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Mobile Phone Remote Unlocking

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From: wb8foz@panix.com (David)
Newsgroups: comp.dcom.telecom
Subject: Mobile Phone Remote Unlocking
Date: 5 Mar 2024 12:53:34 -0500
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by: David - Tue, 5 Mar 2024 17:53 UTC

So some phones are sold as locked to a carrier. It's seemingly a crypto
scheme based on the IMEI. At some point, after X number of months, the
carrier may unlock the phone.

I'm interested in the unlocking process. In some cases, the carrier
issues the user a code for entering via the keyboard.

There is also a scheme to allow remote unlocking. I'm curious how that
actually works; how does the phone receive the unlock code? This issue
is: the phone number may have already been ported to another carrier.

Some sources say the GSMA trade association had an online database of
every GSM phone made, and the locked/unlocked status is stored there;
meaning the phone must consult it; how?

What about non-GSM phones?

Any cites to the innards of the process?

!07/11 PDP a ni deppart m'I !pleH

computers / comp.dcom.telecom / Mobile Phone Remote Unlocking