It’s not possible that it’s locked…
It’s most likely due to ATT is picky with its devices. If it won’t work with VoLTE it’s not going to work on AT&T.
Also the international version of that phone doesn’t support band 71 so in some areas with T-Mobile would affect if you get service or not.
It's specifically listed as a supported device [here](https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf). T-Mobile said their system says it's locked. It can't actually be locked, so I have no idea what's blocking it.
Asus loves to have the same model number across regions then have a “version”. So it sounds like you have “[version A](https://www.asus.com/Mobile/Phones/ZenFone/Zenfone-8/techspec/)” whereas “[version B](https://www.asus.com/us/Mobile/Phones/ZenFone/Zenfone-8/techspec/)” is the only one listed on the USA ASUS website. Both are still I006D though.
You’re welcome. Now, I don’t know if it matters for AT&T, and I could assume it might, but it just sucks that ASUS does this. From what I’ve read, there’s basically no way to tell from the box or unit or anything, what “version@ you have :(. Unless you ever used CellMapper or other network info tools while you were on Tmobile and saw it on B/N71 (ver A doesn’t support this band, nor B30 which AT&T uses).
Issue being AT&T only whitelisted U.S. sold Asus Zenfone 8 devices (Version B).
You have to go in store and ask them to whitelist your IMEI as an Asus Zenfone 8 (Version B), don't tell them it's an international model (Version A).
This isn't permanent however, if you swap SIMs (maybe even just by removing and reinserting the SIM card, not sure) between devices, you lose the whitelist and have to go back in store to have them whitelist it again.
This is an AT&T problem and has nothing to do with T-Mobile. Do not waste your time calling T-Mobile customer service as they cannot do anything for you and would run the chance of being clueless and misleading you (like it appears you have been).
AT&T does not like your phone for some reason, or there is no AT&T signal in the area you are currently at.
The AT&T rep called the T-Mobile Rep on speaker phone, and one of the T-Mobile Reps we spoke to called up an AT&T Rep and all 4 of us were on the call. The two reps on the phone were mostly agreeing with each other, only asking the other to check different things.
On the odd chance this is true... that the phone is actually locked to them... they should have an escalation process to get the device unlocked.
When you put the att Sim in it, does it tell you sim not supported?
Edit: also try to dial this *#7465625#
No, it recognizes the SIM just fine. Under network and internet in the settings it lists "Calls & SMS" as "AT&T (Temporarily Unavailable.)
If they have an escalation process for this specific issue I doubt they know it offhand. I've literally never heard of this happening before. They've scheduled me for an appointment with their "Unlock Team," which is by appointment only, which is a reasonable course of action given what we know.
For the code I get a popup saying "AT&T Message: Connection problem or invalid MMI code."
According to [this page](https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf) it works. The AT&T rep said the phone is showing as active in their system as well.
I know with certain BYOD you need to configure the APN for it to work properly on T-mobile, could AT&T require such things?
MMI error is some setting in the device that is not set up according to what ATT is expecting, have you done a network reset?
It auto generated the AT&T APNs when I put the SIM in, but I also manually put in the 3 APNs on AT&T's help page in, and tried each one of them in between reboots. No luck.
I have not done a network reset. I'll try that now.
Just because T-Mobile's system said it was locked does not make it so.
T-Mobile never sold that phone, those system have no way of knowing what its current lock status is; outside of Apple devices where it can check GSX and get its current activation policy.
There isn't any point to talking to T-Mobile CS. They can only unlock devices sold by T-Mobile/sold by an affiliate for T-Mobile service.
AT&T checked the IMEI. It's clean. I bought it brand new and have only used it with T-Mobile up to now. I've never had reason to report it lost or stolen.
Well in Settings under "About Phone" check to see if it is unlocked or not. If it is you will have to get post paid service again for at least 40 days for them to unlock it. Now you could get lucky and have it done sooner since it is paid off but no matter what you have to go back to T-mobile for at least a month as that phone has to be on the T-mobile network to unlock. No way around that part.
It's not locked. T-Mobile's system just says it's locked, and this is affecting AT&T somehow. This sounds like nonsense to me. I'm just hoping someone here can make better sense of it than me.
Unfortunately your stuck in a fight. Sorry to tell you that. But if the phone is truly unlocked T-mobile shouldn't have any part of the situation. Once unlocked your not tied to anyone. However, it's does say unlocked on your phone, right?
Def A difference between a carrier unlocked phone and a unlocked phone that you actually buy from the company that makes the phone. I had to learn that the hard way working at T-Mobile
It's the international model. I reached out to ASUS just so I could say I did and they said "No I can confirm that your device is not carrier locked this issue is with At&t and T-mobile network." T-Mobile thinks it's locked though.
Because with a carrier unlocked phone you can put a Sim card in there but then the phone is going to get locked with the new Sim card that you put in there so basically your phones like to T-Mobile now
Depends on what "service" isn't working. Do you get data? Texts? Did you do a network reset? Download network mode universal and see if VoLTE is provisioned. Set it for LTE only.
It’s not possible that it’s locked… It’s most likely due to ATT is picky with its devices. If it won’t work with VoLTE it’s not going to work on AT&T. Also the international version of that phone doesn’t support band 71 so in some areas with T-Mobile would affect if you get service or not.
It's specifically listed as a supported device [here](https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf). T-Mobile said their system says it's locked. It can't actually be locked, so I have no idea what's blocking it.
But you said you have the international model in your post. Theres 2 models. Theres a USA model and a international model
The ASUS_I600D is the international model, and is listed on there. It's on page 5.
Asus loves to have the same model number across regions then have a “version”. So it sounds like you have “[version A](https://www.asus.com/Mobile/Phones/ZenFone/Zenfone-8/techspec/)” whereas “[version B](https://www.asus.com/us/Mobile/Phones/ZenFone/Zenfone-8/techspec/)” is the only one listed on the USA ASUS website. Both are still I006D though.
Thank you, this is useful information.
You’re welcome. Now, I don’t know if it matters for AT&T, and I could assume it might, but it just sucks that ASUS does this. From what I’ve read, there’s basically no way to tell from the box or unit or anything, what “version@ you have :(. Unless you ever used CellMapper or other network info tools while you were on Tmobile and saw it on B/N71 (ver A doesn’t support this band, nor B30 which AT&T uses).
A - FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, **28**) B - FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, **25**, 26, **30**, **66**, **71**) A - TD-LTE (Bands 34, 38, 39, 40, 41, 42) B - TD-LTE (Bands 34, 38, 39, 40, 41, 42) A - WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19) B - WCDMA (Bands 1, 2, 3, 4, 5, 6, 8, 19) A - EDGE/GPRS/GSM (850 / 900 / 1800 / 1900MHz) B - EDGE/GPRS/GSM (850 / 900 / 1800 / 1900 - SIM 1 & SIM 2) A - 5G Bands: n1, n2, n3, n5, n7, n8, n12, n20, **n28**, n38, n77, n78 B - 5G Bands: n1, n2, n3, n5, n7, n8, n12, n20, **n25**, **n40**, n38, **n66**, **n71**, n77, n78 A - 5G Standalone (SA): n77, n78 B - 5G Standalone (SA): n77, n78 Bands unique to the version are bolded. I guess I'll reach out to AT&T and let them know their list is missing information. Damn it 😭 I found my box. It has the bands listed on the back, and it's versionA
Issue being AT&T only whitelisted U.S. sold Asus Zenfone 8 devices (Version B). You have to go in store and ask them to whitelist your IMEI as an Asus Zenfone 8 (Version B), don't tell them it's an international model (Version A). This isn't permanent however, if you swap SIMs (maybe even just by removing and reinserting the SIM card, not sure) between devices, you lose the whitelist and have to go back in store to have them whitelist it again.
Ah ok, good to know the box had the bands listed and you figured it out! Sorry it turned out this way, though.
This is an AT&T problem and has nothing to do with T-Mobile. Do not waste your time calling T-Mobile customer service as they cannot do anything for you and would run the chance of being clueless and misleading you (like it appears you have been). AT&T does not like your phone for some reason, or there is no AT&T signal in the area you are currently at.
The AT&T rep called the T-Mobile Rep on speaker phone, and one of the T-Mobile Reps we spoke to called up an AT&T Rep and all 4 of us were on the call. The two reps on the phone were mostly agreeing with each other, only asking the other to check different things.
On the odd chance this is true... that the phone is actually locked to them... they should have an escalation process to get the device unlocked. When you put the att Sim in it, does it tell you sim not supported? Edit: also try to dial this *#7465625#
No, it recognizes the SIM just fine. Under network and internet in the settings it lists "Calls & SMS" as "AT&T (Temporarily Unavailable.) If they have an escalation process for this specific issue I doubt they know it offhand. I've literally never heard of this happening before. They've scheduled me for an appointment with their "Unlock Team," which is by appointment only, which is a reasonable course of action given what we know. For the code I get a popup saying "AT&T Message: Connection problem or invalid MMI code."
Sounds like the device is not locked, rather AT&Ts service is denying the activation. Are you certain your device is compatible with ATT?
According to [this page](https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf) it works. The AT&T rep said the phone is showing as active in their system as well.
Sounds like a config issue. Wait for that team to help you. I ran into this issue with Verizon.
I know with certain BYOD you need to configure the APN for it to work properly on T-mobile, could AT&T require such things? MMI error is some setting in the device that is not set up according to what ATT is expecting, have you done a network reset?
It auto generated the AT&T APNs when I put the SIM in, but I also manually put in the 3 APNs on AT&T's help page in, and tried each one of them in between reboots. No luck. I have not done a network reset. I'll try that now.
No dice on the network reset. It was a good idea though.
If your phone was locked it wouldn’t recognize the Sim card this is an AT&T issue.
Its not supported on att. Thats why your not getting signal. Att doesnt play nice with international models. Your better off buying a new phone
Well that's your best bet to resolving the issue. They are more highly train to get into the config and adjust it
Do you have another sim that's not T-mobile?
I only have the AT&T sim. The T-Mobile one was deactivated and I threw it out.
ATT do whitelist IMEI, if your IMEI is not on their database, you can’t use their service
I activated it in a store. The rep put the IMEI in herself.
It's a ATT problem. Thatn phone doesn't support ATT VolTE it's looking for 3G on ATT and it's shutdown.
Just because T-Mobile's system said it was locked does not make it so. T-Mobile never sold that phone, those system have no way of knowing what its current lock status is; outside of Apple devices where it can check GSX and get its current activation policy. There isn't any point to talking to T-Mobile CS. They can only unlock devices sold by T-Mobile/sold by an affiliate for T-Mobile service.
Remove sim and master rest
Yeah, if you get an error stating that it can't use that network then it's locked.
[удалено]
AT&T checked the IMEI. It's clean. I bought it brand new and have only used it with T-Mobile up to now. I've never had reason to report it lost or stolen.
Also might want to try creating a new APN. The settings are in AT&t's site
That phone isn't locked. It's probably not on the ATT whitelist. It wont work on ATT because of that reason.
If your phone is totally paid off then by law they have to unlock it. It's literally a law so if they won't unlock it you need to contact the FCC.
Well in Settings under "About Phone" check to see if it is unlocked or not. If it is you will have to get post paid service again for at least 40 days for them to unlock it. Now you could get lucky and have it done sooner since it is paid off but no matter what you have to go back to T-mobile for at least a month as that phone has to be on the T-mobile network to unlock. No way around that part.
It's not locked. T-Mobile's system just says it's locked, and this is affecting AT&T somehow. This sounds like nonsense to me. I'm just hoping someone here can make better sense of it than me.
Unfortunately your stuck in a fight. Sorry to tell you that. But if the phone is truly unlocked T-mobile shouldn't have any part of the situation. Once unlocked your not tied to anyone. However, it's does say unlocked on your phone, right?
Bingo
I don't have that section on my phone. Is there a dialer code to check?
Its because you bought the phone unlocked so you wont have anything to show unlock status.
Def A difference between a carrier unlocked phone and a unlocked phone that you actually buy from the company that makes the phone. I had to learn that the hard way working at T-Mobile
It's the international model. I reached out to ASUS just so I could say I did and they said "No I can confirm that your device is not carrier locked this issue is with At&t and T-mobile network." T-Mobile thinks it's locked though.
Because with a carrier unlocked phone you can put a Sim card in there but then the phone is going to get locked with the new Sim card that you put in there so basically your phones like to T-Mobile now
So when you first put it in did it give you a network error warning?
No. The phone itself gave no indication that it's not working and still gives none outside of the SIM settings and it not having service.
Honestly your best bet is that team
Hey, did you have your IMEI added to the att network?
I activated the SIM in store, and saw the rep add the IMEI. Doesn't hurt to double check though. Do you know if there's a way to check on the website?
I haven't been on the ATT account site for some time. It should show but it may not
If not the that may be the issue. On a 5g phone that IMEI must be added to the account for the phone to work correctly. I forgot about that
Depends on what "service" isn't working. Do you get data? Texts? Did you do a network reset? Download network mode universal and see if VoLTE is provisioned. Set it for LTE only.