verizon uses CDMA (if I remember correctly), so phones for each of those networks will ONLY work on that network.

I tested my unlocked Nitro on an H20 wireless sim (which just piggybacks ATT) and it worked fine. The icon was even SAYING. I had 4G. A lot of 3rd party wireless companies are still using att technically, but great as a cheaper data alternative that avoid contracts.
I plan on using this phone off contract with a carrier like that once my Verizon deal expires in February.
Hope that helps.
Sent from my LG-P930 using XDA App

SolusCado said:
That's correct. Only T-Mobile uses the GSM network that AT&T uses, but they use them on different bands so the high-speed data is typically only going to work on one network or the other. Sprint uses EVDO and Verizon uses CDMA (if I remember correctly), so phones for each of those networks will ONLY work on that network.
Click to expand...
Click to collapse
Evdo is there 3g. Sprint and Verizon are both cdma
Sent from my SAMSUNG-SGH-I777 using XDA App

hyelton said:
Evdo is there 3g. Sprint and Verizon are both cdma
Sent from my SAMSUNG-SGH-I777 using XDA App
Click to expand...
Click to collapse
Does anybody notice that Verizon is now using a Sim card, just like AT&T and T-Mobile? That's because their LTE network runs on the Sim Card and not built into the phone, like CDMA...
So technically, yes, you may be able to insert a verizon LTE card into your phone, and it might work, but you most definitely won't get their LTE connection.
You know what, I should try this at work tomorrow. My coworker has a Rezound. we can switch Sims and see if it works on both phones.

Make sure you have the proper LTE APN settings for each carrier or you won't see LTE or squat!

LOL!! I forgot about that. thx Repherb.

Verizon Note 2 Vs. T-Mobile Note 2

Which Note 2 supports more networks and frequencies; and therefore, which would be more suitable for international travel. Is the Verizon Note 2 even pentaband?

T mobile version because it's gsm which is going to work overseas. Verizon is a CDMA and I haven't read that it has gsm support.
Sent from my SGH-T889 using xda premium

Rhiannon224 said:
T mobile version because it's gsm which is going to work overseas. Verizon is a CDMA and I haven't read that it has gsm support.
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Yup, the T-Mobile version will work in more places overseas -- Especially Europe. Just in case, you might want to ask this in the Verizon area also just to make sure. :good:

I'm confused because on Samsungs website, http://www.samsung.com/us/mobile/cell-phones/SCH-I605TSAVZW-specs
the Verizon Model has the GSM frequencies,
is it GSM if unlocked; i believe the Note 2 is already unlocked by verizon, will it work on GSM frequencies internationally?
correct me if I'm wrong, thanks

the verizon Galaxy Note II apparently has the GSM radios,
also has LTE; doesn't AT&T LTE work along same frequencies as verizon LTE
or is the verizon LTE exlusively to CDMA?

All Galaxy Note 2 devices seem to have all WCDMA, GSM, and LTE bands.
But what I understand is that Verizon version is considered as a "world" phone. I know that they tell me that I can use their Galaxy Note 2 on the European Networks.
I have played around with the bands on my T-Mobile Galaxy Note 2 and can get the WCDMA and LTE working. So I don't know if the Modem firmware in all Galaxy Note 2 are the same and just need to be activated by the carrier's sim card or not. Someone please educate us on the this. I know that their is talk of needing OTA update to activate the LTE within T-Mobile GN2. But if the Modem is all the same then can just updating or exchanging the sim card could do the same? Or does the nv file also needs to be updated to activate the band/s as well?
The question is not if Galaxy Note 2 (all verisons) have the bands. But how to (the actual process) activate the band, in question, and get the Galaxy Note 2 in working order with the carrier of choice? What is the method? How to do the process of this method?
Please correct me if I am getting this wrong.

^ good point, and also just to ask about the verizon note 2 again, i thought it carries carries an an additional radio for CDMA, does this mean that the verizon note 2 model has better capabilities worldwide' since it is virtually compatible with all networks in the world (simply tweaks to the frequencies to the radio can get the verizon variant working virtually anywhere) please correct me if I'm wrong here. thanks

N/m ...
Sent from my SGH-T889 using Tapatalk 2

Problem I have seen in the past with Verizon world phones is that the game frequencies only work overseas. And lte is gsm band. Which is one of the few reasons Verizon phones have a sim slot to begin with
Sent from my SGH-T889 using xda app-developers app

All recent Verizon LTE phones have GSM radios built in as well as their own CDMA/LTE radio. The LTE radio is only compatible with their network.
Some of these phones are even shipped out of the box unlocked and can be used immediately on GSM networks in the U.S.
If you do get the Verizon Note II and want to use it on T-Mobile, it will not have support for their HSPA+ 42mbps network, I believe it maxes out at 21mbps, as with all other Note II's around the world except for T-Mobiles.

But doesn't Verizon use LTE on the 700 band just like AT&T and future TMobile LTE?
http://en.wikipedia.org/wiki/List_of_LTE_networks
Please correct me if I'm wrong, thank you.

nerdydesi said:
All recent Verizon LTE phones have GSM radios built in as well as their own CDMA/LTE radio. The LTE radio is only compatible with their network.
Some of these phones are even shipped out of the box unlocked and can be used immediately on GSM networks in the U.S.
If you do get the Verizon Note II and want to use it on T-Mobile, it will not have support for their HSPA+ 42mbps network, I believe it maxes out at 21mbps, as with all other Note II's around the world except for T-Mobiles.
Click to expand...
Click to collapse
So the Verizon Note2 is like the AT&T Note2 & Sprint Note2 (supporting 21Mbps HSPA+ but not 42Mbps like T-Mobile) but all only with their own respective LTE?..wouldn't it be more cost effective for Samsung just to make 1 phone with all the hardware to support all (isn't the iPhone5 like that now?) or is it cost prohibitive or do carriers not want to make it easier to unlock?
Are we still confident that the T-Mobile Note2 is the best if we want the flexibility to use on all carriers? How often is >21Mbps HSPA+ seen in real world use & why is the disabled LTE not listed at http://forum.xda-developers.com/forumdisplay.php?f=1877 ?

So, which is better then, Verizon or T-Mobile? Verizon's Note 2 also includes a CDMA radio whereas the T-Mobile version does not. If you are using the Note 2 in the US, wouldn't you have more flexible options in terms of which carrier to use?

nerdydesi said:
All recent Verizon LTE phones have GSM radios built in as well as their own CDMA/LTE radio. The LTE radio is only compatible with their network.
Some of these phones are even shipped out of the box unlocked and can be used immediately on GSM networks in the U.S.
If you do get the Verizon Note II and want to use it on T-Mobile, it will not have support for their HSPA+ 42mbps network, I believe it maxes out at 21mbps, as with all other Note II's around the world except for T-Mobiles.
Click to expand...
Click to collapse
So do we consider the Verizon Note2 even more carrier flexible than T-Mobile's Note2 (as I was about ready to buy the T-Mobile Note2 to try their $30/mo plan but now having some doubts..if I want this tomorrow I need to order soon) ?
-Thnx

Well LTE On the Verizon Note 2 is only compatible with Verizon's Network. Even if unlocked; the phone's firmware only recognizes LTE if only the Verizon 750 band is detected. Verizon has its own exclusive LTE bands compared to AT&T and Future T-Mobile LTE (sharing the same LTE bands)
SMARTPHONEPC said:
So do we consider the Verizon Note2 even more carrier flexible than T-Mobile's Note2 (as I was about ready to buy the T-Mobile Note2 to try their $30/mo plan but now having some doubts..if I want this tomorrow I need to order soon) ?
-Thnx
Click to expand...
Click to collapse

I cannot speak to the CDMA radio issue, but I am positive that Verizon LTE will not work with any GSM LTE phone. The frequencies are similar, but Verizon is using a different LTE protocol. I asked that question a long time ago, thinking that LTE would finally allow roaming between Verizon and AT&T, but they are too clever to allow such a democratic system to function. They will remain fundamentally incompatible, not because they need to be, but because they want it that way to keep you locked to your carrier by your choice of device. Nice, eh?
Sent from my SGH-T889 using xda app-developers app

The Verizon NoteII will (in theory) connect to any gsm carrier. How to do so, I don't know.
Sent from my very "non-stock" TP.

^^^ Well, the Verizon Note 2 will not be able to work with another carrier's LTE than itself.

my experience
Hey folks,
I've got the Verizon Note 2 and I love it. If you're willing to unlock the bootloader and then install a hack onto your device, you'll easily be able to swap the SIM card out and use it just about anywhere. Yes, the phone is carrier unlocked (not the same as bootloader unlocked). The issue is that in the settings, they won't let you add the specific APNs for the carriers you need. I"m not sure how else to get around that without installing some of the hacks. I managed to do it and it works beautifully on Canada's Bell Mobility, HSPA+ is screamingly fast and the LTE on VErizon in the States is just insanely fast. My recommendation: get the Verizon version because they've built out their LTE much more than their rivals at this point.

On anantech the reviewer stated that the tmobile version would be the most compatible. If you get vzw note2 and switch you wont get lte on tmob or att. Quite frankly vzw is too expensive and the coverage from tmobile is getting better by the month. Not to mention their business pricing is better than any of the other carriers.

[Q] Unlocked AT&T phones can verizon sim be used?

I am looking to purchase an AT&T Galaxy Note 2 and need the following question answered... I am aware of the unlock link http://forum.xda-developers.com/showthread.php?t=2014982 that uses the method of dialing the following keys *#197328640# but here is my concern... Does this method allow you to use a Verizon Sim as if you had purchased a Verizon Galaxy Note 2? In other words does it unlock the CDMA band also?
Thanks for any correct information...

The Adversary said:
I am looking to purchase an AT&T Galaxy Note 2 and need the following question answered... I am aware of the unlock link http://forum.xda-developers.com/showthread.php?t=2014982 that uses the method of dialing the following keys *#197328640# but here is my concern... Does this method allow you to use a Verizon Sim as if you had purchased a Verizon Galaxy Note 2? In other words does it unlock the CDMA band also?
Thanks for any correct information...
Click to expand...
Click to collapse
If im correct verizon and at&t use completely different frequency bands.
Sumone please correct me if im wrong
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Until vzw goes to VoIP in the next few years the only thing the sim supports is 4g data. Because lte is a gsm based network, sim cards are needed. Nothing else in a Verizon phone used the sim so no you would not receive full service using a vzw sim. Not sure if you'd receive data or not but I'm betting no

Verizon uses CDMA for voice, and CDMA/LTE for data. Not only are the LTE frequencies incompatible, but CDMA is incompatible as well. So no, the Note 2 will not work AT ALL on Verizon.
Also to note, Verizon will only let you activate VERIZON BRANDED phones on their network. You can't buy unlocked phones and use them like a GSM carrier (AT&T, T-Mobile in the US) would. Sprint is the same way.

entropism said:
Verizon uses CDMA for voice, and CDMA/LTE for data. Not only are the LTE frequencies incompatible, but CDMA is incompatible as well. So no, the Note 2 will not work AT ALL on Verizon.
Also to note, Verizon will only let you activate VERIZON BRANDED phones on their network. You can't buy unlocked phones and use them like a GSM carrier (AT&T, T-Mobile in the US) would. Sprint is the same way.
Click to expand...
Click to collapse
Ok, so if I purchased a Verizon Galaxy Note 2, and rooted it, I could then use AT&T and later if I finally want to switch over to Verizon, I could... If I am mistaken about this, please let me know. Because I am trying to get a Galaxy Note 2 that will work with both GSM carriers and also work with Verizon when/if I choose to switch.

No. Verizon and AT&T phones/networks are not compatible with each other at all.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

The Adversary said:
Because I am trying to get a Galaxy Note 2 that will work with both GSM carriers and also work with Verizon when/if I choose to switch.
Click to expand...
Click to collapse
This does not exist on ANY Note 2 on earth. Possible with *SOME* other phones, but not any Samsungs, and definitely more trouble than it's worth. NONE will be LTE compatible though. 99% of the GSM compatible phones on Verizon are locked on only work internationally, and will not work AT ALL for the US.

entropism said:
This does not exist on ANY Note 2 on earth. Possible with *SOME* other phones, but not any Samsungs, and definitely more trouble than it's worth. NONE will be LTE compatible though. 99% of the GSM compatible phones on Verizon are locked on only work internationally, and will not work AT ALL for the US.
Click to expand...
Click to collapse
I've been wondering about this. Can't the Verizon "international" phones be unlocked, then used with a US SIM?

entropism said:
This does not exist on ANY Note 2 on earth. Possible with *SOME* other phones, but not any Samsungs, and definitely more trouble than it's worth. NONE will be LTE compatible though. 99% of the GSM compatible phones on Verizon are locked on only work internationally, and will not work AT ALL for the US.
Click to expand...
Click to collapse
"Yes. Verizon GN 2 on AT&T network. Phone is rooted. AT&T APN added with APN Manager Pro. Decent speeds too with just 2 bars. Sent from my SCH-I605 using Tapatalk 2"
Just pulled this off of a different thread... http://forum.xda-developers.com/showthread.php?t=2044449
Seems like the Verizon GN2 can do AT&T with data, as long as you rooted and adjust the APN file. If this is incorrect please let me and the rest of the form know how or why this is incorrect....

The Adversary said:
"Yes. Verizon GN 2 on AT&T network. Phone is rooted. AT&T APN added with APN Manager Pro. Decent speeds too with just 2 bars. Sent from my SCH-I605 using Tapatalk 2"
Just pulled this off of a different thread... http://forum.xda-developers.com/showthread.php?t=2044449
Seems like the Verizon GN2 can do AT&T with data, as long as you rooted and adjust the APN file. If this is incorrect please let me and the rest of the form know how or why this is incorrect....
Click to expand...
Click to collapse
I already said data "could" work. That'd not the issue. Getting everything to work is what seems to be unlikely. Different frequencies for voice/text.
Sent from the quad core monster in my pants

Any new Verizon phones can work on any GSM HSPA+ network with some trickery or are unlocked out the box. Some phones work on At&T and T-mobile while others only work with carriers outside the U.S. YMMV.
http://www.theverge.com/2012/9/25/3405610/verizon-iphone-5-unlocked-open-access-fcc
A guy has it working on AT&T.
http://forum.xda-developers.com/showthread.php?t=1905016&page=5

[Q] Cel-Fi Signal Booster + Verizon S4 + TMobile Sim Card = HELP

Hey Guys,
Not sure where to ask at this point, but I know that there is a Verizon forum for the S4, but this is more T-Mobile inclined question.
My mom was given an S4 at her job from Verizon but I convinced her to give it to me since I wanted it and I gave her my Tmobile Note 2.
I put my sim card into the Verizon S4 and configured the APN setting so now im getting faster data speeds with the Verizon S4 than I was with my Tmobile Note 2. So everything works but the phone is in Global mode, which I dont really care at this point.
My question is though, how can I get the Verizon S4 to connect to the Tmobile signal cel-fi booster that I have. I have no service at my job so therefore I obtained one of the boosters offered by Tmobile, works great with my Note 2, but the S4 does not recognize the cel-fi booster.
Please advise...

I guessing the cell fi thing is for tmobile phone only. I'm sure tmobile don't want just anyone to use their products.
It's probably a firmware deal and not the SIM that recognized the cell fi.
☞ Sent from here☜???

Yes, I definitely understand that, but I am using a TMobile sim card, logged into Tmobile towers, using Tmobile 4G LTE network, but the hardware/firmware is Verizon, so that is why I am asking if it is doable to get this working? Perhaps if flashing a rom or something?

elite-fusion said:
Yes, I definitely understand that, but I am using a TMobile sim card, logged into Tmobile towers, using Tmobile 4G LTE network, but the hardware/firmware is Verizon, so that is why I am asking if it is doable to get this working? Perhaps if flashing a rom or something?
Click to expand...
Click to collapse
Could it be a hardware issue? Tmobile special band which does noy jave in the verizon phone?
Sent from my SGH-M919 using xda premium

I don tknow, thats why im asking you guys lol

elite-fusion said:
I don tknow, thats why im asking you guys lol
Click to expand...
Click to collapse
Your best bet is to call T Mobile tech support and ask them. You've got a really obsscure question that probably has to deal with the frequencies the 2 devices communicate on that no one here has probably ever dealt with. T Mobile is going to be the quickest way to get this answer.

The T-Mobile cel-fi operates at the 1700MHz aws frequencies. According to this thread they are not enabled by default on the Verizon galaxy s4. So that's why it's not picking up the signal from the cel-fi.
Sent from my SGH-M919 using Tapatalk

Cel-Fi RS1 vs RS2
elesbb said:
The T-Mobile cel-fi operates at the 1700MHz aws frequencies. According to this thread they are not enabled by default on the Verizon galaxy s4. So that's why it's not picking up the signal from the cel-fi.
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Guys,
I work for Cel-Fi - it looks like you are correct.
The RS2 Cel-Fi (the latest one) will boost 2 bands: 1.9GHz (aka PCS, Band 2) + AWS
BUT the older RS1 (we dont sell it anymore) will only boost AWS and not Band 2...
Check here for details on the Bands 2 and 4, and here for definitions of the bands...
It looks like the S4 gets 1900 band 2 (specs S4 for T-Mobile UMTS: Band I (2100);UMTS/HSPA+: AWS Band IV / 2100 / 1900 / 850;Band II (1900);Quad Band GSM;LTE)
Let us know which Cel-Fi you have...
Regards,
Laurent

laurent.gil said:
Guys,
I work for Cel-Fi - it looks like you are correct.
The RS2 Cel-Fi (the latest one) will boost 2 bands: 1.9GHz (aka PCS, Band 2) + AWS
BUT the older RS1 (we dont sell it anymore) will only boost AWS and not Band 2...
Check here for details on the Bands 2 and 4, and here for definitions of the bands...
It looks like the S4 gets 1900 band 2 (specs S4 for T-Mobile UMTS: Band I (2100);UMTS/HSPA+: AWS Band IV / 2100 / 1900 / 850;Band II (1900);Quad Band GSM;LTE)
Let us know which Cel-Fi you have...
Regards,
Laurent
Click to expand...
Click to collapse
I have the RS1 (older one) got it for 90 bucks on ebay
Works great!
And since you work for Cel-Fi, does the RS2 model boost the LTE signal for T-Mobile or not? From what i am reading, it does not.

Sorry for my ignorance but how is the Verizon Galaxy S4 able to connect to T Mobile let alone LTE? Is Verizon S4 a pentaband phone? I think my knowledge is outdated but I was under the impression that Verizon uses CDMA

utsc said:
Sorry for my ignorance but how is the Verizon Galaxy S4 able to connect to T Mobile let alone LTE? Is Verizon S4 a pentaband phone? I think my knowledge is outdated but I was under the impression that Verizon uses CDMA
Click to expand...
Click to collapse
They do, it switches to global mode (GSM) when you insert a non-verizon sim.. Most CDMA smartphones have this capability nowadays, which they did not before.. Verizon is the only carrier I know that does not lock the gsm radio on their phones, I think Sprint's phones are sim locked
Sent from my SGH-M919 using Tapatalk

I'll sell the new cell-fi
Sent from my SGH-M919 using xda app-developers app

[Q] Moving S4 from Verizon to iwireless/t-mobile

Hi,
I am thinking about moving my Galaxy S4 and moto RAZR from Verizon wireless to iwireless (a t-mobile affiliate). I understand that I need to unlock my phone but I am unable to find out if I move it to iwireless if I will still have 4G data. The iwireless sales rep said that I will still have voice and 2.5G service but couldn't tell me if I would still have 4G.
I was looking at this table I found on a site explaining how to unlock the phone but I don't know enough about the subject to make an informed decision.
Samsung Galaxy S4
Can someone confirm whether or not my Verizon S4 or RAZR can be unlocked to work with the iwireless/t-mobile 4G network?

sgibbers17 said:
Hi,
I am thinking about moving my Galaxy S4 and moto RAZR from Verizon wireless to iwireless (a t-mobile affiliate). I understand that I need to unlock my phone but I am unable to find out if I move it to iwireless if I will still have 4G data. The iwireless sales rep said that I will still have voice and 2.5G service but couldn't tell me if I would still have 4G.
I was looking at this table I found on a site explaining how to unlock the phone but I don't know enough about the subject to make an informed decision.
Samsung Galaxy S4
Can someone confirm whether or not my Verizon S4 or RAZR can be unlocked to work with the iwireless/t-mobile 4G network?
Click to expand...
Click to collapse
It seems as though your grasp of the subject is strong enough to know that it might work as you'd like - and it might not. You need to call back and ask to speak to a CSR that actually knows what bands their service works on so they can give you accurate information. That's kind of their job...
Also -
Verizon LTE operates on Band 13 while T-Mob operates on Band 17, both of which carry completely different spectrums; this means no LTE on either of your unlocked phones.There's a slim possibility that you will get intermittent 3G but the most likely scenario is that you will get talk, text and 2G / 2.5G only.

Band 17? My Verizon branded S4 is getting T-Mobile LTE. I'm fairly sure its on band 4.

T-mobile is band 4 which is 1700/2100 mhz. The Verizon s4 is not capable of 1700mhz. But if you are getting 4G it may be because your area is using 2100 mhz. I am specifically moving to iwireless and I was told they use the 1700 mhz band.
Bsliv, how did you unlock you phone?

sgibbers17 said:
Bsliv, how did you unlock you phone?
Click to expand...
Click to collapse
Many Verizon phones are sim unlocked, so it's most likely unlocked as well

serio22 said:
Many Verizon phones are sim unlocked, so it's most likely unlocked as well
Click to expand...
Click to collapse
Yes, I think all Verizon LTE capable phones are unlocked.
The I545 (Verizon S4) can receive LTE on band 4. T-Mobile serves LTE on band 4. The coincidence works well.

bsliv said:
Yes, I think all Verizon LTE capable phones are unlocked.
The I545 (Verizon S4) supports LTE on band 4. T-Mobile serves LTE on band 4. The coincidence works well.
Click to expand...
Click to collapse
My RAZR MAXX HD definitely wasn't SIM unlocked... For the life of me I couldn't get it to work when I moved to ATT from Verizon... Not even GSM would work.

I just need to get some clarification from you guys. Are your VZW phones bought in the US and being in the US on t-mobile's or iwireless's 4g network. Because after I made the first post I went to the phone unlocking place in my local mall and talked to there techs, they said that the VZW S4 will not get 4g. I have also been doing extensive searches online and keep finding half saying it will work and half saying it won't. I have a feeling that the ones that work are working outside of the US as I found posts saying as such.
I read some where that the razr you had to flash the radio FW to get GSM to work properly.
Sent from my iPad using Tapatalk

I got my vzw S4 off craigslist but 99% sure it was purchased in the USA. I'm on T-Mobile's $50/mo plan.
Verizon's LTE phones are sim unlocked due to an agreement with the FCC when vzw purchased some bandwidth.
I think there was an update around 03/2014 that enabled band 4 on the I545. Then had to make some apn changes and tell the modem to use gsm/lte on band 4.
The one quirk I have is it will say "no service" after a reboot and until I make or receive a voice call. Then I get the "T-Mobile" instead of "no service" and things work as they should.

bsliv said:
I got my vzw S4 off craigslist but 99% sure it was purchased in the USA. I'm on T-Mobile's $50/mo plan.
Verizon's LTE phones are sim unlocked due to an agreement with the FCC when vzw purchased some bandwidth.
I think there was an update around 03/2014 that enabled band 4 on the I545. Then had to make some apn changes and tell the modem to use gsm/lte on band 4.
The one quirk I have is it will say "no service" after a reboot and until I make or receive a voice call. Then I get the "T-Mobile" instead of "no service" and things work as they should.
Click to expand...
Click to collapse
I'll have to go to iwireless and have one of the tech put a SIM card in my s4 and razr to give it a try.
The only options I have for the network mode on my s4 is
Global, LTE/CDMA, and GSM/UMTS. Can you post you settings?
Sent from my iPad using Tapatalk

I was just at iwireless today and tested my phone with their network and was unable to get it to work. iwireless is a t-mobile affiliate but they do not use 4G LTE in my area. Their system runs on a 3.8G 1700MHz which the VZW S4 does not have. I am told that they will be starting to switch all the 2G radios in the area to 4G LTE later this year, which should work with my VZW S4. So I am just going to have to wait till the end of the year and go back and test it again.

Frankenscript said:
My RAZR MAXX HD definitely wasn't SIM unlocked... For the life of me I couldn't get it to work when I moved to ATT from Verizon... Not even GSM would work.
Click to expand...
Click to collapse
That phone was before VZW bought the band 4 spectrum and cut the deal with the FCC. All VZW LTE phones are SIM unlocked. Any AWS capable VZW phone is SIM unlocked and can use LTE on band 4. The S4 got it with an update last year.
I am probably going to do the $30 plan soon and plan to use my VZW S4. I am not going to port my number right away in case the service in my area sucks (doubtful, live in DFW in dense surburbia).

I went out off town this weekend and went to a t-mobile store and was able to get 4g service after adding the correct APN. But it is too bad that iwireless that is in my area does not use that band yet, they are staring to upgrade to that band later this year. Until then my s4 will only get edge service.
Sent from my iPad using Tapatalk

I was able to get H+ on my s4 from Verizon to tmobile by changing the network mode to global and the App to fast.T-mobile.com
Sent from my SM-G900T using XDA Free mobile app

With the announcement of the T Mobile $100 2 line unlimited everything, I'm also interested in bringing my Verizon S4 MDK boot loader phone to T Mobile, but want to do my research first-- is it as simple as signing up for T Mobile and getting one of their SIMs and then-- would I be able to flash any of the ROMs in the S4 T Mobile Dev forum or is the T Mobile S4 a completely different device? Any caveats? Would I have to LokiDoki after the flash? Would I need to flash a T Mobile specific radio too (currently on i545vrufnk1)? Or is that all just overcomplicating things? Would i be able to just adjust the APNs on my current ROM after inserting a T Mobile SIM?
Sent from my SCH-I545 using Tapatalk

Quick reply to my post and for anyone else interested-- there's a post here that talks about using a 4.4.2 T-Mobile ROM by Fenny on the a Verizon S4: http://forum.xda-developers.com/showthread.php?p=57453019 I've tried it and LTE works great, MMS works properly, phone calls work as well. I'm on the Verizon i545vruamdk bootloader and Verizon i545vrufnk1 radio. The ROM is a T-Mobile m919uvufnb4 by Fenny.
Sent from my SGH-M919 using Tapatalk