Samsung s7 edge 935T t-mobile phone unlocked but at&t network or sim card issue? - T-Mobile Samsung Galaxy S7 Edge Questions & Answer

I have an edge that is unlocked by tmobile.. in the app, permanent unlock (tmobile unlock app), it says.. "unlock failed" but below says permanently unlocked, unlock approved.. my understanding is this is a normal message.
When i went to the ATT store to test a sim.. they use their live sim, put it in, try to make a phone call but simply said it didnt work, isnt unlocked, which i dont think is right.. issue is i didnt see what if any error message there was.
Is there some step that the att rep should have done to get this on the att network besides putting it in the phone?
Thanks in advance for any info

edit: appears a special sim is needed, at least according to an online rep.. i was told to have them look up the IMEI with the MyCSP tool in the store to determine which sim.

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Is Unlocked now?

Called sprint today and asked to sim unlock the s4. they sent some request to my phone UICC unlock. followed instructions and it says its unlocked. i want to use it outside USA on GSM. is that it? it s unlocked?
Sounds like it. You can pop Inna T-Mobile or ATT Sim and if you DONT get "Sim card error" popup then you are unlock internationally.
I ll try and let you know

[Q] sprint note3 on cricket gsm

I just got a Sprint galaxy note 3 and im trying to make it cricket with the new gsm network. I ordered a sim card and I attempted to do the sim unlock but it is not working. I rooted it and verified that it is rooted with an app to check it. I also installed super su like the directions said and also installed region lock away. I still cant get the phone to accept the sim. It says "invalid card". I checked the Stats on it and it show network unknow. It doesn't even show the phone number program onto the sim. When I take it out it switches back to sprint.
Sprint sim slot is only for lte on sprint in the us...
You need a gsm model such as att or unlocked t-mobile note 3!

VERIZON SAMSUNG GALAXY S4 using Canadian SIM says "This SIM card is not from Verizon"

VERIZON SAMSUNG GALAXY S4 using Canadian SIM says "This SIM card is not from Verizon"
Hi everyone, it's my first time posting..
I have a Galaxy S4 from Verizon that has been factory reset. I inserted my Freedom Mobile SIM and the setup wizard says: "this SIM card is not from Verizon wireless."
Gives three options:
Emergency Call
Turn phone off
Use WiFi
Trying to use the phone does not work.
I followed some instructions online to unlock the phone for free but upon using the dial option it says : "connection problem or invalid MMI code"
None of the codes worked even the one to obtain the IMEI. I can locate the IMEI but I just wanted to try this way to see what happens..
I had the person who gave me the phone contact Verizon for an unlock code and they said that the phone was unlocked and to call Samsung. Samsung said to call Verizon and for the last time...Verizon said it's unlocked.
Is there a way to fix this? Is my SIM card maybe the problem?
The SIM was working fine in my unlocked phone before it broke but I did have some issues before it was working and I was told to get it replaced to fix the issues but I didn't end up doing that since they were resolved on their own.
Are you sure the Verizon s4 is network unlocked and supports Freedom's aws frequencies?
Verizon said they were sure..

How to unlock without the device unlock app?

Hi All - I recently bought a Samsung Galaxy S8 from someone else. It worked fine when I was with T-mobile but when I moved to another network and popped in a new SIM, it asked me to "Enter network unlock code". I figured it must be locked to T-mobile so I reached out to them. They said my account met all the unlock criteria and said they'll send me instructions via email. I got the email two days later saying I need to use the "Device Unlock App". However, there's no such app on phone and there's no way to install it either (its not in the Play Store). I went back to T-mobile and they said since the device wasn't purchased through T-mobile, its not be a T-mobile "branded" phone. My questions are:
1. If its not a T-mobile branded phone, why does it only work on the T-mobile network? I checked its not rooted. It doesn't have any T-mobile apps and doesn't show any splash screen with the T-mobile logo.
2. Someone said that Samsung GS8 locks to the network of the first SIM you put into an unlocked phone. Is that true?
3. T-mobile says they've "whitelisted" my IMEI, so if I can somehow get the Device Unlock app I may be able to unlock it. Any idea how I can do that? Do I need to flash the firmware and install the T-mobile version or is there another way.
Thanks!
If you need to app, you can try here: https://support.t-mobile.com/docs/DOC-14011
However, as your phone is asking for the unlock code, the app might work but not unlock your phone.
You really need to do a network check and see which network is your phone actually locked. If your phone needs unlocking code, you might need factory level codes.
I think you should visit :
https://support.t-mobile.com

S10 + Sprint Unlocked issue

Hi Everyone,
I just bought a brand new s10+ from marketplace. I ran a full imei report and everything is clean & not blacklisted. It was a sprint phone however the provider I use is consumer cellular (uses ATT towers). When I put my sim card in it obviously said invalid sim and request it get unlocked. I wasnt concerned because I was going to convert it to unlocked anyways via odin like I did my note 9. I reflashed it via odin with the u1 firmware. However the same thing is happening it keeps saying invalid sim and the button for mobile operators is not showing. I have a tmobile sim card and if I put that in it works fine. Being though tmobile and sprint are the same thats why it works fine. I also have a ATT sim card, If i put that in I get the same invalid sim message. So it still appears to be locked somehow. Only sprint / t mobile sim works. I thought by reflashing to unlocked it would unlock the phone sim.
Just to be clear the phone is brand new and never was attached to any account.
Any ideas? I dont know what to do here.
Thanks!!
As I understand, phones that are locked to a network are not just software branded... also the phones hardware ID. So flashing a generic firmware is not enough. You need to get the phone unlocked from the phone's original operator
I found out what I had to do. I had to use a remote unlock service to remove the software lock on the phone. Its fine now. Thanks

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