SIM Unlock Help - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

just a simple question. how can i tell if my GS4 is SIM Unlocked? i dont have another SIM card from another carrier, and just wondering if there is a way to check it it is unlocked or not. thanks.

Take it to another gsm carrier's store. I took some phones to t-mobile and the guy gave me a blank sim that only made 911 calls. He said old people get those sims for free, so I held onto the sim to test unlocked devices.
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SIM card locked

Sorry to be posting as soon as I registered, but I'm in a hurry to get this done with or else I might get into a fight with the guy who sold me the Nexus One (he claimed its unlocked)...
Anyway I bought the phone, put in my sim-card, tried installing my contacts from the SIM and it Locks.
I use any other SIM card and it works, mine doesn't...However I unlock the phone using the steps provided in the forum...Now I can install any SIM on it without any issues EXCEPT for MY sim-card which had already been locked...
I tried getting a new SIM from my provider with the same phone number but i get the same result - locked...
What do you guys suggest I do?
I would really appreciate any help guys...
Thanks a lot in advance
I thought the Nexus One is sold unlocked. You are using a GSM sim, right?
Yeah - But i guess the guy who sold it to the store had already bought it with a contract from T-Mobile ...
Yeah im using GSM sim...
He could have bought it with a contract from (insert chosen deity here) and it wouldn't make a difference. The Nexus One is SIM free no matter where you get it.
Are the SIM you've tried that work on a different network to you? Perhaps your network has blocked it's IMEI after being lost/stolen/part of an insurance claim.
Rusty! said:
He could have bought it with a contract from (insert chosen deity here) and it wouldn't make a difference. The Nexus One is SIM free no matter where you get it.
Are the SIM you've tried that work on a different network to you? Perhaps your network has blocked it's IMEI after being lost/stolen/part of an insurance claim.
Click to expand...
Click to collapse
I tried other sims from the same network as mine and they all work except for mine! very weird...ughhh
Old crap sim probably, not all sim cards are made alike, even though they look like it. Ask your provider for a new sim.

Unlocked HD2 Not Recognizing SIM?

Hey,
So I recently bought an unlocked T-Mobile HTC HD2 from the marketplace forum. However, it does not seem to be recognizing my Telus SIM card. It simply states "No SIM, Please insert SIM" even when my SIM is inserted.
I thought it may be because the phone was not unlocked as it was described to be, but then I tried a family members Rogers SIM, and it worked perfectly.
Any idea as to what's going on?
You might need to get a new sim card. Sometimes if you have a older sim card the HD2 will not recognize it.
Hm, that would be interesting, considering my SIM is less than a year old...
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DS1495 said:
Hm, that would be interesting, considering my SIM is less than a year old...
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Hmmm that is curious then, maybe it is not the right type of sim card as there is different classes of sim card, or at least I think there is. you might want to take your HD2 to your local Telus store and tell them your problem and see if they think a new sim card will help or maybe have another suggestion for you.
So, I just tried my brothers Telus SIM, and it also did not work...
Is it possible that the phone is only unlocked for use on Rogers here in Canada?
I'll head to the Telus store tomorrow and see what they say..
DS1495 said:
So, I just tried my brothers Telus SIM, and it also did not work...
Is it possible that the phone is only unlocked for use on Rogers here in Canada?
I'll head to the Telus store tomorrow and see what they say..
Click to expand...
Click to collapse
It is unlikely that it is not unlocked to Telus as when a phone is sim unlocked it is suppose to be unlocked to all cell providers, but when you sim unlock a phone you have to have a sim card from another provider so maybe it just unlocked it to that carrier of the sim card you use to unlock the phone. I am not 100% sure about this as Io have never sim unlocked any of my phones but I have read plenty about doing it and people that have done it.
T-Macgnolia said:
It is unlikely that it is not unlocked to Telus as when a phone is sim unlocked it is suppose to be unlocked to all cell providers, but when you sim unlock a phone you have to have a sim card from another provider so maybe it just unlocked it to that carrier of the sim card you use to unlock the phone. I am not 100% sure about this as Io have never sim unlocked any of my phones but I have read plenty about doing it and people that have done it.
Click to expand...
Click to collapse
Yeah, that's sort of what I was thinking. Although it was my understanding that even though you have one SIM in it when it's unlocked, it should be SIM unlocked for other carriers as well. But maybe I'm mistaken.
Should I try unlocking it again using an online service, but this time make sure I've got my Telus SIM in it?
DS1495 said:
Yeah, that's sort of what I was thinking. Although it was my understanding that even though you have one SIM in it when it's unlocked, it should be SIM unlocked for other carriers as well. But maybe I'm mistaken.
Should I try unlocking it again using an online service, but this time make sure I've got my Telus SIM in it?
Click to expand...
Click to collapse
Well like I said I was under the impression once you sim unlock your phone it is unlocked to all carriers. But hey it couldn't hurt to buy a unlock code from one of the many services online that you can buy a code from, they are not expensive. But make sure you buy one from a reputable seller. Plus most of the online services have the code to you in very short order.

Foreign Sim Cards

Hi,
I was just wondering what type of message to expect when you put in a foreign (Canadian provider: Rogers\Chatr, and Wind\Mobilicity) SIM card into the phone be it unlocked or not. I ordered a phone and it would not even detect the SIM card, it just said no SIM Card Emergency Calls Only. So I sent it back for a refund which is still pending approval, but the seller still claims that the phone works with US carrier SIM cards (T-Mobile, AT&T).
What do you guys think?
i have a wind mobile sim based android phone with a qualcom chipset and sim booted right into it. Pre and post rooted the phone worked just fine. Stupid question but was the sim inserted properly and was it seated correctly and titly so that it was connecting. I've never had an issue with foreign phones. I'm stateside
grhand82 said:
i have a wind mobile sim based android phone with a qualcom chipset and sim booted right into it. Pre and post rooted the phone worked just fine. Stupid question but was the sim inserted properly and was it seated correctly and titly so that it was connecting. I've never had an issue with foreign phones. I'm stateside
Click to expand...
Click to collapse
Yea, I even tried putting paper in there to make a tighter connection. I can't understand how the phone wouldn't recognize any of my SIMs that work perfectly in other phones, but works just fine with the US SIMs that the seller has. I think the seller is trying to scam me out of the return shipping.
Does anyone have the solution to this problem? I don't understand how the phone could work fine with US SIM cards, but not work at all with Canadian SIM cards (i.e. not even recognize that a SIM card is in the phone).
corey.t.m said:
Does anyone have the solution to this problem? I don't understand how the phone could work fine with US SIM cards, but not work at all with Canadian SIM cards (i.e. not even recognize that a SIM card is in the phone).
Click to expand...
Click to collapse
So.... You are claiming a refund for the phone because it doesn't work with canadian sim when seller says it works for us based sim??? Did the seller say anything about it working with canadian sim????
My phone with s off works with att sim on 3g, or was it 2g.....
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I take it you are near the U.S. border, where about? If you're near me, we can meet up and see if it is consistent in all the myTouch 4Gs. Mine is rooted, unlocked, good screen and good eMMC. Should be the best scenario to double check.
Sent from my HTC Glacier using XDA App
No need to. I've seen people call in after coming from another country and have used foreign SIM cards in the phone.
I take it you are near the U.S. border, where about? If you're near me, we can meet up and see if it is consistent in all the myTouch 4Gs. Mine is rooted, unlocked, good screen and good eMMC. Should be the best scenario to double check.
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
I actually live in toronto, so would be unable to do that.
kalel33 said:
No need to. I've seen people call in after coming from another country and have used foreign SIM cards in the phone.
Click to expand...
Click to collapse
This makes sense that foreign SIM cards would work, if the phone communicates through a standard GSM frequency it should work for all of them. When I had the phone I rooted it with s-OFF and I'm assuming that would unlock it even for foreign SIM cards. Anyone experienced with phones being locked to a particular country?
I want to buy another MT4G but I also want to make sure it will work in Canada first.
rooting your phone does not unlock your sim. call tmobile and tell them you would like to unlock your phone because you travel out of the US often.
I did that and after it was unlocked I was able to use my phone in Ireland with a pay as you go O2 sim card
halfcalf said:
rooting your phone does not unlock your sim. call tmobile and tell them you would like to unlock your phone because you travel out of the US often.
I did that and after it was unlocked I was able to use my phone in Ireland with a pay as you go O2 sim card
Click to expand...
Click to collapse
Sorry, I forgot to add that the seller claimed to have unlocked the phone with a code. I'm just wondering if the phone could still have been locked to US providers, and if so, why would the phone still not recognize any Canadian SIMs?
corey.t.m said:
Sorry, I forgot to add that the seller claimed to have unlocked the phone with a code. I'm just wondering if the phone could still have been locked to US providers, and if so, why would the phone still not recognize any Canadian SIMs?
Click to expand...
Click to collapse
Im not sure. My phone has been unlocked for awhile but I believe that if your phone is not unlocked when you put a foreign sim card in and turn it on it will ask you for the unlock code.
When you turned your phone on with your Canadian sim card in it did it tell you that your phone did not have a sim card in it, or were you just unable to get service?
halfcalf said:
Im not sure. My phone has been unlocked for awhile but I believe that if your phone is not unlocked when you put a foreign sim card in and turn it on it will ask you for the unlock code.
When you turned your phone on with your Canadian sim card in it did it tell you that your phone did not have a sim card in it, or were you just unable to get service?
Click to expand...
Click to collapse
it said no SIM card.

AT&T specific question

I have been with sprint for a long time and never had to mess with sim cards. I am now with att and I have a question about sim cards and activations. I have an android phone right now with att that I am going to replace with the note 2. Can I just pull the sim card from the current phone and put it in the new one? Or do I have to take it into the att store? Also does this cause an activation fee?
Moved to Networking section.
You can just switch the SIM. If it's an already activated SIM (meaning it had service in the prior phone) there should not be an activation fee.
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Thanks for the info. That is what I was thinking but I wasn't sure.
Yes, one of the great things about gsm/sim cards. Easy swappable. If your current phone uses standard mini sim, you will need to cut it down to work in the note2/other newer phones that use micro sim cards.
Currently using the original note. So I don't know what kind of sim it has.
ElAguila said:
Currently using the original note. So I don't know what kind of sim it has.
Click to expand...
Click to collapse
You Will need to go to the store. Note 1 has A regular sized sim and the Note 2 takes a Micro Sim you will need a smaller sim but sims are free.
hyelton said:
You Will need to go to the store. Note 1 has A regular sized sim and the Note 2 takes a Micro Sim you will need a smaller sim but sims are free.
Click to expand...
Click to collapse
Your can use a SIM cutter. No need to go-to a store. Just be careful and follow the instructions. I've used it twice on various phones.
Snowflake approved this message....
ElAguila said:
I have been with sprint for a long time and never had to mess with sim cards. I am now with att and I have a question about sim cards and activations. I have an android phone right now with att that I am going to replace with the note 2. Can I just pull the sim card from the current phone and put it in the new one? Or do I have to take it into the att store? Also does this cause an activation fee?
Click to expand...
Click to collapse
Just insert that to any unlocked phone you want,
Our policy at at&t is if its a gsm it's possible,
No fees for device transfer since we have a SIM number as a basis of the account not the IMEI or ESN
this post is approved by the national potato safety regulation
I have changed phones before and just changed the sim from one phone to the next. I also went to att when another phone took am smaller sim and the att rep got a smaller sim and updated it and handed it to me and said have a nice day. I love att's customer service.

For Those Running a Google Play Edition I9505G on AT&T

Hey everyone,
Did anyone register the IMEI for their I9505G with AT&T? If so, did you have any issues with your data plan changing to non-LTE? My GPE S4 will be here tomorrow and I'm worried that when I activate it, AT&T may not see it as an LTE-compatible device and thus limit my data plan to HSPA+ or something. I know when you're dealing with unlocked devices on AT&T, they will change your date plan speeds based on what their records show the device is capable of. So... did anyone have any issue with this or am I worrying over nothing?
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No. I never had any problems. I just asked for a new sim. Nothing more. I was coming from a skyrocket, took the larger sim. No questions were asked. They just got grabbed a new Sim card. Put it in and activated it. LTE workes great for me when I am in it.
Sent from my GT-I9505G using Tapatalk 4
No major problems. It was pretty straightforward. Only problem I had was that the S4 uses a micro SIM card and my old phone used a normal sized one so it didn't fit. One trip into an AT&T store and I was all set.
If you don't want to get a new micro SIM card, I guess there are some ways to trim down a normal card so that it works. Seemed easier to just go down to the store and get a new one and handle the activation in one stop.
occupational_hazard said:
No. I never had any problems. I just asked for a new sim. Nothing more. I was coming from a skyrocket, took the larger sim. No questions were asked. They just got grabbed a new Sim card. Put it in and activated it. LTE workes great for me when I am in it.
Sent from my GT-I9505G using Tapatalk 4
Click to expand...
Click to collapse
Ah. So when you got the new SIM card, did you provide your new IMEI number? Or does AT&T still think you have a Skyrocket?
I have an AT&T GS4 right now, so I currently have an LTE data plan. I know I can just swap the SIM and LTE will work just fine. But say I called AT&T and said "Hey, I don't have that phone anymore and here is the IMEI of my new phone...", that's my question.
Does AT&T see the GPE GS4s as LTE capable in their database? I prefer to keep my IMEIs up to date with my carriers, but I won't update it if it means there's a chance I could lose an LTE data plan due to incorrect info on the I9505G in AT&T's database.
That's why I'm asking if anyone actually has an I9505G IMEI number registered with AT&T and if they had any LTE issues after doing so.
Sent from my Xoom using Tapatalk 4
irishpadres said:
No major problems. It was pretty straightforward. Only problem I had was that the S4 uses a micro SIM card and my old phone used a normal sized one so it didn't fit. One trip into an AT&T store and I was all set.
If you don't want to get a new micro SIM card, I guess there are some ways to trim down a normal card so that it works. Seemed easier to just go down to the store and get a new one and handle the activation in one stop.
Click to expand...
Click to collapse
When you got the SIM, did you give them your I9505G IMEI number or do they think you still have your old phone?
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oldblue910 said:
When you got the SIM, did you give them your I9505G IMEI number or do they think you still have your old phone?
Click to expand...
Click to collapse
I gave them the new IMEI number.
After your two year contract is up, and you unlock your phone, do they turn off LTE? No. Plenty of people bring LTE capable phones to att network. If there is a problem. Make a phone call. They want your money more than they want a lost customer.
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occupational_hazard said:
After your two year contract is up, and you unlock your phone, do they turn off LTE? No. Plenty of people bring LTE capable phones to att network. If there is a problem. Make a phone call. They want your money more than they want a lost customer.
Sent from my GT-I9505G using Tapatalk 4
Click to expand...
Click to collapse
I understand that, but when it comes to unlocked devices that AT&T doesn't sell or support, like Nexus devices and, in this case, and I9505G, they sometimes have incorrect information about the phone's capabilities in their IMEI database. That it can lead to problems. But IrishPadres said he gave them the new IMEI and he still had LTE so that answers my entire question. That means that, even though they don't sell the I9505G, they still see it as an LTE capable device. :thumbup:
Sent from my Nexus 10 using Tapatalk 4
I just popped my SIM in and was fine. Never called ATT. I was already provisioned for LTE etc. You will only need to worry if you currently do not have a ATT account provisioned for LTE and a SIM. If you need to get a new account and SIM you may need to let them know the IMEI.
perfect
I swapped my sim out of my crappy iPhone 5 with a sim card adapter and no issues ever.

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