See the table at the bottom of this page: Will my existing SIM card work? What countries and networks will be supported? – Purism
To find out for sure, follow the guide suggested here: How One Find Modem Specs? - #2 by irvinewade
I think people will hesitate to buy your L5 if it’s unknown exactly which modem is inside it. (Even if they know they can replace it cheaply with a new one from Purism.)