Database Users

Can an ulocked G1 be locked by upgrade or root?

If I have an unlocked G1, can anyone tell me if I root my phone and update to some of the firmwares posted hete (RC33), is it possibel that my phone becomes locked again? I now have RC19 and the phone is fully unlocked, but I'm afraid it can become locked again if I root it or flash it with another firmware. I have enough technical background to do the rooting and flashing as I have expoerience with windows mobile, but this is something new for me. Btw - i totally love the G1 and regret not leaving windows mobile.

The Sim-Lock is in an area of the phone that can not be "flashed' by the user. You are good to go!

Thanks a lot for that !

daveid said:
The Sim-Lock is in an area of the phone that can not be "flashed' by the user. You are good to go!
Click to expand...
Click to collapse
I have been looking for this answer, as well. I have a brand new g1 that I traded my 3g iphone for. It's unlocked and on my AT&T account with no problems. But I had my iphone modded to the hilt and so of course I want to do the with the g1. That was the answer i was looking for!

Anyone else?
Yes. Please, anyone who has rooted and upgraded their UNLOCKED g1 , share experience. It may seem like a stupid question to some of the "advanced" users
bt remember - you weren't born with knowledge, so share it!
For example - an ulocked Iphone can be locked when upgrading so are you sure that the G1 won't lock as well!

What do you mean unlocked? As in sim unlocked, if so it can not be locked by upgrading software.
If you mean unlocked as in you have access to root. Then yes, but that is why you use JF's firmware.

alright ive got a rooted rc33 and im on at&t, ive upgraded from rc30..
so even when you upgrade you're good to go

I mean sim unlocked
I mean what unlocked means - SIM unlocked. My device is rc19 and came unlocked for any sim cards. I haven't done anything with it yet - root or upgrade and I wanted to ask if it's safe root and upgrade a sim unlocked device.
I was concerned it may become locked again because I don't know anything about the unlocking process on the G1 - I know there is a code that's generated according to the IMEI and tahat's about it but I wanted to know if this code can be erased by flashing newer firmware. I have read the steps described on this site for root and upgrade and I plan to do those with my device but I wanted to gather some opinions first. I hope this topic will be useful to others who have bought the G1 unlocked and are concerned.

axlastro said:
I mean what unlocked means - SIM unlocked. My device is rc19 and came unlocked for any sim cards. I haven't done anything with it yet - root or upgrade and I wanted to ask if it's safe root and upgrade a sim unlocked device.
I was concerned it may become locked again because I don't know anything about the unlocking process on the G1 - I know there is a code that's generated according to the IMEI and tahat's about it but I wanted to know if this code can be erased by flashing newer firmware. I have read the steps described on this site for root and upgrade and I plan to do those with my device but I wanted to gather some opinions first. I hope this topic will be useful to others who have bought the G1 unlocked and are concerned.
Click to expand...
Click to collapse
youre safe to upgrade and root, ive done both and mine has stayed unlocked..

Ok. That sounds encouraging. I recall that there were more than one ways to unlock the Iphone. Is it the same with the G1 - I know the main way to unlock
it is by entering a code but I also know there are HARDWARE unlocked devices (as the developer edition of the G1) - Is yours only simUnlocked or is it hardware unlocked too? I'm sorry if I'm asking too much, but I don't want to pay 30$ to get an unlock code again.

It's not like the iphone. The iphone is has to be 'unlocked' by hacking the firmware, since apple have never released any legitimate way of unlocking it, and seem to take great delight in re-locking 'unlocked' iphones every couple of months (this is one of the reasons why my iphone sits at home gathering dust).
The G1 has a standard unlock code, just like just about every phone on the market. Once that code has been entered the phone is unlocked permanently. There's no such thing as a hardware unlocked device - it's merely never been locked to a provider. In the same way if I buy a 5800 from Nokia it's unlocked but it's no different to one got on contract, it's just never been locked.
Google don't care much if you run JF firmware or something you cooked up yourself... they give away the source code so you can do just that.

Thanks.
So entering the simunlock code is irreversible process, having nothing to do with the firmware. That's what I wanted to hear. Thanks guys.

Successfully rooted, upgraded to Jf RC33 with multitouch, put apps on SD and very happy now

[Q] SIM Locked after WP7 update ?

hey,
when I purchased the Samsung Focus phone,
it had SIM Lock on it , which I unlocked by
using the UNLOCK PIN ..
want to know if it will get re-locked after WP7 Update . . .
Thanks !

If you got the unlock code once, I would think it would be able to unlocked again if the update relocked you.
I've been watching a few blogs on the update topics, I have not seen anything about sim-relocking yet.
But keep in mind, it seems that not that many people have been sim unlocked, you might be in the minority of Samsung Focus users!
If you do the update, let us know your results.

if you are talking the network unlock...no updates wont re lock it. unless you put the correct diag code then enter the unlock code it wont re lock.... now sim lock is different that is a code that locks the use of a sim card unless a 4 digit code is entered... if you disabled it, it wont come back unless you enable it again...

The unlock codes are not as hard to come by anymore. Lots of different websites and people even on ebay. I used Fastgsm but if it re-locks. oh well. Doubt it will though from what other users have said of other phones

I unlocked the phone using the code from ebay NCK ZONE ...
since NODO is out, wanna know if installing NODO will re-lock my phone...

XooRP said:
I unlocked the phone using the code from ebay NCK ZONE ...
since NODO is out, wanna know if installing NODO will re-lock my phone...
Click to expand...
Click to collapse
Hi pal, it will not.

sim unlocked.
Installed nodo yesterday.
Still sim unlocked.

By chance can you tell me if you are getting a Roaming Triangle?
Do you have a focus from Rogers (paid to have it unlocked) using it with another provider?
Thx
geological1 said:
sim unlocked.
Installed nodo yesterday.
Still sim unlocked.
Click to expand...
Click to collapse

Answered your question in the other thread.
No roaming triangle with Telus sim.

i unlock my focus troough fastgsm and after install NoDo (force update) and the phone still unlocked.

[Q] SGH-i337m - is my phone unlocked?

Sup all...
Simple enough question. I've spent many days doing searches here in XDA and google but haven't been able to find a clear answer. Or maybe I didn't look hard enough or understand the responses to others questions regarding this topic.
I recently got an S4 (i337m) from Telus. From what I understand, this is the Canadian model (jfltecan). I am not sure if it is unlocked or not however. I know that I should just use a sim from a dif carrier to test, but I don't have access to one at the moment. No one I know has a micro sim that is with a carrier I could use to test with.
I've installed TWRP and flashed Slimbean and afterward I flashed Paranoidandroid roms successfully if that is some sort of indication as to the lock/unlock state of the phone.
So is there any other way to tell? Is there a method of unlocking this phone other than using the *#0011# method or similar methods that I've tried and do not work. Is an Odin method available?
Thanks

If you got it from Telus, directly, 99.99% it's locked
The only way to confirm is by popping in a SIM from another carrier.

I think it depends on how u buy the device. I think if you get the phone on a contract, its locked, but i think if you purchase the device for full price, it should be unlocked. That's atleast how i think it works.

You are most likely sim locked. There is no Odin method to unlock. You should really just buy a code to unlock. Be very careful using the free unlock methods. After a number of attempts the phone will lock itself so you'll never be able to unlock. Others have also messed up their phones trying it.

Buy a code or even safer, FastGSM.com USB cable method to unlock

I am also on telus, if this works like the s3 unlock you need to be on the stock Rom, can be rooted but must be stock.check the s4 thread to be sure though. You can go back to the custom Rom after you unlock and the phone should still be unlocked

Your phone's boot loader is unlocked. Meaning we can install a custom recovery and install a custom ROM very easily. Your phone is Sim locked if you bought it from telus. This means you cannot insert a Sim card in your phone unless its telus. Any other carrier will not work. You can unlock your phone through Telus. They have restrictions on this however. You're better off buying an unlock code off the internet. Its fast and most likely cheaper and no it does not void warranty. Hope this helps

Thanks!
Just wanted to thank everyone for the replies/info.
My phone was sim locked. I did the easy method of purchasing an unlock code from a local shop here. All is good. I can use the phone on any supported GSM carrier and I am able to flash custom roms and what not.
Thanks again to all for the info. Much appreciated and it helped me increase my understanding on this topic.
-Talabis

bootloader unlock allowed: No with factory unlock SIM

Hello everyone.
Yesterday I bought my Z1 factory unlock SIM in a store. The box with the phone was perfectly sealed. Anyway, the first thing I wanted to do is unlok the bootloader. When I try, I realize that getting into the mobile me menu appears bootloader unlock allowed: No.
I have contacted Sony and they say I need the SIMlock (number of unlock) and of course this does not have it and the operator said that neither does.
This may be so, or have cheated me in the store and sold me a mobile unlok for them?
What I can do? No way to get the number SIMlock?
Thank you.
Greetings.
PD. Sorry my bad English.

I think you getting confused. SIMlock have nothing to do with Bootloader.
SIMlock is a SIMlock from you provider, that means if you brought you phone from Vodafone, you can use Vodafone Sim only from them on your phone. But like I can see is not your case because, like you said, your phone is SIM Unlocked, that's mean unbranded.
Bootloader is that part of you device which allow you to flash your phone or root it. In your case if there is Bootloader Unlock Allowed: NO, that mean you can't unlock you bootloader. There is no way to unlock it. And you should search on XDA first.
Link: http://forum.xda-developers.com/showthread.php?t=2576948
What you can do with Locked Bootloader;
Root your phone, Flash Custom or Stock Roms, Flash Stock Kernels.
What you can't:
Flash Custom Kernels.
For the rest of the part search on XDA.

BoRoU said:
Hello everyone.
Yesterday I bought my Z1 factory unlock SIM in a store. The box with the phone was perfectly sealed. Anyway, the first thing I wanted to do is unlok the bootloader. When I try, I realize that getting into the mobile me menu appears bootloader unlock allowed: No.
I have contacted Sony and they say I need the SIMlock (number of unlock) and of course this does not have it and the operator said that neither does.
This may be so, or have cheated me in the store and sold me a mobile unlok for them?
What I can do? No way to get the number SIMlock?
Thank you.
Greetings.
PD. Sorry my bad English.
Click to expand...
Click to collapse
This is kind of an off-topic, but how did you contact Sony? Email?
I'm also having a bootloader-lock issue similar to yours, but my phone is actually SIM-locked and I need to know how to proceed with my operator to be able to unlock it.

eclyptos said:
I think you getting confused. SIMlock have nothing to do with Bootloader.
SIMlock is a SIMlock from you provider, that means if you brought you phone from Vodafone, you can use Vodafone Sim only from them on your phone. But like I can see is not your case because, like you said, your phone is SIM Unlocked, that's mean unbranded.
Bootloader is that part of you device which allow you to flash your phone or root it. In your case if there is Bootloader Unlock Allowed: NO, that mean you can't unlock you bootloader. There is no way to unlock it. And you should search on XDA first.
Link: http://forum.xda-developers.com/showthread.php?t=2576948
What you can do with Locked Bootloader;
Root your phone, Flash Custom or Stock Roms, Flash Stock Kernels.
What you can't:
Flash Custom Kernels.
For the rest of the part search on XDA.
Click to expand...
Click to collapse
Hello, thank you very much for responding.
The concepts have very clear, I come from a Xperia Z I bought right out. I had understood that to unlock the bootloader has to be mobile factory unlock or unlock if you have the attendant need to contact Sony to enable you to unlock the bootloader.
That condition must be met in order to unlock the bootloader with the traditional system?
Like I said it quite well how this works, I've had HTC's. The problem is that without the bootloader unlock AOSP I forget which I love. :silly::silly::laugh:
Emannxx said:
This is kind of an off-topic, but how did you contact Sony? Email?
I'm also having a bootloader-lock issue similar to yours, but my phone is actually SIM-locked and I need to know how to proceed with my operator to be able to unlock it.
Click to expand...
Click to collapse
I contacted Sony Spain via chat. Then I attended a girl who told me what I have to do.

Emannxx said:
This is kind of an off-topic, but how did you contact Sony? Email?
I'm also having a bootloader-lock issue similar to yours, but my phone is actually SIM-locked and I need to know how to proceed with my operator to be able to unlock it.
Click to expand...
Click to collapse
SIM unlock?
I had SIM lock...that's not problem.
Just check could your phone be SIM unlocked and if yes - order SIM unlock number from Internet.
There's million web pages and you'll receive your code in a day or two.
Sent from my Z1

BoRoU said:
That condition must be met in order to unlock the bootloader with the traditional system?
Like I said it quite well how this works, I've had HTC's. The problem is that without the bootloader unlock AOSP I forget which I love. :silly::silly::laugh:.
Click to expand...
Click to collapse
Sorry to say but if your Bootloader Unlocking Allowed saying NO you can't unlock you bootloader, So no AOSP, CM11 or PACMAN.
Read the part 2. Link: http://unlockbootloader.sonymobile.com/instructions
I come from HTC too but is not the same with Sony, they made this more complicated.

eclyptos said:
Sorry to say but if your Bootloader Unlocking Allowed saying NO you can't unlock you bootloader, So no AOSP, CM11 or PACMAN.
Read the part 2. Link: http://unlockbootloader.sonymobile.com/instructions
I come from HTC too but is not the same with Sony, they made this more complicated.
Click to expand...
Click to collapse
The thing is: people are reporting that this "bootloader unlocking allowed: no" is done by the operator/carrier, in my case, Vodafone and they have means to change the "status" in order for it to be enabled. I've read reports of other xperia users saying that through the official support channels it's possible to send the phone to Sony with the SIM-unlock code and they'll unlock everything.
Also, in Portugal theres a new law implemented in 2010 that goes like this:
You can always unlock your device from the operator: if you're on a contract, you have to pay the remaining months entirely. If your device is at least 2 years old, you don't pay anything.
If you're not on a contract, you pay the difference of the unlocked-version price with the price you paid for locked-version device - say, I paid 250€ for my locked Xperia L, the unlocked xperia L at the time I bought mine costed like 279€, i'd have to pay 279-250 = 29€ to unlock my device.
Also with this law, there's a National Communications Authority (ANACOM) which controls everything related to communications in Portugal, I'm going to contact them and report this "double lock" that's being applied by Vodafone, because I'm pretty sure that, if I unlock my phone, they're forced by law to remove every restriction on it.
I don't lose anything on trying to fight back with everything I got so... that's what I'll do.

Emannxx said:
The thing is: people are reporting that this "bootloader unlocking allowed: no" is done by the operator/carrier, in my case, Vodafone and they have means to change the "status" in order for it to be enabled. I've read reports of other xperia users saying that through the official support channels it's possible to send the phone to Sony with the SIM-unlock code and they'll unlock everything. .
Click to expand...
Click to collapse
This is something what clarified the situation. So this Lock on bootloader is done by the operator and there is a Double Lock on the phone Z1, SIM-Lock and Bootloader Lock.
And both can be unlocked?
But what have SIM-unlock code to do with Bootloader?

eclyptos said:
This is something what clarified the situation. So this Lock on bootloader is done by the operator and there is a Double Lock on the phone Z1, SIM-Lock and Bootloader Lock.
And both can be unlocked?
But what have SIM-unlock code to do with Bootloader?
Click to expand...
Click to collapse
Absolutely nothing.
They are different things

eclyptos said:
This is something what clarified the situation. So this Lock on bootloader is done by the operator and there is a Double Lock on the phone Z1, SIM-Lock and Bootloader Lock.
And both can be unlocked?
But what have SIM-unlock code to do with Bootloader?
Click to expand...
Click to collapse
That's what I'm not sure. The SIM-lock is the basic thing the operators do in order to prevent users from switching to another one, but now they also apply the bootloader-lock in order to prevent users from installing modified-unnoficial software.
Sony might request the SIM-unlock code in order to "prove" that the phone has been released, thats my best guess. I don't really know if it is somehow related to the bootloader-unlock. But since it is a restriction applied by the operator, once I request it to be unlocked, I literally asking for the full access to the device... which can only be obtained by unlocking the SIM and unlocking the bootloader

Emannxx said:
I don't really know if it is somehow related to the bootloader-unlock.
Click to expand...
Click to collapse
It has nothing to do with the bootloader unlock!!!

I bought my first Z1 phone (i've got it replaced under warranty) branded and sim-locked, but the bootloader was ALLOWED to unlock.
So - i think sim-locking and not allowing the bootloader to be unlocked, are two DIFFERENT things.
p.s. - however, i think it's worth trying that request in Portugal law. There's nothing to lose.
Sent from my C6903 using XDA Premium 4 mobile app

gregbradley said:
It has nothing to do with the bootloader unlock!!!
Click to expand...
Click to collapse
This is what I thought.

So what conditions have to have a phone to bootloader unlock allowed: YES?
What a difference one bootloader unlock allowed: YES and another bootloader unlock allowed: NO??

BoRoU said:
So what conditions have to have a phone to bootloader unlock allowed: YES?
What a difference one bootloader unlock allowed: YES and another bootloader unlock allowed: NO??
Click to expand...
Click to collapse
Bootloader Unlocked: You can flash Custom Kernels, Bootloader Locked: You can't flash Custom Kernels, Stock Only but you can flash Custom Roms and be rooted.

Well. I gonna tell you what i did in spain. I got a Phone from movistar with the status to unlock bootloader set to "no". I ask to my provider for the sim-unlock code and I got it. I sended to sony an email "[email protected]" requesting to change this status. To certified that my phone is free i add the sim-unlock code, my imei, phone number and device model. After a week or two they answered to me with this:
In connection with an inquiry number 1-9......., we inform you that we will proceed to pick up your phone for the release of the bootloader of your phone.
For this we need you to contact us by phone to ask for the information needed to program the day of collection of the terminal.
Our phone hours are: 902 180 576 Monday to Friday, 9 to 19:30 hours uninterrupted.
Once you receive your terminal you will be able to unlock the Bootloader and make the process of "unlock" the bootloader, this operation could void the terminal as shown in the web http://unlockbootloader.sonymobile.com

My case
In my case, I'm survieving with a HTC Wildfire S because Sony has taken my Z1 to change from "NO" to "YES".
Mine was from Vodafone and after SIM-Unlocking I realized I can't unlock bootloader. I contacted Sony in Spain and they asked my about my IMEI and NCK code (SIM Unlocking code).
A week later they called me saying that they would pick my Z1 to "unlock" it and 3 days ago they pick it up.
I miss my Z1.
Regards,
Urko

eclyptos said:
Bootloader Unlocked: You can flash Custom Kernels, Bootloader Locked: You can't flash Custom Kernels, Stock Only but you can flash Custom Roms and be rooted.
Click to expand...
Click to collapse
Yes, what happens once I unlock it clear and I did with my old Xperia Z.
What is not clear is I have the phone in order to unlock the bootloader or not based.

I hope you succeed in getting an allowed bootloader-unlocking phone.
However, i'm curious if Sony will return you such a device, with the same IMEI as you originally had. Please keep us informed about that.
Sent from my C6903 using XDA Premium 4 mobile app

I hope not to have to send it to Sony. If I can not solve this surely return the phone and buy it somewhere else.
Yet if I make the process of sending you the story.

Unlockboot expensive, but do you recommend?

Hi,
I found that "unlockboot" can help me to unlock my S10+ SMG-G975U, that previusly UnlockUnit identify my device as Unavailable - CDMA and something like that topic.
Do you recommend unlockboot to unlock by 99USD?
Thank in advance!

Are you wanting to carrier unlock it or bootloader unlock it? The phone is already carrier unlocked, just insert your SIM. The bootloader cannot be unlocked on the G975U.

StoneyJSG said:
Are you wanting to carrier unlock it or bootloader unlock it? The phone is already carrier unlocked, just insert your SIM. The bootloader cannot be unlocked on the G975U.
Click to expand...
Click to collapse
Hi,
No, there is a message that said "Sorry, your device can´t be activated on another carrier's..."

What carrier are you on? If you flash the U1 unlocked firmware and insert a SIM, it should work. If you don't want to flash then it looks like you need an unlock code, which is odd because from what I have read the G975U is already carrier unlocked.

StoneyJSG said:
What carrier are you on? If you flash the U1 unlocked firmware and insert a SIM, it should work. If you don't want to flash then it looks like you need an unlock code, which is odd because from what I have read the G975U is already carrier unlocked.
Click to expand...
Click to collapse
Thanks, I will try to flash U1 fw. The cellphone is Verizon, and I am looking to move to Movistar (Telefonica) of Mexico.

StoneyJSG said:
What carrier are you on? If you flash the U1 unlocked firmware and insert a SIM, it should work. If you don't want to flash then it looks like you need an unlock code, which is odd because from what I have read the G975U is already carrier unlocked.
Click to expand...
Click to collapse
Wait wait. So you're saying my Sprint S10+ is already unlocked? Just need to flash the U1 software?

If you purchased a carrier branded model new it doesn't normally come unlocked. You need to own the phone outright before a carrier will unlock it and some carriers require that the phone be used on their network for a minimum period of time (usually 1 or 2 months) even if you did purchase it outright from them.
You cannot flash U1 firmware on an S10+ unless it's carrier unlocked.

Hello,
I flashed this one: https://forum.xda-developers.com/s10-plus/how-to/sm-g975u-firmware-downloads-tmo-spr-att-t3908657. Everything goes ok, and the message of unlocking appears, requesting me the unlock code.
Any suggestion?
Thank you!

jhs39 said:
If you purchased a carrier branded model new it doesn't normally come unlocked. You need to own the phone outright before a carrier will unlock it and some carriers require that the phone be used on their network for a minimum period of time (usually 1 or 2 months) even if you did purchase it outright from them.
You cannot flash U1 firmware on an S10+ unless it's carrier unlocked.
Click to expand...
Click to collapse
Actually you can flash U1 firmware anyway, but it will still be locked to the same carrier without the unlock code. Carrier locking is IMEI based, not software or device based.
Sent from my SM-G975U1 using XDA Labs

Have you tried calling the carrier and asking them to unlock it? Most carriers will unlock your phone once you've had it for 3 months.

Psedog said:
Have you tried calling the carrier and asking them to unlock it? Most carriers will unlock your phone once you've had it for 3 months.
Click to expand...
Click to collapse
I cannot get contact with agent support, I need to have a Verizon number get into the call

jwarrior319 said:
Actually you can flash U1 firmware anyway, but it will still be locked to the same carrier without the unlock code. Carrier locking is IMEI based, not software or device based.
Click to expand...
Click to collapse
Recently the firmware for the S10+ became all-inclusive like on the S9 models so I'm not sure if flashing U1 firmware over carrier firmware will get rid of the carrier apps anymore. They seem to get installed now automatically as part of the provisioning for the installed SIM card. If you have a network unlocked Verizon phone and insert a T-mobile SIM you end up with the T-mobile boot animation and T-mobile apps and all the Verizon stuff is gone. Maybe the U1 firmware doesn't work the same way.

I read in a different thread that you have to activate the phone with Verizon and wait 3 days. After that just put in another carrier SIM and the phone should auto unlock.

jhs39 said:
If you purchased a carrier branded model new it doesn't normally come unlocked. You need to own the phone outright before a carrier will unlock it and some carriers require that the phone be used on their network for a minimum period of time (usually 1 or 2 months) even if you did purchase it outright from them.
You cannot flash U1 firmware on an S10+ unless it's carrier unlocked.
Click to expand...
Click to collapse
this is incomplete and some is inaccurate..
his vzw device doesnt need to be paid off but does need to wait 60 days from activating on the verizon network before they unlock it..
also you can absolutely flash u1 firmware on a u device, it has literally nothing to do with the sim lock.. and no, flashing u1 on u doesnt magically unlock the sim..
pretty sure on U firmware vzw device will say message cannot be used on another carrier yet.. on u1 will i believe prompt for unlock code when a dif. carrier sim is inserted
https://www.verizon.com/about/consumer-safety/device-unlocking-policy
sprint however needs to be fully paid off and active at least 50 days and account needs to be in good standing to be eligible for sim unlock

StoneyJSG said:
I read in a different thread that you have to activate the phone with Verizon and wait 3 days. After that just put in another carrier SIM and the phone should auto unlock.
Click to expand...
Click to collapse
its a 60 day period, not 3 days lmao

hackerjj22 said:
Hi,
I found that "unlockboot" can help me to unlock my S10+ SMG-G975U, that previusly UnlockUnit identify my device as Unavailable - CDMA and something like that topic.
Do you recommend unlockboot to unlock by 99USD?
Thank in advance!
Click to expand...
Click to collapse
are you trying to unlock the Sim or the bootloader? i have the same phone and was disappointed to find out i couldn't unlock my bootloader. no root no custom rom smh. but it's because Samsung removed the developer option to "oem unlock" which must be enabled to unlock. so done online service claiming to be able to do so is crap and waste of money. also if you're trying to unlock the Sim which I think that's what the site is claiming to be able to do because Sprint is a CDMA network if you unlock the SIM the only other service you can put it onto would be boost or Virgin Mobile which just use Sprint's towers. they're the only network still using CDMA. so pointless all the way around sorry buddy.

kw69747 said:
are you trying to unlock the Sim or the bootloader? i have the same phone and was disappointed to find out i couldn't unlock my bootloader. no root no custom rom smh. but it's because Samsung removed the developer option to "oem unlock" which must be enabled to unlock. so done online service claiming to be able to do so is crap and waste of money. also if you're trying to unlock the Sim which I think that's what the site is claiming to be able to do because Sprint is a CDMA network if you unlock the SIM the only other service you can put it onto would be boost or Virgin Mobile which just use Sprint's towers. they're the only network still using CDMA. so pointless all the way around sorry buddy.
Click to expand...
Click to collapse
Thanks for your reply!
I am trying to unlock the sim, the cellphone was Verizon US, (refurbished by asurion). And wanted to use Movistar (Telefonica, from Mexico just GSM). I am searching to do a root and try to follow this guide: https://forum.xda-developers.com/showthread.php?t=1693491. So what I understand, the site "Unlockboot" could do a CDMA unlock, and after 3 days of chatting with the person that is on service there, sounds that are possible, also is possible that I can continue using my GSM provider of Mexico. But it is very expensive 99$ USD is 2000$ MXN... Also, I do not trust a web service, also if there isn't a reference on this forum.
So that's the update...

kw69747 said:
are you trying to unlock the Sim or the bootloader? i have the same phone and was disappointed to find out i couldn't unlock my bootloader. no root no custom rom smh. but it's because Samsung removed the developer option to "oem unlock" which must be enabled to unlock. so done online service claiming to be able to do so is crap and waste of money. also if you're trying to unlock the Sim which I think that's what the site is claiming to be able to do because Sprint is a CDMA network if you unlock the SIM the only other service you can put it onto would be boost or Virgin Mobile which just use Sprint's towers. they're the only network still using CDMA. so pointless all the way around sorry buddy.
Click to expand...
Click to collapse
you are wrong.. U variants will work on all us carriers once sim unlocked.. its been this way a few years now..
also, i can get oem unlock but youre still not missing anything because bl unlock doesnt work still lol

I think ibowtoandroid who maintains multiple Samsung device threads on XDA has an unlock service but I'm not sure what he charges.
---------- Post added at 01:36 AM ---------- Previous post was at 01:27 AM ----------
Where I live there are multiple independent phone shops that sell SIM cards and phones and are not affiliated with a single carrier and also phone repair shops that offer to SIM unlock a phone as a walk in service. You can probably find a shop to do it if you don't trust an online service.

jhs39 said:
I think ibowtoandroid who maintains multiple Samsung device threads on XDA has an unlock service but I'm not sure what he charges.
---------- Post added at 01:36 AM ---------- Previous post was at 01:27 AM ----------
Where I live there are multiple independent phone shops that sell SIM cards and phones and are not affiliated with a single carrier and also phone repair shops that offer to SIM unlock a phone as a walk in service. You can probably find a shop to do it if you don't trust an online service.
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Let me contact him, thanks!