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The Samsung Galaxy S23
Mako007uk's profile

New Member

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3 Messages

Thursday, December 1st, 2022 5:10 PM

AGM compatibility with AT&T.

Could you please confirm if an unlocked AGM H5 Pro model phone will work with AT&T network or not?

Thank you very much.

Regards, 

Accepted Solution

Official Solution

ACE - Sage

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107.3K Messages

6 months ago

No.  

I've never heard of that brand, which pretty much means it's not on the list of common brands that AT&T (and Verizon) will allow. There is also an IMEI check.

https://www.att.com/buy/byod/identify?devicetype=phone

List of non AT&T compatible phones

Accepted Solution

ACE - Sage

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107.3K Messages

6 months ago

It is no longer about "compatible bands" since 3g is shut off.

You will find compatible bands on a lot of phones and still find the IMEI is not accepted by any US carrier.  Voice won't work.  And the carrier will suspend the service and kick the phone off the network. 

In the past phones would work just fine with data over the LTE network but fell back to the 3G network for voice calls. 

   The FCC requires that all phones on US networks be able to be used as a phone to dial 911. You cannot use a virtual number to call 911.

Since 3G has been shut off for both AT&T and t-mobile, and there are less than 30 days for Verizon before they shut down their CDMA (2 & 3g) Network, VoLTE is a must.

 

Black view Doogee, Umidigi ) apparently sell many units on eBay

None of those Brands will work on AT&T or Verizon. Yes, they would be T-Mobile customers. 

I have been using unlocked phones on AT&T since 2014 including an honor, an international Samsung S6, a Nexus 6p, OnePlus 5T.  None were capable of voice calls over the LTE network, all of them were excluded from the network and did not have voice over LTE as of 2019. I was also aware that the OnePlus 6t which I was using in 2019 did not have voice over LTE at the time. I switched to Verizon with the one plus 6t which was whitelisted for Verizon. A few months later it was whitelisted for AT&T. Verizon was a little more lenient until recently. With the shutdown looming they have begun kicking off some phones that are not certified to work on their Network.

And just so you understand the process was up to the manufacturers to submit phones for testing to see that they did work on the network. Phones that were submitted for testing and did work were certified and added to the list of phones that I left you in the previous link. Many Brands did not certify their phones, did not even submit for testing and therefore have been excluded.  The manufacturer's choice to exclude themselves

(edited)

ACE - Sage

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107.3K Messages

6 months ago

By the way if you look up this phone on Amazon the only us carrier that says it might be compatible with is T-Mobile. You might want to check T-Mobile's IMEI check

New Member

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3 Messages

6 months ago

Thank you very much for the responses & links. "Been there, done that"! Yes, I have been scouring the internet for the last 2 days for the answer but finding nothing but conflicting information?

I have not bought the phone, for obvious reasons, therefore, do not have an IEMI number. I think I am correct in thinking that can only be found on the actual unit?

Almost all of the 4G LTE bands that ATT use are listed within the description of the phone on Ebay. As are the bands for T-Mobile. The seller recommends for T- mobile but states will not work on ATT despite the list of bands being almost identical?

The phone manufacturer does not say either way but the previous model, with the same bands, is stated as working with ATT!?

Do you see why I am not sure? 😁

ATT bands are 2,4,5,12,14,17,29,30,66.

Bands covered in phone description are 2,4,5,12,17,66.

On face it should work so why is the seller saying it will not? Could there be a frequency issue?

Many of this & other off brand rugged phone manufacturers ( Black view Doogee, Umidigi ) apparently sell many units on eBay , all using same stated bands, & I find it hard to believe they are all T-Mobile customers?

I was hoping there would be one person within ATT community on the forum that had been through this previously.

I have contacted sellers & they are non committal.

My head is spinning a little. 😃

ATTHelp

Community Support

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215.1K Messages

6 months ago

Hello @Mako007uk, we understand the importance of making sure the device will work on the AT&T network. We're happy to provide information that will help resolve your concerns. 

 

Thank you, @formerlyknownas for the information provided

 

In addition, It’s important to check the device model number to make sure it’s still supported after the 3G network shutdown. Check out our list of approved unlocked devices and capabilities to make sure it is compatible with the AT&T network. 

  • Once you know your device still works, you may need to restart your device or check the VoLTE or LTE status. Your phone will work if the HD Voice feature is turned on.
  • Since we shut down the 3G network, there won't be data or voice service for devices that don't have at least have 4G capabilities. This means that while some device features might still work, but, you won't be able to access our network unless you upgrade to a newer device.
  • Don’t see your phone make and model on the list? That means it may not work anymore. You may need to swap or upgrade to a new one.

Keep in mind: AT&T cannot guarantee the capabilities or performance of any individual device that was not purchased directly from AT&T or an authorized retailer of AT&T.

 

We're here if you have any questions. Thank you for contacting AT&T Community Forums. 

 

Alasani, AT&T Community Specialist 

ATTHelp

Community Support

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215.1K Messages

6 months ago

Thank you for reaching back out @Mako007uk.

 

Based on the information you have provided on the device, it does not appear on our list of unlocked devices. As mentioned above you can check the exact make and model of your device with the list provided to confirm.

  • If you don’t see your phone make and model on the list, this means it may not work anymore. You may need to swap or upgrade to a new one.

AT&T cannot guarantee the capabilities or performance of any individual device that was not purchased directly from AT&T or an authorized retailer of AT&T.

 

Feel free to reach back out to us if you have any questions, we're happy to help. Thank you again for reaching out to AT&T Community Forums. 

 

Alasani, AT&T Community Specialist 

New Member

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3 Messages

6 months ago

Brilliant explanation 'formerlyknownas' , thank you so much for taking the time & effort to explain in detail.

Thank you also AT&T.

I have my answer!

"Cheers!"

ACE - Sage

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107.3K Messages

6 months ago

Glad to help

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