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first, try here -...

see here- https://www.safelinkwireless.com/Enrollment/Safelink/en/Web/www/default/index.html#!/pendingMinutes

here's the AT&T version specs - https://www.att.com/device-support/article/wireless/KM1332200/Sonim/XP3800
the version you have may be a Verizon or a Sprint version.

try contacting Verizon to see if there's a text messaging service block active on your account

see this here - https://www.reddit.com/r/ATT/comments/imo3uq/how_to_transfer_out_of_firstnet_to_att_consumer/

is the phone unlocked ??

the very last line in post #1 Last edited by Serial Port; 02-02-2020 at 09:59 AM. Reason: link deleted as spam

last i heard is that Verizon is pausing 3G shutdown indefinitely - https://www.theverge.com/2021/1/5/22215453/verizon-3g-shutdown-paused-delay-network-old-phones

try here - https://calyxinstitute.org/membership/devices/device-troubleshooting

that's the only way to check to see if the phone is actually unlocked, insert a non tracfone sim into the phone.

seems like it's happening to total wireless users also - https://www.reddit.com/r/NoContract/comments/kivpv9/lte_calls_turned_off_total_wireless/

should be *86 - https://support.boom.us/111735-Voicemail-Support--FAQs

according to this - https://forums.att.com/conversations/samsung/galaxy-s21-dual-sim-esim/602b0e95d396ba4ad498a67d AT&T has blocked the phone from supporting the eSIM.

Verizon locks their phones for 60 days from purchase - https://www.verizon.com/support/device-locking-faqs/

check your phone to see if it has any other apps that help manage wifi hotspots, some AT&T phones have them preinstalled. maybe you need to install their app in order to connect to xfinity WIFI.

does your phone have trouble connecting to any other public wifi hotspots such as your local library fast food place or dept store ??

here - https://www.reddit.com/r/NoContract/comments/bjbeh9/the_catch_with_hello_mobile_25_sprint_unlimited/

once you use up your high speed data, you will be reduced to unlimited 2G data around 264 kbps.

see here - https://www.verizon.com/support/4g-sim-card-faqs/

what sim are you trying to use with the phone ?? when you insert the non AT&T sim into the phone, you should get a box popup to enter the unlock code.

according to this - https://www.howardforums.com/showthread.php/1911219-Sucessfull-VoLTE-Activation-on-Prepaid!
post #1
*Note: VoLTE on AT&T works on all iPhone's 6 and up and also AT&T Branded...

is your moto E4 the unlocked, unbranded version ??

you can view your mobile bill statements & call & text activity - https://www.verizon.com/support/view-latest-bill/

look like no on has gotten this yet - https://www.reddit.com/r/NoContract/comments/lip5ya/safelink_offering_free_upgrade_to_unlimited/

see this reddit thread - https://www.reddit.com/r/Sprint/comments/k2e7s0/activating_pixel_4a_5g_on_sprint_with_kickstart/