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3 Messages

Mar 7, 2022

ATT cell phone service not working with Lineage OS 17 or 18​

Hello,

The cell phone I've been using here

in the USA is a Motorola G7 Plus,

with the Lineage 17.1 OS.

Lineage OS is a fork of Android

The reason to use Lineage is that it is DeGoogled

More info on Lineage here.

5 De-Googled Android-based Operating Systems to Free Your Smartphone from Google and other Big Tech

5 De-Googled Android-based Operating Systems

Concerned about your privacy or want to give another life to your smartphone? You could consider these Android distributions and custom ROMs.

itsfoss.com

This Lineage 17.1 phone has worked fine with ATT since early 2021.

But March 2, 2022, I suddenly couldn't make a phone call.

Immediately, the call would end, and a message displayed:

"Call ended".

I'm assuming that this has to do with ATT's 5G upgrade.

ATT docs says that the Moto G7 Plus will work after the 5G upgrade

https://www.att.com/idpassets/images/support/wireless/Devices-Working-on-ATT-Network.pdf

So I did some tests with some other phones I have.

Here are the results after swapping the

same SIM card with the various phones:

...

Motorola G7 Plus, Lineage 17.1

- call ended

Motorola G7 Plus, Lineage 18.1

- call ended

Samsung Galaxy A32, out of the box Android

- calls work fine

Motorola G7, out of the box Android

- calls work fine

...

So, the SIM card is working on factory Android

But the same ATT SIM card is NOT working with Lineage OS.

...

q1:

Is there a setting that I need to tweak to

make Lineage work with ATT 5G?

q2:

What is ATT's roadmap to get Lineage OS

cell phones to work on their network?

If Lineage won't work with ATT, I will be

looking for a carrier that does work with Lineage.

Thanks a lot

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https://forums.att.com/users/5defae6ff6e8ee15674daa0d

formerlyknownas​

+76 more

ACE - Sage

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94.8K Messages

a month ago

My guess is you should be on your way to another carrier

🐾 I don’t work for AT&T or any carrier. Never have, never will. My replies are based on experience and reading content available on the website. If you posted personal information, please edit and remove.

Award for Community Excellence 2021 Achiever*

*I am not an AT&T employee, and the views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.

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https://forums.att.com/users/5defa677fd08351cbe19f0c7

GLIMMERMAN76​

+65 more

ACE - Expert

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23.1K Messages

a month ago

You should look for another carrier as in T-Mobile. Verizon has problems supporting phones running non conforming OS. I would say there is problem in the modem stack on that phone.

Award for Community Excellence 2021 Achiever*

*I am not an AT&T employee, and the views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.

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https://forums.att.com/users/622638a846992233368d5763

techquestions​

New Member

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3 Messages

a month ago

First of all, I want to thank all the

ATT staff for their help in solving

this tough tech problem

Note: this is sarcarm

ATT staff, so far, have had a 100% failure ratio

in even responding to my post

Perhaps no one from ATT even read it

"Take off, figure it out yourselves"

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https://forums.att.com/users/622638a846992233368d5763

techquestions​

New Member

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3 Messages

a month ago

Hello all,

More on the Lineage / ATT drama

So, I tried calling ATT's 611 today.

Did not get a person, just a IVR server asking stupid questions.

I kept asking for "agent".

Because, Lineage OS will NOT be in their

pre-programmed set of recorded responses.

IVR kept asking the same questions.

And I kept saying "agent".

So it said, "good bye"

So rude

(What I call the management by middle finger

"Don't bug us, take off, figure it out yourself!" )

...

Went to the ATT store to give an update, and

ask for more info.

The customer disservice agent just kept

saying "I don't know" when I told him my

hardware was certified for ATT.

Note: I wasn't asking him. I was telling him.

When I showed him the ATT print out,

he refused to look at it, and refused

to recognize the fact.

He kept interrupting, giving me contradiction functions.

Later when he saw the Samsung A32 on my printout of results,

he interrupted again, and said that only A32 5G

would work on ATT.

Completely ignoring the fact that I'd just told him

my A32 is working fine with ATT.

Lots of attitude problems on his part.

Toward the end, he asked, "what is the problem?".

I said, "well I've told you three times now"

But even though I'd told him three times,

he still didn't know what the issue was!

Do you think there's a correlation between the fact

that he kept interrupting, wasn't listening,

refused to recognize facts, or even look, and

he still didn't know what the issue was?

What a useless, black hole, waste of my time!

Why does ATT hire narcissistic people,

who can't communicate, and then put them into

customer interfacing positions?

Do they also put the same people in financial department?

One good info I got was that they did say that

as an ATT store, they have managed to speak to 611.

When I asked how long it took to get through, the usual

knee (Edited per community guidelines) reaction was, "it depends". (Yes, we know.)

"In your experience, how long does it normally take to get through?"

Eventually two of them concluded, after 10 to 15 minutes of waiting!

As least they got through to 611.

Are the 611 phone systems programmed to

only answer the ATT store call IDs?

Also, not even the stores can contact engineering.

Seems engineering is in their glass tower.

Saying, "don't bug us!"

And that engineering doesn't care to hear that there are

real problems on their network, and

that dozens of hours of just one customer's time (me)

is being wasted, over days and weeks.

...

Also went to the T Mobile store.

The rep inserted a T Mobile SIM in my Lineage 17.1, and the

phone lit up with text messages, and we could make a call.

(Do you see the multiple contrasts with the ATT rep?)

So, at least for the moment,

TMobile seems to work with

Moto G7 Plus, Lineage 17.1

Guess which carrier I'm inclined to go with?

Guess which carrier is better,

from a customer service standpoint?

(edited)

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coshman​

New Member

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1 Message

a month ago

Same with my Moto G7. ATT stopped working for call functions. Tried a T-Mobile SIM and it works perfectly. Nothing wrong with my phone, just an attempt by ATT to force you into buying a new one they control.

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Confused2much​

New Member

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1 Message

5 days ago

Hello,

I, too, have a Moto G7 Plus that stopped making/receiving calls on March 2, 2022. I have even tried a T-Mobile SIM - same result, I can text and access mobile data, but can't make/receive calls. Tried for hours to get this resolved with their reps with no luck. Anybody have any ideas? I love this phone and paid good money to have it deGoogled (using LineageOS 18.1).

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Potatoalien​

New Member

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1 Message

an hour ago

I don't know why (maybe a LOS issue), but when you switch to another carrier, in order for a smartphone to work with text and calls you have (at least works for me) to reinstall the stock Android ROM, ensure that calls and texts work, then install Lineage OS over top of the stock ROM. Then calls and text work. I used TWRP (.IMG, then WIPE all except external SD card, then install twrp.zip, then RESTORE backup (SYSTEM IMAGE), then reboot phone and test calls & text, then go back into twrp and INSTALL Lineage OS (no WIPE is done), then test calls & text (should work now). According to my method, you'll need a twrp backup of your SYSTEM IMAGE (stock ROM of Android). If you don't have, maybe you can find on internet, or buy a backup identical phone from eBay and unlock the bootloader and install twrp and do BACKUP of SYSTEM IMAGE onto external SD card. You will need to rename the serial number of the backup to your phone's serial number. You can find out your phone's serial number by doing a BACKUP of any option in twrp.

Also people sometimes get an error 225 code when doing a BACKUP or a RESTORE in twrp. If so, try only doing a BACKUP/RESTORE if SYSTEM IMAGE only, not a separate BACKUP/RESTORE of Data, System, Boot.

I think Lineage OS is at fault here with why you have trouble with calls, text. I think there is code removed from the Android stock ROM when Lineage is created; this code is necessary to be left in, but isn't. I write that Lineage OS must be at fault because Android OS stock ROM works with calls, text. When Lineage is INSTALLED over top of Android stock ROM, there must be settings on phone (somewhere......) that were placed there by Android OS, and these remain there if you INSTALL Lineage over top of Android OS.

I discovered thus problem a number if years ago with my Moto E 2nd Gen phone, and this problem still exists with my Moto G7 phone. So I have to reinstall stock ROM, then Lineage over top of it. To add to the fun you might have difficulty with installing the stock ROM onto the phone. If so, can try this: using twrp, install Lineage and do a factory reset. Then go back and try installing the stock ROM using steps I wrote. Also, when you install it and it starts booting up, it might fully boot, so you need to restart phone again to get stock ROM to fully boot up.

And if you hardbrick (no response from it) your phone, you should use a blankflash (that matches your phone model or is possibly similar to it) to unbrick it. Run in adb fastboot, then plug your phone in and it should unbrick.

Another thing: if your USB cable is faulty, you need to get another one that works. A good cable is edl cable, that's what I use.

There is a lot I don't know, there are things I know - hopefully this helps.

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