Lost sim card unlock!!!!! - Galaxy S 4 Active Q&A, Help & Troubleshooting

I have a rooted s4 active on the AT&T network. I bought in used with the simcard unlocked and have been using it with my family mobile. I tried to update the phone(failed) with an update i found on here... well it didnt work and now that i did that my network is no longer unlocked...
How can i get it unlocked again without having to pay for it? Any ideas?

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[Q] ATIV S Neo (SPH-i800) Sprint SIM Unlock

Hey guys,
I am in Spain. I asked Sprint to SIM unlock my phone before I left and they said it worked but it did not. I bought a movistar SIM and all I get is 'no service.' Under Cellular+SIM options, it is in CDMA only mode and the option to change it is greyed out. I was in 8.1 so I flashed to 8.0.10328.78 and called Sprint. They want me to update my network profile to send the command to unlock it but it isn't working over WiFi.
The phone knows that the SIM is there, I can access the SIM applications, read the SIM ID and when I turn on the phone with it inserted it says 'switched to CDMA only.' So I think it is still SIM locked. Is there a way I can unlock it? I've never had to deal with this before.
No ideas? I need to know whether I should give up and try to return the plan I bought.
laldobbe said:
No ideas? I need to know whether I should give up and try to return the plan I bought.
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Can Sprint version Ativ S neo unlock ?
Agreed
Just adding to the overall knowledge base here.
I am experiencing the exact same problem.
1. I purchased my phone unlocked (though it was previously on Sprint). I have previously been able to use foreign SIM cards (in France), without issue.
2. At some point, I installed the Developer's Preview of WP8.1 and lost the ability to roam domestically or internationally.
3. I am now in Israel, and tried an Israeli SIM card, but it was on a GSM network. It connected to the network, but showed up as international roaming. Ooops, guess I need to fix that little WP8.1 Beta issue...
4. I decided to flash my phone back to WP8 GDR3, which seems to have un-unlocked my phone. Now when I plug my Israeli SIM card in, my phone automatically switches to CDMA mode.
5. However, if I pop a Sprint SIM card in, I have the ability to switch to Global Mode again.
I have the MSL, but I cannot figure out where I would enter it to get this to stop happening.
FYI.
I had a problem , I live in Ukraine , my phone was unlocked , but when I installed 8.0 my phone worked only in CDMA mode with a Sim card from my service , I updated to 8.1 again using the preview for developers and settings again appeared global regime.

ATT S3 Mini SM-G730A problem unlock network

Hi guys I just got a samsung galaxy sm-g730A which is not yet released. At first when I put the sim card from another carrier he asked me a network code in the meantime I had already ordered the code and once I received the code, the phone don't ask me to enter the code unlock network. I even restored the phone but it still does not solve the problem.
Is there someone who has a solution to my problem please
Which carrier? My unrooted SM-G730A works fine on H2O Wireless, and never asked me for a code. I don't know if it is unlocked or not, since H2O WIreless is advertised as being compatible with AT&T phones.

Unlocked AT&T Galaxy S5 not working with Metro Pcs

Hey, I'm really new to unlocking phones and this is my first unlocked phone. I unlocked the phone using GSM UNLOCK labs and it unlocked fine, but I'm not able to call, text, or use data. I have already changed the apn settings to metro's but it still doesn't work. Aldo I get a phone not allowed mm#6 when I start up my phone. When I try to call someone it says not registered on network. I don't think it's an imei # problem cause I can still check it and see that's it's the same since before I unlocked it.
Thanks any help is appreciated.

PSA - Sprint Models - Factory reset can cause phone to relock / invalid sim card.

PSA for Sprint Moto z3 Play. After the last software update to Build OCW28.70-47, a factory reset caused my phone to no longer read my sim card and appears to somehow have relocked the phone to Sprint. Prior to this software update and reset, the phone read my T-Mobile sim card fine and connected to the network. Calling Sprint verified that my device was already sim unlocked. Calling T-Mobile and they can't do anything on their end. Lastly calling directly to Motorola, and they confirmed that they have already received other calls and that they are working on a software update to fix this glitch. For now, this leaves me with a phone I can't use until this software update fixes it. So just sharing here so others in this situation won't be in the same boat.
LBN1 said:
PSA for Sprint Moto z3 Play. After the last software update to Build OCW28.70-47, a factory reset caused my phone to no longer read my sim card and appears to somehow have relocked the phone to Sprint. Prior to this software update and reset, the phone read my T-Mobile sim card fine and connected to the network. Calling Sprint verified that my device was already sim unlocked. Calling T-Mobile and they can't do anything on their end. Lastly calling directly to Motorola, and they confirmed that they have already received other calls and that they are working on a software update to fix this glitch. For now, this leaves me with a phone I can't use until this software update fixes it. So just sharing here so others in this situation won't be in the same boat.
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Quick question, did you unlock it through Sprint? How's the service and reception on it?
I'm on T-mobile and thinking of buying a Sprint variant to unlock and use with T-mo.
Thank you
I got this phone from a reseller already unlocked thru Sprint. For the short time it worked on T-Mo before it got relocked, service and reception was fine. But my advice is Don't Do It! Buy yourself the fully unlocked version, don't bother with a Sprint model to unlock as it is not worth the hassle; plus the fully unlocked version has 64gb versus 32gb on the Sprint version. Unless you are on Sprint, don't get the Sprint model!!! My story is similar to hundreds of other people with other phones having much difficulty in getting a Sprint model unlocked to work on other carriers (e.g. Essential phone has lots of similar problems).
UPDATE: Was able to go to a Sprint store, get a sample Sprint sim, insert and request the UICC unlock code and it got pushed through again so now my X3 is again unlocked for any carrier and now works with my T-Mo sim. So you need a Sprint sim to get that unlock code pushed thru, won't work just on wi-fi without that Sprint sim!
have an update for us to hear? this xt1929-3 still unlocked...
we bought this model (sprint) as a cheap gamble off ebay and it was the best thing. put in my redpocket gsm-t sim this morning and it says in the system update setting under uicc unlock "the device is unlocked for any sim card". that was even after unlocking the bootloader last night. thought we were going to need to do some modding to get away from sprint but didnt have to! so thrilled we will have this nice phone for the wife to enjoy.

Bought unlocked renewed phone and used TMobile SIM to test, now it's carrier locked.

Out of the box the phone was unbranded, and the phone is for my girlfriend's mom, who lives in the Philippines. I have TMobile and wanted to test that it would work so I put in my sim to test it. After a reboot it had the the TMobile splash, sounds and apps that it didn't have before, and now it says that it's network locked.
Can this be flashed back to the way it was out of the box? I've rooted phones before, so I just need to know what to do IF it's possible, or do I just have to try to get it carrier unlocked now and it will stay TMobile branded?

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