Database Info

Possibly simlocked?

Is it possible I bought a simlocked I9020A? Works fine on at&t but my tmo simcard wont work at all (no edge). I got it off craigslist but did a factory reset, so figured anythng the previously owner did should be undone.

Aren't all GSM Nexus devices unlocked by default, only difference being GSM/3G frequencies?

So why did you buy an att nexus s when you have T-Mobile?
Sent from my Nexus S 4G using xda premium

If you're able to make calls with the tmo sim then it is already sim unlocked. Though I am not sure why you're not getting edge.
Btw, is it rooted?
Sent from my Nexus S

Wrong apn settings?
Sent from my Nexus S 4G using xda premium

yeat I thought I'd at least get edge with a Tmo sim in. I use ATT in the US, the Tmo sim is my womans and was just to test it since since we are traveling to Europe in two weeks.

It won't hurt to check your IMEI and /efs
Sorry, didn't see that it works on AT&T :/

You should get Edge at least. Guess there's something wrong somewhere else. Talk to your carrier. If you can use some features it's not simlocked at least.
Sent from my Nexus S using XDA App

Rem3Dy said:
Wrong apn settings?
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
I would try adding a tmo apn. Not sure if it'll work but worth a shot.
Sent from my Nexus S

I have the same problem, but the other way around. I have an I9020T which does not seem to work at all with AT&T. I've made many phone calls to Tmobile, to AT&T, and to Samsung's tech support. I haven't found a resolution, yet. The last thing that was told to me by the AT&T tech support person this evening, was that perhaps I need a newer simcard - one that is fully compatible with this newer model of phone.
I'm also prepared for the possibility that the phone has a hardware defect, however I don't want to send it in for an RMA until I'm absolutely certain.
Samsung (after checking my IMEI) has told me that the phone is definitely sim-unlocked and usable on any carrier.
A couple helpful hints when talking to any tech support person:
Make sure that they cross check your IMEI number. They have a database, and if they can establish some facts about your phone that way, it can really expedite the process.
Also, be aware that tech support people step through flow charts with you, and they usually aren't actually very technically savvy. If you can get them started on a constructive tack - they'll find the right flow chart, and you might get a lot more help than if you simply call up and say "it doesn't work."

Inspire on Simple Mobile

Hey guys wondering if someone else is in the Pacific Northwest area that is on Simple Mobile with the Inspire. What I would like to know is there any better radios for the inspire that youve noticed any change in signal reception or anything than the stock radio.

Army_Spec_Ops said:
Hey guys wondering if someone else is in the Pacific Northwest area that is on Simple Mobile with the Inspire. What I would like to know is there any better radios for the inspire that youve noticed any change in signal reception or anything than the stock radio.
Click to expand...
Click to collapse
search around a bit. radio is subjective, two people with the same phone and same service in the same room will get different results with radios. best thing is try a few out and see if any are better for you.

Simple mobile uses tmobile bands therefore you only will get edge speeds, try the Att go phone sim from Walmart you'll get great speeds and maybe straight talk
Sent from my Inspire 4G using xda premium

The one issue with GoPhone is that if the SIM has been activated in a different phone, and less than 6 months have passed since it was activated, you will likely get an IMEI locked message. This doesn't mean there is any issue with the Inspire, simply that the GoPhone SIM is locked to the IMEI of the phone it was activated in.

I use red pocket mobile. In northern cali. Runs on ATT hspa plus. Not bad no issues. T mobile doesn't offer a 3g plan. Red pocket is 50-60. Might want to look into it.
Sent from my Desire HD using XDA

vwood2121 said:
Simple mobile uses tmobile bands therefore you only will get edge speeds, try the Att go phone sim from Walmart you'll get great speeds and maybe straight talk
Sent from my Inspire 4G using xda premium
Click to expand...
Click to collapse
From what I've heard straight talk is 45 a month and it unlimited
Sent from my Desire HD using xda app-developers app

bhigham said:
The one issue with GoPhone is that if the SIM has been activated in a different phone, and less than 6 months have passed since it was activated, you will likely get an IMEI locked message. This doesn't mean there is any issue with the Inspire, simply that the GoPhone SIM is locked to the IMEI of the phone it was activated in.
Click to expand...
Click to collapse
The six month policy is for unlocking the phone to other carriers. you have it backwards, my friend. If you call them and tell them that you are changing phones because the one it was activated on was damaged or non functional anymore, they will send a code to the phone to unlock the SIM. I think they can only do that for a SIM that is locked to an Android. If it was activated on a non-smart phone, you can go to any AT&T store and tell them you want to change phones and they will do it.

graydiggy said:
The six month policy is for unlocking the phone to other carriers. you have it backwards, my friend. If you call them and tell them that you are changing phones because the one it was activated on was damaged or non functional anymore, they will send a code to the phone to unlock the SIM. I think they can only do that for a SIM that is locked to an Android. If it was activated on a non-smart phone, you can go to any AT&T store and tell them you want to change phones and they will do it.
Click to expand...
Click to collapse
Not sure what you found to be incorrect in my statement. I never claimed the gophone sim couldn't be unlocked to be used in the inspire, just that it is locked by default to the phone that it is activated in. Also, though what you say is true about being able to get it changed, by default AT&T personnel don't seem to be able to diagnose the problem, when you give them the error message. A friend of mine had this issue when he tried to use a gophone sim in a nokia smartphone, and after going to the AT&T store, calling them up, etc, he asked me and I told him his SIM was probably locked to the phone it was activated in. Once he knew this, he called, and they unlocked it. However, neither the store nor customer service was able to help him, until he told them what the problem was. I also picked up the inspire I am using now for cheap, because the seller tried putting a gophone sim in it, and it came up with an "IMEI Locked" message. He assumed there was a problem with the phone, and AT&T customer service was unable to help him. Knowing the issue with GoPhone sims, I bought the phone, and have had no issues with it. So, though what you say is true, you have to know about the gophone simlock issue, in order to get it resolved.

Please post all questions in the Q & A section. Thanks! Thread moved.
Sent from my Galaxy Nexus using Tapatalk 2

[Q] Bought Used 1S, only working on AT&T

Alright so, as the title says, bought it from Craigslist and it currently won't work on T-mo. The guy was on the phone with it before I bought it (saw him) so it obviously does work. Do I have to flash a t-mo radio or can I just factory reset and it'll be fine? I don't really mind not having root at the moment. It's on LeeDrOiD if that helps. Will post any other necessary info.

So you installed a T-Mobile SIM and it said it wasn't an authorized SIM? Or are you trying to connect to T-Mobile with an AT&T SIM? Otherwise it should work fine.
Sent from my H1S using XDA Premium.

MadJoe said:
So you installed a T-Mobile SIM and it said it wasn't an authorized SIM? Or are you trying to connect to T-Mobile with an AT&T SIM? Otherwise it should work fine.
Sent from my H1S using XDA Premium.
Click to expand...
Click to collapse
My previous T-mo SIM. So I guess it's unauthorized for the device but I've had the Sim (of course) for years.

Weird. Is it an international One S, or does it say T-Mobile on the front? I've never heard of being able to lock a device to a new carrier...
You could always try the SIM unlock tutorial that's in the development section.
http://forum.xda-developers.com/showthread.php?p=27010217
Sent from my H1S using XDA Premium.

rockerode said:
My previous T-mo SIM. So I guess it's unauthorized for the device but I've had the Sim (of course) for years.
Click to expand...
Click to collapse
Is the current sim active? It should work but not WiFi calling. Try to go T-Mobile store and grab another sim.
Sent from my HTC VLE_U using Tapatalk 2

the first thing I would do is head down to a T-Mo store to get a new sim card.

Yes, the SIM is activated. Been using it for about 5 years now, was in my N1, Sensation, and a flip phone for a while. Though I did get it cut for micro-SIM from a cutter (not done by myself). Perhaps it got screwed up? Though in the settings it can still pick up my #. And yup, it has T-Mobile at the top. Alright, I'll swap out the SIM and bump this up if that doesn't work.
More info: It keeps popping up to register with a network, and I select t-mo but it says "unable to register with select carrier".

Good chance it is blacklisted. People sell phones locally and then dont pay their bills on contract or report it lost or stolen and TMobile blacklist the IMEI. I learned my lesson. It happened to me twice over Craigslist. It will only work on ATT if it is. You can call TMobile or go into the store and they can tell you if it is.
Sent from my HTC VLE_U using xda app-developers app

I would almost bet that a new sim will solve your problem here. I remember when I got a new phone with T-Mo and still had a 6-7 year old sim card. I put it in the new phone and it would not work due to incompatibility with the new network specs etc. A new sim solved the problem. Let us know how the new sim works.

OhhCoreey said:
Good chance it is blacklisted. People sell phones locally and then dont pay their bills on contract or report it lost or stolen and TMobile blacklist the IMEI. I learned my lesson. It happened to me twice over Craigslist. It will only work on ATT if it is. You can call TMobile or go into the store and they can tell you if it is.
Sent from my HTC VLE_U using xda app-developers app
Click to expand...
Click to collapse
The specific error I get is "your SIM does not allow a connection to this network." So I don't think it's blacklisted. I'll report back tomorrow whether or not a new sim work/it actually was blacklisted, though.

rockerode said:
The specific error I get is "your SIM does not allow a connection to this network." So I don't think it's blacklisted. I'll report back tomorrow whether or not a new sim work/it actually was blacklisted, though.
Click to expand...
Click to collapse
Now is it an HTC One S or the One X for AT&T. You never answer the question above, does it say Tmobile on the front of the handset?

baseballfanz said:
Now is it an HTC One S or the One X for AT&T. You never answer the question above, does it say Tmobile on the front of the handset?
Click to expand...
Click to collapse
I did answer! But yeah, it has T-Mobile up top and it's the One S.

rockerode said:
The specific error I get is "your SIM does not allow a connection to this network." So I don't think it's blacklisted. I'll report back tomorrow whether or not a new sim work/it actually was blacklisted, though.
Click to expand...
Click to collapse
that happend to me in my tmobile sensation. i bought a T-mob htc sensation 4g and unlocked it to use it in telcel mexico, after some months i decided to change company and put it a movistar simcard, but it didnt read it; the phone was re-locked to telcel in a strange way (i dont know how)
the only thing i did, was to re-use the unlock method for the htc sensation and everything was fine again...
so, try to use the unlock method for the htc one S and check if that helps you

brett_day said:
I would almost bet that a new sim will solve your problem here. I remember when I got a new phone with T-Mo and still had a 6-7 year old sim card. I put it in the new phone and it would not work due to incompatibility with the new network specs etc. A new sim solved the problem. Let us know how the new sim works.
Click to expand...
Click to collapse
I agree.
Networks have changed a lot in the last few years. A 5-yo sim card is likely to be the cause of the problem.
If the network is just sim-locked you would get an 'Insert unlock code' message [or similar].

rockerode said:
I did answer! But yeah, it has T-Mobile up top and it's the One S.
Click to expand...
Click to collapse
Sorry i missed that. I would get a new sim like everyone has suggested.

Update:
Alas, getting a MircoSim did not work. Perhaps it is blacklisted (I tried asking the guy there and he said he couldn't check, ugh). So, For now, I'm going to try to get a refund (guy said he was willing to) or try to trade it on Craigslist for something that will work. Unless someone can send over a quick guide on how to unlock the SIM reader. I tried the one that is posted and I never got the options that should have popped up.

rockerode said:
Update:
Alas, getting a MircoSim did not work. Perhaps it is blacklisted (I tried asking the guy there and he said he couldn't check, ugh). So, For now, I'm going to try to get a refund (guy said he was willing to) or try to trade it on Craigslist for something that will work. Unless someone can send over a quick guide on how to unlock the SIM reader. I tried the one that is posted and I never got the options that should have popped up.
Click to expand...
Click to collapse
That suck ballz. Hack sim should work but if its on blacklist there no way it can work on T-Mobile if your unlock it.
Sent from my HTC VLE_U using Tapatalk 2

Try this, on dialer hit
*#*#4636#*#*
Choose "Phone information"
Scroll down to Radio, see if it's On or Off.
Maybe pretty with it, turn it off turn it on see if it give you anything

When my One S was blacklisted, it gave me the same error.
You can call or chat online with T-Mobile support, and they'll tell you if it's blacklisted.
Sent from my HTC One S

Will check tomorrow whether it's truly been blacklisted or not. And I had actually tried the radio thing earlier I was very hopeful that would work.

[Q] Verizon sim and att One X?

Can I switch my verizon s3 sim card to a att one x?
I have looked up apn's and such but every time I put in an apn, then click save...it isn't there. There are no apns on the phone at all.
I have been on Verizon for over a year. I like their coverage but they are expensive each mo. I picked up this phone from a person who needed money, said the phone had been cut off because they couldn't pay their bill. They had unlocked it and rooted it before it was cut off. I can get on internet and use it as long as I am around wifi (except for phone calls of course) but I would like to get it to work and switch to Straight Talk.
When I go to settings and networks it says "Disconected because service is unavailable" I click it anyway and go apn's. there are none there. I make a new one and save it and it disappears. This is done when I have my verizon sim card in it. When I take the sim out I can't get to the APN's they are grayed out.
Any suggestions? Thanks so much...

Judeeg said:
Can I switch my verizon s3 sim card to a att one x?
I have looked up apn's and such but every time I put in an apn, then click save...it isn't there. There are no apns on the phone at all.
I have been on Verizon for over a year. I like their coverage but they are expensive each mo. I picked up this phone from a person who needed money, said the phone had been cut off because they couldn't pay their bill. They had unlocked it and rooted it before it was cut off. I can get on internet and use it as long as I am around wifi (except for phone calls of course) but I would like to get it to work and switch to Straight Talk.
When I go to settings and networks it says "Disconected because service is unavailable" I click it anyway and go apn's. there are none there. I make a new one and save it and it disappears. This is done when I have my verizon sim card in it. When I take the sim out I can't get to the APN's they are grayed out.
Any suggestions? Thanks so much...
Click to expand...
Click to collapse
Verizon is cdma while we're gsm so I doubt it'll work
Sent from my Elemental Venomized S-off HTC One XL

Try switching ROMS to maybe Viper or Hatka
Sent from my One X using xda premium

majortaylor said:
Verizon is cdma while we're gsm
Click to expand...
Click to collapse
This.
It will not work. Verizon uses a completely different network that your One X is not capable of connecting to.

Verizon uses CDMA for voice and 3G, which doesn't use a SIM. I've never used Verizon, so I'm no expert. But just doing a quick search it looks like the SIM is only for LTE. Plus, Verizon doesn't use the same band for LTE that AT&T does, so even LTE is not going to work on this phone.
http://support.verizonwireless.com/information/4gsim.html
As a rule, GSM phones will not work on Verizon. There may be some exceptions (such as phones that have both GSM and CDMA support). But the moral of the story is that you need to do thorough research before buying any phone that is not direct from your carrier, as failure to do so may mean spending your money on a phone that does not work at all on your network.
The phone will work on Straight Talk, as ST uses AT&T and T-Mobile, which are both GSM carriers.
---------- Post added at 10:35 AM ---------- Previous post was at 10:34 AM ----------
iElvis said:
It will not work. Verizon uses a completely different network that your One X is not capable of connecting to.
Click to expand...
Click to collapse
Yeah, I was surprised to even see the mention of a Verizon SIM, as I didn't think there was such a thing. But apparently now there is, with LTE.

Yes I can confirm. A friend of mine has the RAZR m, and it has a sim in it. Now it all makes sense. Still, two different networks and not compatiable. Now people think they can go sim swapping...thanks Verizon
Sent from my Carbon-ize Evita using xda-developers app

http://forum.xda-developers.com/showthread.php?t=1809314
Not entirely Tru.
Sent from my EVO using xda app-developers app

Thank-you all for your time.
Since I can't use my Verizon Sim in it. I can try the Straight Talk sim I guess. Only thing bothering me is there are no APN's on the phone and I haven't been able to make one stick... If I get a sim for Straight talk, I am wondering if I can get the APN's to stay.
Have any of you run into that? Thanks once again...

Straight talk SCH-S986C

So I snagged a straight talk galaxy S3. I've already got it rooted running official cm12 for the Verizon varient. Is it at all possible to get this thing to pick a verizon/page plus sim? From looking around I've come to the conclusion that the Verizon S3 is the most similar. What would be the options?
Any help is greatly appreciated.

Anyone?

brd912 said:
So I snagged a straight talk galaxy S3. I've already got it rooted running official cm12 for the Verizon varient. Is it at all possible to get this thing to pick a verizon/page plus sim? From looking around I've come to the conclusion that the Verizon S3 is the most similar. What would be the options?
Any help is greatly appreciated.
Click to expand...
Click to collapse
Is there a slot for a sim card? If so then you'd have to get a CDMA sim card from straight talk
Sent from my Nexus 5

ShapesBlue said:
Is there a slot for a sim card? If so then you'd have to get a CDMA sim card from straight talk
Sent from my Nexus 5
Click to expand...
Click to collapse
There is a sim slot. I actually have Verizon contract. After flashing everything an changing a few settings I have talk, text and data but its steady roaming..I wonder if I'll get charged for roaming? Anyways I'm sure if everything is working there's gotta be a way to stop it from roaming.

brd912 said:
There is a sim slot. I actually have Verizon contract. After flashing everything an changing a few settings I have talk, text and data but its steady roaming..I wonder if I'll get charged for roaming? Anyways I'm sure if everything is working there's gotta be a way to stop it from roaming.
Click to expand...
Click to collapse
So let me understand this, you have a straight talk S3 on Verizon? What sim card do you have?
Sent from my Nexus 5

Yup. Just using a Verizon 4G LTE sim.

brd912 said:
Yup. Just using a Verizon 4G LTE sim.
Click to expand...
Click to collapse
The only thing I can think is the straight talk S3 isn't playing well with verizon. I had a verizon S3 that worked great on straight talk, I truly don't know what the fix could be
Sent from my Nexus 5

ShapesBlue said:
The only thing I can think is the straight talk S3 isn't playing well with verizon. I had a verizon S3 that worked great on straight talk, I truly don't know what the fix could be
Sent from my Nexus 5
Click to expand...
Click to collapse
Maybe a modem? Been scared to try it because I'm confused as to what will cause my boot loader to lock.

Don't know why it worked but *228 just fixed my roaming problem. I thought you couldn't *228 a LTE phone? I know the straight talk S3 has 4G disabled but I'm still running a 4G LTE sim card. This is really strange lol. Never in a million years would I have thought I could get a prepaid phone running on Verizon contract. Maybe pageplus will work as good so I can get away from these high bills and get unlimited internet.

brd912 said:
Don't know why it worked but *228 just fixed my roaming problem. I thought you couldn't *228 a LTE phone? I know the straight talk S3 has 4G disabled but I'm still running a 4G LTE sim card. This is really strange lol. Never in a million years would I have thought I could get a prepaid phone running on Verizon contract. Maybe pageplus will work as good so I can get away from these high bills and get unlimited internet.
Click to expand...
Click to collapse
Wow that's great, I haven't used *228 in years. That's a possibility but I couldn't tell you for sure. I know there's a page plus thread around here
Sent from my Nexus 5
---------- Post added at 06:40 PM ---------- Previous post was at 06:39 PM ----------
brd912 said:
Maybe a modem? Been scared to try it because I'm confused as to what will cause my boot loader to lock.
Click to expand...
Click to collapse
That might be it but seeming as how it's a straight talk phone you'd only be able to use a straight talk modem update, as least I would think that would work anyways
Sent from my Nexus 5

Been running good for a few days but I can't pull in 4G..I wonder if it takes more than just a ROM flash and APN changes. From what I've read, straight talk disables 4G on this phone. Anyone know what it would talk to enable it?

brd912 said:
Been running good for a few days but I can't pull in 4G..I wonder if it takes more than just a ROM flash and APN changes. From what I've read, straight talk disables 4G on this phone. Anyone know what it would talk to enable it?
Click to expand...
Click to collapse
Seeing how it's a straight talk phone it should have LTE/4G enabled. Try calling straight talk maybe... Other than that I'm out of ideas
Sent from my Nexus 5

Wondering what it takes to make this phone a full Verizon phone. It runs off the Verizon towers, its running a Verizon ROM and recognizing it as a i535. What else would need to be changed? And exactly where do they disable 4G? In the modem or physical hardware of the phone? Maybe someone will help! I do not want to use this s4 anymore. Locked bootloaders kill me lol.

brd912 said:
Wondering what it takes to make this phone a full Verizon phone. It runs off the Verizon towers, its running a Verizon ROM and recognizing it as a i535. What else would need to be changed? And exactly where do they disable 4G? In the modem or physical hardware of the phone? Maybe someone will help! I do not want to use this s4 anymore. Locked bootloaders kill me lol.
Click to expand...
Click to collapse
Buy a GSM unlocked phone in that case. I do love my old S3 but it was time to move on
Sent from my Nexus 5

Well I'm making the switch to straight talk today. Hopefully cdma workshop can get 4G working. I've searched and searched and I can't find any explanation as to why or where the 4G is deactivated. by the process of elimination, I've come come to the conclusion that it has to be in the physical hardware. I'm going to try one more thing before I start tinkering with cdma workshop. I'm going to try to flash a d2lte rom to see if that does it. anyone know of a lollipop d2lte rom?

brd912 said:
Well I'm making the switch to straight talk today. Hopefully cdma workshop can get 4G working. I've searched and searched and I can't find any explanation as to why or where the 4G is deactivated. by the process of elimination, I've come come to the conclusion that it has to be in the physical hardware. I'm going to try one more thing before I start tinkering with cdma workshop. I'm going to try to flash a d2lte rom to see if that does it. anyone know of a lollipop d2lte rom?
Click to expand...
Click to collapse
I didn't find any with a search but If I come across one I'll post it here, the two d2vzw lollipop roms I seen are both lollipop but not & d2lte roms.
I think the issue with the straight talk S3 is indeed the hardware, they managed to remove the 4G option on this variant and the VZW prepaid version also
Sent from my Nexus 5

ShapesBlue said:
I didn't find any with a search but If I come across one I'll post it here, the two d2vzw lollipop roms I seen are both lollipop but not & d2lte roms.
I think the issue with the straight talk S3 is indeed the hardware, they managed to remove the 4G option on this variant and the VZW prepaid version also
Sent from my Nexus 5
Click to expand...
Click to collapse
I'm wondering if the process they used is the same process page plus retailers used on 4G devices..because my girlfriend had a Verizon s3 that they had to flash to 3G so it can be used on pageplus..when she switched to a note 2 a few weeks ago they told her they offered Verizon's 4G coverage now and she would get it on her note no flashing required. Worked right outta the box. We took her old s3 and hooked it up for my mom. They said that it had to be flashed back to 4G so I'm wondering if straight talk flashed this phone to 3G only with flashing software..if so, is there a free program anywhere to do this? The CDMA workshop trial has never given me the outcome I was looking for.

brd912 said:
I'm wondering if the process they used is the same process page plus retailers used on 4G devices..because my girlfriend had a Verizon s3 that they had to flash to 3G so it can be used on pageplus..when she switched to a note 2 a few weeks ago they told her they offered Verizon's 4G coverage now and she would get it on her note no flashing required. Worked right outta the box. We took her old s3 and hooked it up for my mom. They said that it had to be flashed back to 4G so I'm wondering if straight talk flashed this phone to 3G only with flashing software..if so, is there a free program anywhere to do this? The CDMA workshop trial has never given me the outcome I was looking for.
Click to expand...
Click to collapse
I would like to know how you got a straight talk phone on Verizon prepaid? That's the first ive heard of this model going yo Verizon, its not supposed to be possible. Explain.

N_psycho_PD_uh? said:
I would like to know how you got a straight talk phone on Verizon prepaid? That's the first ive heard of this model going yo Verizon, its not supposed to be possible. Explain.
Click to expand...
Click to collapse
About 2 weeks ago I was using this straight talk s3 on Verizon postpaid, not prepaid. I just flashed a Verizon ROM and setup the apns and threw my Verizon sim card in and it worked. It stayed in a roaming state but it worked fine. Calls, texts and data. I think I did dial *228 to get it to lock onto the network. I still have the line if you would like to see some proof

brd912 said:
About 2 weeks ago I was using this straight talk s3 on Verizon postpaid, not prepaid. I just flashed a Verizon ROM and setup the apns and threw my Verizon sim card in and it worked. It stayed in a roaming state but it worked fine. Calls, texts and data. I think I did dial *228 to get it to lock onto the network. I still have the line if you would like to see some proof
Click to expand...
Click to collapse
If you are saying that you were on Verizon because you had the Verizon wireless showing in your status bar or because it said it in your phone somewhere then no you weren't on Verizon, your phone showed that stuff because it has that stuff in your build.prop, that doesn't mean you were on Verizon, the only way to actually be on Verizon is if you actually setup an account with them and activated the phone on their network. Supposedly Verizon won't let you activate a straight talk phone on Verizon account, this device is not able to carrier unlock and that's what you have to do to actually switch carriers and use your IMEI on another network. It shows SCH-I535 because of the build.prop, all of that Verizon stuff and the i535 stuff can be edited in the build.prop, that has nothing to do with who you actually have service with, that's just there because its written in the ROM.