In this scenario, if you make the separate orders, Jolla jave said they will combine them and refund your shipping.
https://forum.sailfishos.org/t/jolla-phone-update-final-payments-status-batch-1-2-and-3
If you have multiple Jolla Phone pre-orders, you’ll receive multiple emails for final payment (bear with us, no comments needed
) We will refund any duplicate shipping costs