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The Samsung Galaxy S24
rawfish's profile

Contributor

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6 Messages

Tuesday, June 14th, 2022 8:31 PM

H2O SIM in ATT Phoenix 4 (LM-X210APM) would not register on network

I've an unlocked ATT Phoenix 4 (LM-X210APM) that is on the approved and supported list. I'm unable to register on the network with my carrier's SIM H2O (ATT MVNO). No cellular voice/data, however, Wifi Calling does work.

I've had success with a Moto G Stylus, but that is not phone for this SIM.

Any suggestion on what I can try to resolve this? 

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Official Solution

ACE - Expert

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23.9K Messages

2 years ago

contact H2O if the phone is unlocked its not ATT's problem.

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Official Solution

Contributor

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6 Messages

2 years ago

To update on the issue

Yes, I did finally contact H2O and the solution is to add an APN. It appears with the 3G shutdown, the phone now needs APN for voice/text/data.

This are the settings they gave me.

NAME:H2O

APN: PRODATA

MMSC: http://mmsc.mobile.att.net

MMS proxy: proxy.mobile.att.net
MMS port: 80

APN type: default,supl,hipri

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