[Q] Is my phone carrier locked? - Samsung Galaxy Nexus

I have a Galaxy Nexus on SKT here in Korea (not sure how many of you out there are in Korea), but I'm not entirely sure if my phone is carrier locked or not.
I put an old Verizon/Vodafone SIM and KT (another Korean carrier) SIM in the phone, and for about 5 seconds it shows the carrier name, but suddenly goes to "Emergency Calls Only".
I've been reading that for people who are SIM locked, they are asked for an unlock code but putting in either SIM cards did not ask me for that. Does anyone else have this issue when putting in other SIM cards?

No one else here in Korea or can shed some light?
They use WCDMA here, but I know it has the GSM radios in it as well. Could that be a reason I don't get prompted for an unlock code when inserting another SIM?

Related

Network lock? what gives..

i just unlocked my tmobile TP2, when i placed a Boost mobile sim card it gave me a "NETWORK LOCK" message.
Why do I get this message and what is the workaround?
plz help me.
Extreme184X said:
i just unlocked my tmobile TP2, when i placed a Boost mobile sim card it gave me a "NETWORK LOCK" message.
Why do I get this message and what is the workaround?
plz help me.
Click to expand...
Click to collapse
What do you mean by unlocked? Do you mean Hardspl or do you mean Sim unlock? If you only dead a hardspl then you can't use another sim. Go here for the sim unlocker
http://forum.xda-developers.com/showthread.php?t=555339
you could try calling t-mobile and seeing if they'll provide the unlock code for you.
Tell them you are going overseas for business and need the device unlocked. This has worked for me with at&t and t-mobile.
I agree it sounds like you didn't sim unlock the phone
come on guys, its obviously SIM unlock if trying a different sim card..
it took my activation number (got it from tmoblie) clearly said the phone was SIM UNLOCKED, then i put the boost sim card, it said "network locked"
i did not try any other card yet, maybe boost sim cards are not supported, but ima test a at&t sim card to see if it works.
I know someone here must of have "NETWORK LOCK" after they SIM unlock there phone, please help me out.
Extreme184X said:
I know someone here must of have "NETWORK LOCK" after they SIM unlock there phone, please help me out.
Click to expand...
Click to collapse
Just my 2 cents for what it is worth. You might want to call boost and see if your sim is locked to an imei #. I know ATT has been using locking sim cards on prepaid for a few months now. Worth a shot
i would say your problem is coming from boost mobile and not from the phone itself... as the person above me mentioned ATT has started locking sims to phones when you buy prepaid sims, not a longshot to assume boost and t-mo will start to do this as well (if they havent already)... or it could be that boost isnt actually a gsm carrier even though it uses sims... not sure about that.
edit: i googled boost mobile technology type and they are owned by sprint... to the best of my knowledge even if you get your GSM phone unlocked it is still not going to accept a sprint (or boost) sim card.
why not, isn't the tmobile one still wcdma and gsm?
like i said... to the best of my knowledge... i never said my knowledge was any good.
can anyone confirm this?
edit: i did some more googling and all the people who asked on yahoo answers and the like got the same answer, no, your boost sim will not work in a GSM phone... i beleive if the tilt 2 were capable of both technologies it would have to have slots for both sims as well..
and to the OP, if you can get a buddy with an ATT sim to try it in the phone this will give us a definitive answer whether or not its the phone or the sim causing problems.
Boost uses the Nextel iDEN network. Although iDEN and GSM both use sim cards they run on different networks. Your Boost sim is incompatible with a T-Mobile TP2. Sorry.
sm0k3ydaband1t said:
or it could be that boost isnt actually a gsm carrier even though it uses sims... not sure about that.
edit: i googled boost mobile technology type and they are owned by sprint... to the best of my knowledge even if you get your GSM phone unlocked it is still not going to accept a sprint (or boost) sim card.
Click to expand...
Click to collapse
+1 Boost is like Sprint not GSM

[Q] [HELP] Ulocked i747 swap SIMs no connection?

When I take the SIM from my AT&T One XL and try using it in an unlocked AT&T i747 (updated to stock, unrooted LH9) i'm thinking of buying it gets no data connection and only an occasional phone signal--and i'm in a good signal area.
Most of the time the i747 thinks there is no sim installed. For instance when I go into Settings->More Settings and try tapping on Mobile Networks the message 'Insert SIM card' is displayed.
I tried factory resetting the phone, no change.
I can swap my SIM into my wife's One XL and everything works fine... my wife's SIM works fine in my One XL. But neither my sim nor my wife's sim works in the i747.
I chatted with AT&T cust svc and they told me they have to register the IMEI of the new phone every time i want to swap SIMs which as far as I know is complete BS. Isn't the point of unlocked GSM phones easy SIM swapping?
I also tried shimming the SIM in the i747 with a sheet of paper in case it was loose. No change.
Any thoughts? Bad radio hardware? I'm there is something wrong with the i747 since two seemingly good SIMs won't work in it.
Might be a bad unlock aswell. Call att if your brave.
Sent from my SGH-I747 using XDA Premium HD app
egyptshun said:
Might be a bad unlock aswell. Call att if your brave.
Click to expand...
Click to collapse
After many unsuccessful attempts i entered the secret code to check lock status (*#7465625#) and after it ran returned with:
'Connection problem or invalid MMI code'
But is that about lock status or that the running the code was in error?
FreddieP said:
I chatted with AT&T cust svc and they told me they have to register the IMEI of the new phone every time i want to swap SIMs which as far as I know is complete BS. Isn't the point of unlocked GSM phones easy SIM swapping?
Click to expand...
Click to collapse
I am on Rogers and can and always have been able to use my sim in any of my Rogers or unlocked devices. My wife on the other hand, is with Telus, and she cannot use her sim on any other device without registering the device first. There might be a self help online method if I recall. So it possible you have the same sort of deal is Telus?
Solved--exchanged phones at at&t service center, now have 4g on my s3 with same sim as i use with One X.

[Q] Unlocking a used phone.

I have been using search/Google to look for these answers, but I am seeing conflicting information. Can anyone help?
I purchased a T-Mobile Note 3 that had previously been activated on the T-Mobile network. The phone is clean and can be activated. I am going to be placing it on the AT&T network (Cricket actually). I have the SIM Unlock code. I do not intend to use the phone internationally.
I do not have :
My Cricket SIM. I am in the process of changing from Page Plus to Cricket, so my number has not been transferred yet.
An active T-Mobile SIM.
I DO have some random, currently inactive SIM card from Sprint (I know this phone wont work on Sprint, I dont want it on Sprint, its just what I have at hand).
When I place the random Sprint SIM in the phone I am prompted for the unlock code. I have not attempted to enter the code, just wanted to see if it would generate the promp.
Since this phone was previously activated on T-Mobile, do I need to put a currently good T-Mobile SIM card in it to get the unlock code to work properly?
If so, can I buy a BYOD T-Mobile SIM card from Target, leave it inactivated, and use that to unlock?
Can I use an unactivated Cricket SIM to generate the Unlock message and unlock it from there?
What will the behavior be if I unlock it using the Sprint SIM?
I have been using the search to get an answer to this question, but there seem to be some conflicting reports here.
If the sim card is other than t-mobile, you will get unlock prompt. You can enter the unlock code but if you use cdma sim cards mostly you will not get signal. I am not sure if the t-mobile note 3 is cdma compatible. But sprint note 3 has both cdma and gsm.
No, you don't need a T-Mobile Sim, active or otherwise.
Since the phone is a native T-Mobile phone and you wish to UNLOCK it, simply place a Sim card from any carrier (active or not) into the phone and boot it up. As you have discovered it will prompt for an unlock code. Enter the code you paid for and you're done, that's it.
Once you receive the cricket Sim you can simply insert it and continue to use the phone.
For the above please make sure the phone is completely stock, otherwise issues will arise

"Invalid Sim Card" only when overseas

Hello,
I had my M8 replaced under warrenty and received a brand new M8. I am in Australia and use the Telstra network, and they provide network unlocked phones for plan customers, thus this phone isn't network locked.
When I first got it, it kept saying "Invalid Sim Card" on the lock screen for 2 days, and it went away by itself. The tech at the store said at that time they had significant network problems and we're resolved at the same time my phone was playing up. In those 2 days I also replaced the Sim Card and it made no difference.
Flash forward 4 weeks and I went overseas to Germany and the phone worked fine for a few days then again said Invalid Sim Card. No matter how many times I rebooted it I couldn't get it onto the network. Once I returned to Australia it worked fine.
I am now in South Africa and my Australian Telstra Sim Card was working fine but I needed a local number for data, so I purchased a Vodacom sim with data only and it worked straight away. My girlfriend also brought a Vodacom sim for her M10 (same Telstra plan as me) and hers is fine
My sim and phone ran on their networks fine for 12 hours and I wake up this morning and it's now saying "Invalid Sim Card" again. I've tried rebooting it several times with no luck.
Does anyone have any ideas?
I'm not convinced it's the Sim Card tray as it works fine on Australia, only when overseas. I don't know anything about the radio or baseband stuff but it's that related?? What can I check??
I used the IMEI24 website to confirm the phone was unlocked from the carrier, and entering *#*#4636#*#* doesn't show any info as it's not on the network.
Phone is currently unlocked, S-on, TWRP 3.0.2.0, rooted, Marshmallow.
I'm pretty angry as I have an ultra marathon in 2 days, and this phone was to connect my Garmin watch to the internet so my friends and family could track me, and most importantly my girlfriend could find me at the finish.
Any help would be greatly appreciated.
Thanks!
matticas said:
I don't know anything about the radio or baseband stuff but it's that related??
Click to expand...
Click to collapse
I doubt it has anything to do with radio baseband. GSM bands are pretty standard worldwide, and just about any "quad band" (850, 900, 1800, 1900) GSM phone should get you at least voice and EDGE data services. And all M8 versions support those GSM bands. Therefore, any M8 should get you at least GSM service, regardless of the radio baseband installed.
I wonder if the issue is the SIM modules themselves, and the "overseas" issue is a red herring? My thought is, that maybe the overseas SIMs you purchased don't quite fit as well as your local (Australian) SIM. One thing you can try, is put some Scotch tape on the SIM (on the side without the gold contacts) and see if that "fattens" up the SIM enough to make better contact. Be careful not to get tape stuck in SIM slot/tray. I've seen this trick work for some folks with the Invalid SIM error.

dual sim

hey guys I am looking to purchase a note ten plus and was wondering if the dual sim feature would work with two different carriers, both carriers are on gsm networks.
Yes it will.
Just make sure it's unlocked and not from a ISP/services provider.
If it comes from a Telco (vodafone/O2 and other) they are software restricted to 1 SIM. You can reflash with an unlocked software (general 975F firmware and it would unlock SIM management but the telco would or should have the 2nd SIM locked.
AFAIK there isn't a sensible way to unlock a 2nd SIM for an officially single SIM device, though it Should be possible.

Categories

Resources