Just to report. My Orange SIM works flawlessly upon landing in Paris. I have been using it in Dubrovnik and Korcula, Croatia for the last 4 days without any issues. Yesterday morning, I reloaded 20 Euros into the account before getting on the ferry to Hvar, Croatia. Upon landing, in Hvar about 2 hours later, our account was almost empty.
I google for their customer service phone number and found - 902 011 900 - dial without the country code (+34). At first, they said, my account doesn't have text message included and each text message will cost 1.21 euros. I said, that's not right because I have the Go Europe plan and it's 1 euro/day. They had to create a case and fix my account. I'm not sure what happened, but I am suspecting the reload may have reset my account without Go Europe plan. If your account is getting empty quickly, call the customer service # above and have them check to make sure Go Europe is enabled.