[PLUG-TALK] Mobile phone issues

Rich Shepard rshepard at appl-ecosys.com
Fri Aug 19 00:28:51 UTC 2022


I'm working with my VMNO to get my new phone working, and have a question
their support staff likely couldn't answer as well as some here could.

I had to buy two new 5G phones and purchased Samsung Galaxy A71 5G. One has
worked flawlessly since it was activated. The other stopped charging after a
month and the vendor replaced it.

The replacement would not make or receive voice calls. SMS worked, so did
web access. But as soon as I entered a phone number the phone displayed
'call ended' and returned me to the keypad. No one calling that number was
able to connect.

My web searches for this annoyance found multiple people experiencing this
same problem with many brands and models of phones and all network
providers. Two reasons for this problem were prevalent: a misconfigured
phone and a corrupted SIM card. Multiple, long phone sessions with my VMNO
made sure my phone was properly configured and the network properly
configured at both their and my end. That left the SIM card.

Finally, yesterday, a new SIM card arrived. I called the VMNO and the support
tech transfered the phone number to that ICCID. Took out the SIM card,
waited 10 minutes, re-inserted it. The phone had lost all mobile network
configuration; I assume that's kept on the SIM card so the new one wouldn't
have it. Using the VMNO's configure-handset page I entered all relevant data
and pressed 'save.' It wasn't saved. I've repeated this futile effort an
additional three times.

My question: if the mobile network settings aren't being saved on the new
SIM card (they likely were on the old one) is the problem with the SIM card
or the phone? I suspect the former, but know less about mobile phones and
networks than I do about diesel engine injector pumps (very limited and
superficial knowledge.)

I need to get this phone working and will call them again tomorrow, but I'd
like to be more certain why the mobile network details aren't saved when I
call them.

Regards,

Rich



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