Used Three SIM card in my mifi whilst abroad. 3G only and limited to 19Gb per month.
Have now swapped to Vodafone 100gb, 4G, and no limit
Have you been able to compare vodafone while roaming yet?
I ve been using Three for a few years now, its fine in Uk but the throttling while roaming seems to be getting worse. France can be really slow. I'm wondering if vodafone is any better.