[Q] 2 Sim Cards One Phone - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Idk if this is possible. I have an Unlocked AT&T phone and I would like to use it on T-Mobile. If I decide I don't want to keep T-Mobile and return to AT&T using the same device, can I?
Thank You

An unlocked phone will work with whatever company's sim card is currently installed, given that the sim card is activated.
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HORiZUN said:
An unlocked phone will work with whatever company's sim card is currently installed, given that the sim card is activated.
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Thanks for such a prompt reply.

Youre welcome, but you should ask questions in Q&A next time.
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HORiZUN said:
Youre welcome, but you should ask questions in Q&A next time.
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Ya know I just thought about that.....Sorry Should I move it?

A mod will have to move it.
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HORiZUN said:
A mod will have to move it.
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Ok..Thank U

And tbh I know I saw somewhere theres a region unlock method somewhere. A
Thatx an app
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Related

Question about development section

So with my older phones there were specific sections for each carrier. With the One can I just flash whatever regardless of me being on Sprint? Thanks
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There's a sprint section. Probably not because I having seen anyone say anything about it plus no one wants to brick their device
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Stopsign002 said:
So with my older phones there were specific sections for each carrier. With the One can I just flash whatever regardless of me being on Sprint? Thanks
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Sprint HTC One Forum : http://forum.xda-developers.com/forumdisplay.php?f=2215
Ah, missed that. Thank you
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Buying telus s4 tmrw, easy to unlock?

I'm picking up mine tomorrow and its locked to telus. Are these easy to unlock?
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Ebay $5
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Isn't there another way?
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yeroc1982 said:
Isn't there another way?
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Use csc code for the carrier you want it on? There is a thread about it here somewhere.
yeroc1982 said:
Isn't there another way?
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You could try using the free method posted on the forums here but it is not guaranteed to work. Your other option is to purchase an unlock code for $5-20 and be done with it.
I personally just bought a code.
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Please read forum rules before posting
Questions and Help issues go in Q&A and Help section
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator
I needed to get one unlocked, I managed to convince Telus to sell me the unlock code for $35. I was not in the mood to try the third party websites.
Your mileage may vary in convincing Telus to unlock the device.
I tried all the free methods with no luck so I took it in and got it unlocked for $30.
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Anyone use ATT Prepaid on the S4?

I was wondering if anyone is using this? Does ATT have prepaid micro sims? Will I need to sim unlock my device? Thanks!
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As long as you activate the SIM on the AT&T or international variant that you have, you didn't specify, it will work. I do not think you will have LTE though.
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graydiggy said:
As long as you activate the SIM on the AT&T or international variant that you have, you didn't specify, it will work. I do not think you will have LTE though.
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I have the att version with mf3. Dont care much about lte.
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I use to have go phone $60 plan on it. It works great. Go to the att store and they should hook it all up for you. Inculding the micro Sim card. You'll get LTE. Just have them program it correctly.
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Febby said:
I use to have go phone $60 plan on it. It works great. Go to the att store and they should hook it all up for you. Inculding the micro Sim card. You'll get LTE. Just have them program it correctly.
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How much is the sim? Does it come with the 60 dollar plan?
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xamadeix said:
How much is the sim? Does it come with the 60 dollar plan?
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It should come for free with the purchase of the 60$ plan. Check our your nearest att store. All the stores around me give it for free.
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Febby said:
It should come for free with the purchase of the 60$ plan. Check our your nearest att store. All the stores around me give it for free.
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Okay! Thanks!
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i use a tmobile pprepaid with my att i337. haha. i just upgraded my old phone, and didnt put the sim card in- unlocked it and now it is working
xamadeix said:
I have the att version with mf3. Dont care much about lte.
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Well...my s4 is on ATT prepaid 2gb data plan and LTE works just fine. Stock MF3 firmware.
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T-Mobile gets first flashable ROM.

http://forum.xda-developers.com/showthread.php?t=2720382
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(Note: Mod Edit on Title)
Really
ibcenu said:
http://forum.xda-developers.com/showthread.php?t=2720382
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This is a sprint thread.....thanks for showing off
AcE2DuCe said:
This is a sprint thread.....thanks for showing off
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I have sprint. Wasn't showing off. .just looking around ..sorry to offend you
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lol
ibcenu said:
I have sprint. Wasn't showing off. .just looking around ..sorry to offend you
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Was just joking ;-] I'm sure ours will come soon...
How did they win. We had the root and you can use wanam
From the new and improved galaxy s3 code named gs5
Benconquerer said:
How did they win. We had the root and you can use wanam
From the new and improved galaxy s3 code named gs5
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They have hotspot enabled!
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Edit..Mods please edit title or delete..I should have named it that they were 1st to have a flash able rom..sorry for any misunderstanding. Just wanted to point out what the other team had done
ibcenu said:
http://forum.xda-developers.com/showthread.php?t=2720382
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I edited the title and will be closing this thread. Let's move on to other things now...

bought a s4

Just got another S4but this one came with NAE, is there anyway to do the Domestic Unlock while like this?
Videos, Links,tip,tricks etc greatly helpful and if it work you have a PayPal Donation coming
Holy moly, you can use the very same domestic unlock process by miller. If you searched you would have gotten your answer without having to make this thread.
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daniel4653 said:
Holy moly, you can use the very same domestic unlock process by miller. If you searched you would have gotten your answer without having to make this thread.
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I think he owes you a Pay-Pal Donation...
And it wont completely work.
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Sanadrate said:
And it wont completely work.
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what didn't work? if you say LTE or MMS on another network that's because 1)LTE won't work on any other network because of different baseband. 2) you need to set the correct APNs.
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Wont read ttmo sim
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Then you must have not followed all of the proper steps. It does in fact work.
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Confirmed NAE S4 domestic working on T-mobile and AT&T.
you need to interantional unlock first
a quick google search on sprint s4 sim unlock would get you all you need.
laofan said:
Confirmed NAE S4 domestic working on T-mobile and AT&T.
you need to interantional unlock first
a quick google search on sprint s4 sim unlock would get you all you need.
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the domestic unlock thread requires the user to complete the international unlock first.
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Did that
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Sanadrate said:
Did that
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Did you revert to MDL modem?
Could you make sure the s4 is reading sim correctly( when plug T-mobile sim, it should say unsupport sim or something).
Here is a procedure I follows.

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