I had them send the SIM to my sister’s house (she had a new baby and I didn’t want to ask her to go the the phone store). Saved me a ton of time (none of the phone stores were close) and no shocking roaming bill when I got home!
I was at Mobile World Congress 2017 in Barcelona and this was an absolute lifesaver. The WiFi at the show was patchy. With a local sim my associates easily called me when they found interesting products.
It is quite amazing that I was able to use my Vodafone sim card from B4i.travel in Slovenia, Lithuania and Turkey for whatsapp and retrieving my emails on 4G without paying expensive data roaming costs.