How to upgrade from NIS to NS Deluxe

I'm currently running the 3-licence version of NIS (22.9.4.8)  on 3 windows computers (which uses up all my 3 licences), and I have 250 days left to run before I need to renew.

I have just bought a mobile smartphone that runs Android and would like to run Norton Mobile Security on it. However, it would seem more cost-effective if I could somehow transfer my existing NIS licence to a new Norton Security Deluxe licence, which would let me run NS on my mobile as well as on my 3 Windows computers.

So, does anyone know if it's possible to do such a transfer without losing the current 250 days left on my NIS licence? If it is, do I then have to separately download Norton Mobile Security from the Google Playstore on my mobile smartphone and then somehow link it to my new Norton Security Deluxe licence?

Hopefully there is a way to do this. Otherwise it would seem that I'd have to wait 250 days for my current NIS licence to expire and then replace it with a new NS Deluxe licence - which means no NS protection on my new mobile for another 9 months, without having to pay for a separate Norton Mobile Security licence!

Many thanks in advance for any help on this one.