Sorry to wake up an old thread but I have a problem which seems to prove your theory wrong.
Boys and Girls, Let me kick the confusion out of this thread.
To confirm, the SIMs never expire, unless they have already been activated, or they are really old pre 2G era SIMs (which if you find one, please post it to me for my collection :catwink 🙂 . What we are doing as part of MSISDN Reuse Project is to disassociate the MSISDN from preactivated SIMs older than a certain period. It wouldn't stop you to activate those SIMs, as a new MSISDN will get dynamically allotted to it. The only downside to this process is that it would take comparatively longer for a dynamic activation to go through. Our tests have shown that the dynamic activatiion takes on an average 2 hours. So the moral of the story, we are trying to recycle the MSISDN to control the costs and to be Green. But please dont throw away older SIMs, as they won't expire. (4G may eventually expire them, just as 3G expired 2G SIMs)
I am trying to activate an old SIM which is less than 30 months old and is a 4G SIM.
I log in to my account for this particular sim and get taken to the Activate/Order New SIM page.
I select Activate and carefully enter the serial code on the SIM, hit Continue and the page refreshes and I see the following message:
"Sorry, that SIM has already been activated. You can either ask an agent for help or just order another SIM."
If anyone has a clue why my SIM would show correctly as not activated but then be blocked by GiffGaff claiming that it is already active that would be great. 🙂
If anyone can explain to me how to fix this that would be awesome. 😀